Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Datasheet DC-DC Power Modules

Veta



iHA48040A033V* Half Brick Series

48V Input, 3.3V/40A.Output

TDK Innoveta Inc

3320 Matrix Drive, Suite 100

Richardson, Texas 75082

Phone (877) 498-0099 Toll Free

(469) 916-4747

Fax (877) 498-0143 Toll Free

(214) 239-3101 [email protected]

http://www.tdkinnoveta.com/

Information furnished by TDK Innoveta is believed to be accurate and reliable. However, TDK

Innoveta assumes no responsibility for its use, nor for any infringement of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TDK Innoveta. TDK Innoveta components are not designed to be used in applications, such as life support systems, wherein failure or malfunction could result in injury or death. All sales are subject to TDK Innoveta’s Terms and Conditions of Sale, which are available upon request. Specifications are subject to change without notice. TDK logo is a trademark or registered trademark of TDK Corporation.

©2007 TDK Innoveta Inc. iHA Datasheet 040207

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Platform Overview:

Veta



iHA48 Series DC-DC Power Modules

48V Input, 1.2-28V/60A or 350W Output

Half-Brick

The Veta



iHA48 Series power modules operate over a wide 36 – 75Vdc input voltage range and provide one regulated dc output voltage that is electrically isolated from the input. Its high efficiency and superior thermal performance make the Veta



Family of power modules ideally suited for power-hungry applications in demanding thermal environments. This rugged building block is designed to serve as the core of your high reliability system. A wide output voltage trim range and remote sensing are standard features enhancing versatility.

Standard Features:

•

Standard Half Brick footprint

•

High efficiency, 83-93.5% typical

•

Wide output trim voltage

•

Up to 60A of true usable current

•

Industry-leading output power: up to 350W

•

Monotonic start-up

• Monotonic start-up into a prebiased output

•

Basic insulation – 1500 Vdc

•

Constant switching frequency

• Auto-recovery protection: o Input under and over voltage o Current limit o Short circuit o Thermal limit

•

Latched output over voltage protection

•

High reliability open frame, surface-mount construction

•

Baseplate for improved thermal management

•

UL 60950 (US and Canada),

VDE 0805, CB scheme

(IEC950), CE Mark (EN60950)

•

Multiple patents pending

Optional Features:

•

Remote on/off (negative logic)

•

Auto-recovery output over voltage protection

•

Short Thru-hole pins 2.79 mm

(0.110”)

©2007 TDK Innoveta Inc. iHA Datasheet 040207

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Ordering information:

Product

Identifier i

Package Size

H

Platform

A

Input

Voltage

48

Output

Current/

Power

060

Output

Units

A

Main

Output

Voltage

033

# of

Outputs

V -

Safety

Class

0

Feature Set

00

TDK Innoveta Half Brick Veta



36-75V 60 Amps 033 – 3.3V Single

00 – Standard

Feature

Set

On/Off

Logic

Omit pin3

Output OVP Output OCP OTP

00

01

02

03

04

05

06

07

Positive

Negative

Positive

Negative

Positive

Negative

Positive

Negative

No

No

Yes

Yes

No

No

Yes

Yes

Latching

Latching

Auto-Recovery

Auto-Recovery

Auto-Recovery

Auto-Recovery

Auto-Recovery Auto-Recovery Auto-Recovery

Auto-Recovery Auto-Recovery Auto-Recovery

Latching Auto-Recovery Auto-Recovery

Latching

Auto-Recovery

Auto-Recovery

Auto-Recovery Auto-Recovery

Auto-Recovery

Auto-Recovery

Auto-Recovery

Auto-Recovery

OVP: Over Voltage Protection; OCP: Over Current Protection; OTP: Over Temperature Protection.

Threaded

Inserts

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Product Offering:

Code Input Voltage Output Voltage Output Current

Maximum Output

Power

Pin

Length

0.145”

0.145”

0.145”

0.145”

0.110”

0.110”

0.110”

0.110”

Efficiency iHA48060A012V-000 iHA48060A015V-000 iHA48060A018V-000 iHA48060A025V-000 iHA48060A033V-000 iHA48040A033V-000 iHA48060A050V-000 iHA48040A050V-000 iHA48025A120V-000 iHA48013A240V-000 iHA48011A280V-000 iHA48016A280V-000 40V to 60V

TDK Innoveta Inc

3320 Matrix Drive, Suite 100

Richardson, Texas 75082

Phone (877) 498-0099 Toll Free

(469) 916-4747

Fax (877) 498-0143 Toll Free

(214) 239-3101 [email protected]

http://www.tdkinnoveta.com/

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

36V to 75V

1.2V

1.5V

1.8V

2.5V

3.3V

3.3V

5.0V

5.0V

12.0V

24.0V

28.0V

28.0V

60A

60A

60A

60A

60A

40A

60A

40A

25A

12.5A

11A

16A

72W

90W

108W

150W

198W

132W

300W

200W

300W

300W

308W

450W

83%

86%

86.5%

89%

90%

90%

90%

91%

91.5%

91%

91%

93.5%

©2007 TDK Innoveta Inc. iHA Datasheet 040207

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Mechanical Specification:

Unless otherwise specified tolerances are: x.x ± 0.5 mm [x.xx ± 0.02 in.], x.xx +/- 0.25 mm [x.xxx +/- 0.010 in.]

Recommended Hole Pattern:

(top view)

Pin Assignment:

PIN FUNCTION

1

2

Vin (+)

On/Off

3

4

5

6

Case (Omit – optional)

Vin (-)

Vout (-)

Sense (-)

©2007 TDK Innoveta Inc. iHA Datasheet 040207

PIN FUNCTION

7 Trim

8 Sense (+)

9 Vout (+)

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Absolute Maximum Ratings:

Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device.

Characteristic Min Max Unit Notes & Conditions

Continuous Input Voltage

Transient Input Voltage

Isolation Voltage

-0.5

---

---

80

100

1500

Vdc

Vdc

Vdc

100mS max.

Storage Temperature -55 125 °C

Operating Temperature Range (Tc) -40 115* °C

Maximum base plate temperature. Measured at the location specified in the thermal measurement figure.

Flatness 0.006 In.

Bare component side of metal board shall be convex.

•

Engineering estimate

Common Input Characteristics:

Unless otherwise specified, specifications apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.

Characteristic Min Typ Max Unit Notes & Conditions

Operating Input Voltage

Turn-on Voltage

Turn-off Voltage

Hysteresis

Input High Voltage Turn-off

Input High Voltage Turn-on

Hysteresis

Startup Delay Time from application of input voltage

Startup Delay Time from on/off

36

---

30

0.5

---

75

---

---

---

---

48

34.6

32.7

1.9

79

77

2

15

10

---

75

36

---

---

80

---

---

---

---

0.06

Vdc

Vdc

Vdc

Vdc

Vdc

Vdc

Vdc mS mS

A

2 s

Vo = 0 to 0.1*Vo,nom; on/off =on,

Io=Io,max, Tc=25°C

Vo = 0 to 0.1*Vo,nom; Vin = Vi,nom,

Io=Io,max,Tc=25°C

Inrush Transient

* Engineering estimate

Electrical Data:

Input Characteristic

Maximum Input Current

Output Voltage Rise Time

Input Reflected Ripple

Min

---

---

---

---

Typ

---

20

8.7

58

Max

4.5*

---

---

---

Unit

A mS mApp dB

Notes & Conditions

Vin = 0 to Vin,max, Io,max, Vo=Vo,nom

Io=Io,max,Tc=25°C, Vo=0.1 to 0.9*Vo,nom

See input/output ripple measurement figure;

BW = 20 MHz

@120Hz Input Ripple Rejection

* Engineering estimate

©2007 TDK Innoveta Inc. iHA Datasheet 040207

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Electrical Data (continued):

Operating at Tc = 25°C unless otherwise specified

Output Characteristic Min Typ Max Unit Notes & Conditions

3.25 3.3 3.35 Vdc Vin=Vin,nom; Io=Io,max; Output Voltage Initial Setpoint

Output Voltage Tolerance

Efficiency

Line Regulation

Load Regulation

Temperature Regulation

Output Current

3.2

---

---

---

---

0

40.6

---

91.5

2

6

10

---

46

3.4

---

6*

10*

30*

40

60

Vdc

% mV mV mV

A

A

Over all rated input voltage, load, and temperature conditions to end of life

Vin=Vin,nom; Io=Io,max;

Vin=Vin,min to Vin,max

Io=Io,min to Io,max

Tc=Tc,min to Tc,max

At loads less than 25% of Io,max the module will continue to regulate the output voltage, but the output ripple may increase

Vo = 0.9*Vo,nom, Tc<Tc,max Output Current Limiting Threshold

Short Circuit Current

Output Ripple and Noise Voltage

---

---

60

40

---

55

A mVpp

Vo = 0.25V

Measured across one 47uF, one 1uF and one 0.1uF ceramic capacitors – see input/output ripple measurement figure; BW =

20MHz

--- 10 15 mVrms

Output Voltage Adjustment Range

Output Voltage Sense Range

Dynamic Response:

Recovery Time

Transient Voltage

Output Voltage Overshoot during startup

Switching Frequency

Output Over Voltage Protection

External Load Capacitance

50

---

---

---

---

---

---

50

---

---

0.25

100

0

300

4.0

---

110

10

---

---

---

---

---

60000**

%Vo,nom

%Vo,nom mS mV mV kHz

V uF di/dt = 0.1A/uS, Vin=Vin,nom; load step from

50% to 75% of Io,max.

For applications with large step load changes and/or high di/dt load changes, please contact TDK Innoveta for support.

Io=Io,max

Fixed

All line, load, and temperature conditions

Isolation Capacitance

Isolation Resistance

---

10

2000

---

---

--- pF

M

Ω

All line, load, and temperature conditions

All line, load, and temperature conditions

Vref 1.225 V Required for trim calculation

* Engineering Estimate

** Contact TDK Innoveta for applications that require additional capacitance

Caution: The power modules are not internally fused. An external input line normal blow fuse with a maximum value of 10A is required, see the Safety Considerations section of the data sheet.

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Electrical Characteristics:

iHA48040A033V-001 Efficiency iHA48040A033V-001 Power Dissipation

Ta = 25 Deg C.

95

90

85

80

75

70

0 4 8 12 16 20 24

Output Current (A)

28 32 36 40

14

12

10

8

6

4

2

0

0 4 8 12 16 20 24

Output Current (A)

28 32

Ta = 25 Deg C.

36 40

Vin = 36V Vin = 48V Vin = 75V Vin = 36V Vin = 48V Vin = 75V iHA48040A033V-001 Typical Efficiency vs. Output

Current at Ta=25 degrees. iHA48040A033V-001 Typical Power Dissipation vs.

Output current at Ta=25 degrees iHA48040A033V-001 Load Regulation

Ta = 25 Deg C.

3.302

3.3018

3.3016

3.3014

3.3012

3.301

3.3008

3.3006

4 8 12 16 20 24

Output Current (A)

28 32 36 40

Vin = 36V Vin = 48V Vin = 75V iHA48040A033V-001 Typical Output Voltage vs. Load

Current at Ta = 25 degrees iHA48040A033V-001 Typical startup characteristic from on/off at full load. Upper trace - on/off signal, lower trace – output voltage

iHA48040A033V-001 Typical startup characteristic from input voltage application at full load. Upper trace - input voltage, lower trace – output voltage iHA48040A033V-001 Typical transient response.

Load step from 50% to 75% of full load with 0.1A/uS.

Lower trace – output current , upper trace – output voltage

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Electrical Characteristics (continued):

iHA48040A033V-001 Current Limit

Ta = 25 Deg C.

4

3

2

1

0

5 10 45 50 15 20 25 30

Output Current (A)

35

Vin = 36V Vin = 48V

40

Vin = 75V iHA48040A033V-001 Typical Output Current Limit

Characteristics vs. Input Voltage at Ta=25 degrees.

3

2

1

5

4

0

30 35

Input Current Vs. Input Voltage

40 45 50 55

Input Voltage (V)

60 65

Ta = 25 Deg C.

70 75 iHA48040A033V-001 Typical Output Ripple at nominal

Input voltage and full load with external capacitors

47uF+1uF+0.1uF at Ta=25 degrees

Output Voltage Vs. Input Voltage

Ta = 25 Deg C.

4

3

2

1

0

30

Vin decreasing turn-off

32

Vin increasing turn-on

34

Input Voltage (V)

36 38

Io_min = 4.02A

Io_mid = 20.12A

iHA48040A033V-001 Typical Input Current vs. Input

Voltage Characteristics at Ta=25 degrees.

4

3

2

1

0

76

Output Voltage Vs. Input Voltage

Vin decreasing turn-on

78

Input Voltage (V)

Io_max = 40.04A

Vin increasing turn-off iHA48040A033V-001 Typical Output Voltage vs. Input

Voltage Turn-on / Turn-off Characteristics – high voltage at Ta=25 degrees.

80

Io_min = 4.02A

Io_mid = 20.12A

Io_max = 40.04A

iHA48040A033V-001 Typical Output Voltage vs. Input

Voltage Turn-on / Turn-off Characteristics – low voltage at

Ta=25 degrees.

%

Change of Vout

Trim

Down

Resistor

(Kohm)

%

Change of Vout

Trim Up

Resistor

(Kohm)

-3%

-5%

31.33K

18K

+3%

+5%

57.16K

34.57K

-10% 8K +10% 17.63K

e.g. trim up 5%

R up

=





1

3 .

3

.

225

−

2 



⋅

5 %

( 1

+

5 %)

+

1

=

34 .

57 ( k

Ω

) iHA48040A033V-001 Calculated resistor values for output voltage adjustment

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Electrical Characteristics (continued):

1000 10000

100

1000

10

1

100

0

0 10 20 30

% Decrease in Output Voltage,

∆

(%)

40 iHA48040A033V-001 Trim down curve for output voltage adjustment

10

0 2 4 6 8

% Increase in Output Voltage,

∆

(%)

10 iHA48040A033V-001 Trim up curve for output voltage adjustment

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Thermal Performance:

40

30

20

10

25 35 45

NC 0.3 m/s (60 LFM)

55 65 75

Ambient Temperature ( o

C)

85

0.5 m/s (100 LFM)

95

1.0 m/s (200 LFM)

105 115

1.5 m/s (300 LFM) IMS LIMIT iHA48040A033V-001 maximum output current vs. ambient temperature at nominal input voltage for airflow rates natural convection 0.3 m/s (60lfm) to 3.0m/s

(600lfm) with airflow from output to input.

40

30

20

10

25 35 45

NC 0.3 m/s (60 LFM)

1.5 m/s (300 LFM)

55 65 75

Ambient Temperature ( o

C)

85

0.5 m/s (100 LFM)

2.0 m/s (400 LFM)

95 105

1.0 m/s (200 LFM)

IMS LIMIT iHA48040A033V-001 maximum output current vs. ambient temperature at nominal input voltage for airflow rates natural convection 0.3 m/s (60lfm) to 3.0m/s

(600lfm with airflow from input to output.

115

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0 0.5

1 1.5

Airflow, m/s

1/4" HS 1/2" HS

2 2.5

NO HS 1" HS iHA48040A033V-001 Case to Ambient Thermal

Resistance vs. Airflow rate

3

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Thermal Performance (continued):

40 40

35 35

30 30

25

25

20

20

15

15

10

10

5

5

0

107 108 109 110 111

Temperature ( o C)

1/2" HS

112 113

1/4" HS 1" HS iHA48040A033V-001 with heatsink maximum Output

Current vs. maximum allowable IMS Temperature at nominal input voltage with airflow from output to input.

114

0

105 106 107

Temperature ( o

C)

108 109

1/4" HS 1/2" HS 1" HS iHA48040A033V-001 with heatsink maximum Output Current vs. maximum allowable IMS Temperature at nominal input voltage with airflow from input to output.

Example: : To estimate the maximum temperature at which an iHA48040A033V* Module can provide full load with 0.5 m/s (100 lfm) of airflow, at nominal line (48V) using a 1/2” heatsink with the best orientation, one must first look at the Power Dissipation vs. input voltage and Output

Current plot. From this plot, it can be seen that the iHA dissipates 11.5W* of power (P d

) at full load. From the Case to Ambient Thermal Resistance vs. Airflow Rate curve, R ca

is 2.4

o

C/W. From the Output Current vs. maximum allowable IMS Temperature plot for the best orientation heatsink application, it can be seen that the maximum allowable IMS temperature at the thermal measurement location (T c

) is 112 o

C. From the governing equation for the overall thermal resistance of the module, T c

- T a

= P d

x R ca to be 84 o

C.

, the maximum ambient temperature (T a

) is determined

Complete thermal de-rating and maximum IMS temperature curves without or with a heatsink

((¼”, ½” or 1”) are available upon request from TDK Innoveta.

* Please note that the Power Dissipation curve is for Tamb = 25 o

C. At higher temperatures, power dissipation may be higher. Consult with TDK Innoveta if operating at high ambient temperatures.

The thermal curves provided are based upon measurements made in TDK Innoveta’s experimental test setup that is described in the Thermal Management section. Due to the large number of variables in system design, TDK Innoveta recommends that the user verify the module’s thermal performance in the end application. The critical component should be thermo-coupled and monitored, and should not exceed the temperature limit specified in the derating curve above. It is critical that the thermocouple be mounted in a manner that gives direct thermal contact otherwise significant measurement errors may result.

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Thermal Management:

An important part of the overall system design process is thermal management; thermal design must be considered at all levels to ensure good reliability and lifetime of the final system. Superior thermal design and the ability to operate in severe application environments are key elements of a robust, reliable power module.

A finite amount of heat must be dissipated from the power module to the surrounding environment. This heat is transferred by the three modes of heat transfer: convection, conduction and radiation. While all three modes of heat transfer are present in every application, convection is the dominant mode of heat transfer in most applications.

However, to ensure adequate cooling and proper operation, all three modes should be considered in a final system configuration.

The open frame design of the power module provides an air path to individual components. This air path improves convection cooling to the surrounding environment, which reduces areas of heat concentration and resulting hot spots.

Test Setup: The thermal performance data of the power module is based upon measurements obtained from a wind tunnel test with the setup shown in the wind tunnel figure. This thermal test setup replicates the typical thermal environments encountered in most modern electronic systems with distributed power architectures. The electronic equipment in networking, telecom, wireless, and advanced computer systems operates in similar environments and utilizes vertically mounted (PCBs) or circuit cards in cabinet racks.

The power module is mounted on a 0.062 inch thick, 6 layer, 2oz/layer PCB and is vertically oriented within the wind tunnel.

Power is routed on the internal layers of the

PCB. The outer copper layers are thermally decoupled from the converter to better simulate the customer’s application. This also results in a more conservative derating.

The cross section of the airflow passage is rectangular with the spacing between the top of the module and a parallel facing PCB kept at a constant (0.5 in). The power module’s orientation with respect to the airflow direction can have a significant impact on the unit’s thermal performance.

AIRFLOW

Module

Centerline

76 (3.0)

F

L

O

W

A

I

R

Air Velocity and Ambient Temperature

Measurement Location

Air Passage

Centerline

Wind Tunnel Test Setup Figure

Dimensions are in millimeters (inches)

Thermal Derating: For proper application of the power module in a given thermal environment, output current derating curves are provided as a design guideline in the

Thermal Performance section for the power module of interest. The module temperature should be measured in the final system configuration to ensure proper thermal management of the power module. For thermal performance verification, the module temperature should be measured at the location indicated in the thermal measurement location figure in the Thermal

Performance section for the power module of interest. In all conditions, the power module should be operated below the maximum operating temperature shown on the derating curve. For improved design margins and enhanced system reliability, the power module may be operated at temperatures below the maximum rated operating temperature.

Adjacent PCB

12.7

(0.50)

©2007 TDK Innoveta Inc. iHA Datasheet 040207

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Heat transfer by convection can be enhanced by increasing the airflow rate that the power module experiences. The maximum output current of the power module is a function of ambient temperature

(T

AMB

) and airflow rate as shown in the thermal performance figures on the thermal performance page for the power module of interest. The curves in the figures are shown for natural convection through 3 m/s (600 ft/min). The data for the natural convection condition has been collected at 0.3 m/s (60 ft/min) of airflow which is the typical airflow generated by other heat dissipating components in many of the systems that these types of modules are used in. In the final system configurations, the airflow rate for the natural convection condition can vary due to temperature gradients from other heat dissipating components.

Heatsink Usage: For applications with demanding environmental requirements, such as higher ambient temperatures or higher power dissipation, the thermal performance of the power module can be improved by attaching a heatsink or cold plate. The iHx platform is designed with a base plate with four M3 X 0.5 throughthreaded mounting fillings for attaching a heatsink or cold plate. The addition of a heatsink can reduce the airflow requirement and ensure consistent operation and extended reliability of the system. With improved thermal performance, more power can be delivered at a given environmental condition.

Standard heatsink kits are available from

TDK Innoveta for vertical module mounting in two different orientations (longitudinal – perpendicular to the direction of the pins and transverse – parallel to the direction of the pins). The heatsink kit contains four M3 x

0.5 steel mounting screws and a precut thermal interface pad for improved thermal resistance between the power module and the heatsink. The screws should be installed using a torque-limiting driver set between

0.35 and 0.55 Nm (3-5 in-lbs).

During heatsink assembly, the base-plate to heatsink interface must be carefully managed. A thermal pad may be required to reduce mechanical-assembly-related stresses and improve the thermal connection. Please contact TDK Innoveta

Engineering for recommendations on this subject.

The system designer must use an accurate estimate or actual measurement of the internal airflow rate and temperature when doing the heatsink thermal analysis. For each application, a review of the heatsink fin orientation should be completed to verify proper fin alignment with airflow direction to maximize the heatsink effectiveness. With respect to TDK Innoveta standard heatsinks, contact TDK Innoveta for the latest performance data.

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13/17

Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Operating Information:

Over-Current Protection: The power modules have current limit protection to protect the module during output overload and short circuit conditions. During overload conditions, the power modules may protect themselves by entering a hiccup current limit mode. The modules will operate normally once the output current returns to the specified operating range. There is a typical delay of 2mS from the time an overload condition appears at the module output until the hiccup mode will occur.

It is recommended that the power module be kept off for at least 100mS each time it is turned off.

The standard on/off logic is positive logic. The power module will turn on if terminal 2 is left open and will be off if terminal 2 is connected to terminal 4. An optional negative logic is available. The power module will turn on if terminal 2 is connected to terminal 4, and it will be off if terminal 2 is left open.

Vin (+)

Output Over-Voltage Protection: The power modules have a control circuit, independent of the primary control loop that reduces the risk of over voltage appearing at the output of the power module during a fault condition. If there is a fault in the primary regulation loop, the over voltage protection circuitry will cause the power module to shut down. The module remains off unless either the input power is recycled or the on/off switch is toggled.

The iHA Veta



family also offers a hiccup over-voltage protection once it detects that the output voltage has reached the level indicated in the Electrical Data section for the power module of interest. When the condition causing the over-voltage is corrected, the module will operate normally.

Thermal Protection: When the power modules exceed the maximum operating temperature, the modules may turn-off to safeguard the power unit against thermal damage. The module will auto restart as the unit is cooled below the over temperature threshold.

Remote On/Off: - The power modules have an internal remote on/off circuit. The user must supply an open-collector or compatible switch between the Vin(-) pin and the on/off pin. The maximum voltage generated by the power module at the on/off terminal is 15V.

The maximum allowable leakage current of the switch is 50uA. The switch must be capable of maintaining a low signal Von/off <

1.2V while sinking 1mA.

On/ Off

Vin(-)

An On/Off Control Circuit

Output Voltage Adjustment: The output voltage of the power module may be adjusted by using an external resistor connected between the Vout trim terminal (pin 7) and either the Sense (+) or Sense (-) terminal. If the output voltage adjustment feature is not used, pin 7 should be left open. Care should be taken to avoid injecting noise into the power module’s trim pin. A small 0.01uF capacitor between the power module’s trim pin and Sense (-) pin may help avoid this.

Vout(+)

Sense(+)

Trim

Sense(-)

Vout(-)

Rdown

Circuit to decrease output voltage

With a resistor between the trim and Sense (-) terminals, the output voltage is adjusted down. To adjust the output voltage down a

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series percentage of Vout (%Vo) from Vo,nom, the trim resistor should be chosen according to the following equation: where

R

∆ down down

=

=

(

V

100 %

∆ down nom

−

V

V nom

−

2 ) desired

k Ω

⋅

100 % trimmed up, the maximum output current must be decreased to maintain the maximum rated power of the module.

As the output voltage is trimmed, the output over-voltage set point is not adjusted.

Trimming the output voltage too high may cause the output over voltage protection circuit to be triggered.

Remote Sense: The power modules feature

The current limit set point does not increase as the module is trimmed down, so the available output power is reduced.

Vout(+)

Sense(+)

Trim

Sense(-)

Vout(-)

Rup

Circuit to increase output voltage

With a resistor between the trim and sense (+) terminals, the output voltage is adjusted up.

To adjust the output voltage up a percentage of Vout (%Vo) from Vo,nom the trim resistor should be chosen according to the following equation:

R up

=









V

V nom ref

−

2





 

∆

⋅

( up

1

+ ∆ up

)

+

1

k

Ω remote sense to compensate for the effect of output distribution drops. The output voltage sense range defines the maximum voltage allowed between the output power terminals and output sense terminals, and it is found on the electrical data page for the power module of interest. If the remote sense feature is not being used, the Sense(+) terminal should be connected to the Vo(+) terminal and the

Sense (-) terminal should be connected to the

Vo(-) terminal. The output voltage at the Vo(+) and Vo(-) terminals can be increased by either the remote sense or the output voltage adjustment feature. The maximum voltage increase allowed is the larger of the remote sense range or the output voltage adjustment range; it is not the sum of both.

As the output voltage increases due to the use of the remote sense, the maximum output current must be decreased for the power module to remain below its maximum power rating.

EMC Considerations: TDK Innoveta power modules are designed for use in a wide variety of systems and applications. For where

∆ up

=

V desired

−

V nom

V nom

⋅

100 % and assistance with designing for EMC compliance, please contact TDK Innoveta technical support.

Input Impedance: The source impedance of

The value of Vref is found in the Electrical

Data section for the power module of interest.

Trim up and trim down curves are found in the

Electrical Characteristics section for the power module of interest.

The maximum power available from the power module is fixed. As the output voltage is the power feeding the DC/DC converter module will interact with the DC/DC converter.

To minimize the interaction, a 200-1000uF input electrolytic capacitor should be present.

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series

Input/Output Ripple and Noise Measurements:

Battery

1

12uH

2

220uF esr<0.1

100KHz

+

C in esr<0.7

100KHz

Vinput

-

+

Voutput

-

Cext

RLoad

Ground Plane

The input reflected ripple is measured with a current probe and oscilloscope. The ripple current is the current through the

12uH inductor. The capacitor Cin shall be at least 100uF/100V. One 470uF or two 220uF/100V capacitors in parallel are recommended.

The output ripple measurement is made approximately 9 cm (3.5 in.) from the power module using an oscilloscope and

BNC socket. The capacitor Cext is located about 5 cm (2 in.) from the power module; its value varies from code to code and is found on the electrical data page for the power module of interest under the ripple & noise voltage specification in the Notes & Conditions column.

Safety Considerations:

60Vdc, the output can be considered SELV only if the following conditions are met:

All TDK Innoveta products are certified to regulatory standards by an independent,

1) The input source is isolated from the ac mains by reinforced insulation.

Certified Administrative Agency laboratory.

UL 1950, 3 rd

edition (US & Canada), and

2) The input terminal pins are not accessible. other global certifications are typically obtained for each product platform.

3) One pole of the input and one pole of the output are grounded or both are

Various safety agency approvals are pending kept floating.

4) Single fault testing is performed on on the iHx product family. For safety agency approval of the system in which the DC-DC the end system to ensure that under a single fault, hazardous voltages do power module is installed, the power module must be installed in compliance with the not appear at the module output. creepage and clearance requirements of the safety agency. The isolation is basic

To preserve maximum flexibility, the power modules are not internally fused. An external insulation. For applications requiring basic input line normal blow fuse with the maximum rating stipulated in the Electrical Data section insulation, care must be taken to maintain minimum creepage and clearance distances is required by safety agencies. A lower value fuse can be selected based upon the when routing traces near the power module. maximum dc input current and maximum inrush energy of the power module

As part of the production process, the power modules are hi-pot tested from primary and

Reliability:

secondary at a test voltage of 1500Vdc. The case pin is considered a primary pin for the purpose of hi-pot testing.

When the supply to the DC-DC converter is less than 60Vdc, the power module meets all of the requirements for SELV. If the input voltage is a hazardous voltage that exceeds

The power modules are designed using TDK

Innoveta’s stringent design guidelines for component derating, product qualification, and design reviews. Early failures are screened out by both burn-in and an automated final test. The MTBF is calculated to be greater

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Data Sheet: Veta  iHA48040A033V*, 3.3V/40A Output Half Brick Series than 2M hours using the Telcordia TR-332 calculation method.

Improper handling or cleaning processes can adversely affect the appearance, testability, and reliability of the power modules. Contact

TDK Innoveta technical support for guidance regarding proper handling, cleaning, and soldering of TDK Innoveta’s power modules.

Quality:

TDK Innoveta’s product development process incorporates advanced quality planning tools such as FMEA and Cpk analysis to ensure are assembled at ISO certified assembly plants.

Warranty:

TDK Innoveta’s comprehensive line of power solutions includes efficient, high-density DC-

DC converters. TDK Innoveta offers a threeyear limited warranty. Complete warranty information is listed on our web site or is available upon request from TDK Innoveta. designs are robust and reliable. All products

TDK Innoveta Inc.

3320 Matrix Drive, Suite 100

Richardson, Texas 75082

Phone (877) 498-0099 Toll Free

(469) 916-4747

Fax (877) 498-0143 Toll Free

(214) 239-3101 [email protected]

http://www.tdkinnoveta.com/

©2007 TDK Innoveta Inc. iHA Datasheet 040207

Information furnished by TDK Innoveta is believed to be accurate and reliable. However, TDK

Innoveta assumes no responsibility for its use, nor for any infringement of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TDK Innoveta. TDK Innoveta components are not designed to be used in applications, such as life support systems, wherein failure or malfunction could result in injury or death. All sales are subject to TDK Innoveta’s Terms and Conditions of Sale, which are available upon request. Specifications are subject to change without notice. TDK logo is a trademark or registered trademark of TDK Corporation.

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