datasheet for SA50CE by Apex Microtechnology

datasheet for SA50CE by Apex Microtechnology
SA50CE
SA50CE
SA50CE
H-Bridge Motor Driver/Amplifiers
FEATURES
• LOW COST COMPLETE H-BRIDGE
• SELF-CONTAINED SMART LOWSIDE/HIGHSIDE DRIVE
CIRCUITRY
• SINGLE ENDED SUPPLY OPERATION
• WIDE SUPPLY RANGE: UP TO 80V
• 5A CONTINUOUS OUTPUT
• HERMETIC SEALED PACKAGE
• HIGH EFFICIENCY: 95% TYPICAL
• FOUR QUADRANT OPERATION, TORQUE
CONTROL CAPABILITY
• INTERNAL PWM GENERATION
8-PIN TO-3
PACKAGE STYLE CE
TYPICAL APPLICATIONS
APPLICATIONS
•
•
•
•
•
•
+VS
BRUSH TYPE MOTOR CONTROL
CLASS D SWITCHMODE AMPLIFIER
REACTIVE LOADS
MAGNETIC COILS (MRI)
ACTIVE MAGNETIC BEARING
VIBRATION CANCELLING
Vcc
AUDIO
INPUT
SA50CE
SPEAKER
DESCRIPTION
The SA50CE is a pulse width modulation ampliier that can
continuously supply 5A to the load. The full bridge ampliier
can be operated over a wide range of supply voltages. All of
the drive/control circuitry for the lowside and high side switches
are internal to the hybrid. The PWM circuitry is internal as well,
leaving the user to only provide an analog signal for the motor speed and direction, or audio signal for switchmode audio
ampliication. The SA50CE is packaged in a space efficient
isolated 8-pin TO-3 that can be directly connected to a heatsink.
BLOCK DIAGRAM
GND
+VS
Vcc
ANALOG
INPUT
SA50CE
DC MOTOR
+VS
GND
(LOAD)
B
EXTERNAL CONNECTIONS
GND
A
INPUT
8
VCC
(+12V)
45KHz
PWM
GENERATOR
INPUT
7
6
VCC
RSENSE A
5
TOP VIEW
H-BRIDGE
DRIVE
CIRCUITRY
RSENSE A
RSENSE B
(CURRENT)
4
1
RSENSE B
BOUT
GND
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SA50CEU
2
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
AOUT
3
+VS
OCT 2012
1
SA50CEU REVE
SA50CE
ABSOLUTE MAXIMUM RATINGS
80V5
7A
16V
72W1
350°C
175°C
–65 to +150°C
–65 to +125°C
+1V to Vcc – 1.5 Vdc
SUPPLY VOLTAGE, +VS
OUTPUT CURRENT, peak
LOGIC SUPPLY VOLTAGE, Vcc
POWER DISSIPATION, internal
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction3
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
INPUT VOLTAGE
SPECIFICATIONS
TEST CONDITIONS2
PARAMETER
INPUT
ANALOG INPUT VOLTAGES
MOTOR A, B = 50% Duty Cycle
MOTOR A = 100% Duty Cycle High6
MOTOR B = 100% Duty Cycle High6
OUTPUT
Vds (ON) VOLTAGE, each MOSFET
TOTAL Ron, both MOSFETs
EFFICIENCY, 5A OUTPUT
SWITCHING FREQUENCY
CURRENT, continuous
CURRENT, peak
SWITCHING CHARACTERISTICS4
RISE TIME
FALL TIME
DEAD TIME
POWER SUPPLY
+VS VOLTAGE5
Vcc VOLTAGE
Vcc CURRENT
MIN
TYP
MAX
UNITS
Vcc = 9.5V to 15V
VCC /2
2VCC /3
VCC /3
Ids = 5A
+VS = 80V
40
5
7
t = 100 m-sec
+VS = 28V, Vcc = 12V, Ic =2A
1.0
0.4
95
45
1.3
36
170
100
54
250
ns
ns
ns
80
15
30
V
V
mA
+85
°C/W
°C/W
°C
+VS I = Load I
9.5
V
V
V
Vcc = 12Vdc
12
20
Full temp range, for each transistor
Full temperature range
2.0
30
50
Vdc
Ω
%
kHz
A
A
3
THERMAL
RESISTANCE, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
–40
NOTES: 1. Each of the two active output transistors can dissipate 36W. This is an output FET rating only; normal operation at worst case
conditions and maximum duty cycle only causes 19 watts internal heat generation in each active output FET. Use 40 watts
maximum to size heatsink.
2. Unless otherwise noted: TC = 25°C, Vcc = 12Vdc.
3. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to
achieve high MTTF. For guidance, refer to the heatsink data sheet.
4. Guaranteed but not tested.
5. Derate linearly to 70V at – 40°C from TC = +25°C.
CAUTION
The SA50CE is constructed from MOSFET transistors. ESD handling procedures must be observed.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
WARNING—AMPLIFIER PROTECTION
The SA50CE contains an internal logic chip that turns on
and turns off output MOSFET drivers at a certain sequence.
Noises or oscillation caused by external wiring inductance,
lack of proper power supply bypass capacitors, ground, supply and local internal loops, may be fed back to this logic chip
and cause it to turn on one or more MOSFET drivers at the
wrong time, thus destroying the SA50CE. A well laid out PC
2
board with low impedance copper ground plane and excellent
bypassing is necessary for the SA50CE to function properly.
A low ESR high frequency bypass capacitor, such as a 0.1 µf
100V X7R ceramic, or better, should be mounted as close to
the Vs and ground pins as possible to avoid radiation of high
frequency transients on the power supply wiring. The Apex Microtechnology EK-SA50CE evaluation board is recommended
for fast and easy breadboarding of circuits using the SA50CE.
SA50CEU
SA50CE
INPUT CURRENT VS TEMP
POWER DERATING
SINGLE FET POWER CAPABILITY
35
30
25
20
15 MAXIMUM INTERNAL
POWER @ 5A, 80V
10
5
0
-50 -25 0 25 50 75 100 125 150 175
TEMPERATURE, °C
100
0.95
98
0.85
96
0.75
0.65
0.55
0.45
DRAIN-TO-SOURCE CAP, (pF)
OUTPUT RESISTANCE, (NORMALIZED)
1.5
1
0.5
0
–60
–20
20
60 100 140 180
JUNCTION TEMPERATURE (°C)
IO = 5A
0
90% DUTY CYCLE
L/R > 75µ-sec
10 20 30 40 50 60 70 80
SUPPLY VOLTAGE, VS (V)
EFFICIENCY vs. LOAD CURRENT
100
98
400
300
200
VS = 8
0V
VS =
60V
96
94
V =
S
40V
92
V
S
90
88
100
0
IO = 4A
88
84
500
2
IO = 3A
90
0.25
–40 –20 0 20 40 60 80 100 120
CASE TEMPERATURE, (°C)
H-BRIDGE FET CAPACITANCE
IO = 2A
92
86
OUTPUT RESISTANCE DRIFT
2.5
IO = 1A
94
0.35
EFFICIENCY, (%)
POWER, WATTS
40
INPUT BIAS CURRENT, (µA)
45
EFFICIENCY vs. POWER SUPPLY VOLTAGE
1.05
EFFICIENCY, (%)
50
2
5
10 20
50 100
DRAIN-TO-SOURCE VOLTAGE, (V)
0V
90% DUTY CYCLE
L/R > 75µ-sec
96
1
=2
1
2
3
4
LOAD CURRENT, (A)
5
VOLTAGE DROP (V), BOTH FETs
17
=
4
J
3
TJ
=
TJ
2
C
5°
T
VOLTAGE DROP, (V)
5°
C
5
12
5°C
=7
T J=
C
25°
1
0
0
SA50CEU
1
2
3
4
OUTPUT CURRENT, (A)
5
3
SA50CE
TYPICAL SYSTEM OPERATION
GENERAL
Please read Application Note 30 on "PWM Basics".
Refer to Application Note 1 "General Operating Considerations" for helpful information regarding power
supplies, heat sinking and mounting. Visit www.apexanalog.com for design tools that help automate pwm
ilter design and heat sink selection. The "Application
Notes" and "Technical Seminar" sections contain a
wealth of information on speciic types of applications.
Information on package outlines, heat sinks, mounting
hardware and other accessories are located in the
"Packages and Accessories" section. Evaluation Kits
are available for most Apex Microtechnology product
models, consult the "Evaluation Kit" section for details.
For the most current version of all Apex Microtechnology product data sheets, visit www.apexanalog.com.
6
VCC - is the low voltage supply for powering internal
logic and drivers for the lowside and highside
MOSFETS. The supplies for the highside drivers
are derived from this voltage.
VS - is the higher voltage H-bridge supply. The MOSFETS obtain the output current from this supply
pin. Proper by-passing to GND with sufficient
capacitance to suppress any voltage transients,
and to ensure removing any drooping during
switching, should be done as close to the pins
on the hybrid as possible.
A OUT - is the output pin for one half of the bridge. Increasing the input voltage causes increasing duty cycle at
this output.
B OUT - is the output pin for the other half of the bridge.
Decreasing the input voltage causes increasing duty
cycles at this point.
RSENSE A - This is the connection for the bottom of the A
half bridge. This can have a sense resistor connected
to the VS return ground for current limit sensing, or can
be connected directly to ground. The maximum voltage
on this pin is ±2 volts with respect to GND.
GND - is the return connection for the input logic and VCC.
RSENSE B - This is the connection for the bottom of the B
half bridge. This can have a sense resistor connection
to the VS return ground for current limit sensing, or can
be connected directly to ground. The maximum voltage
on this pin is ±2 volts with respect to GND.
INPUT - is an analog input for controlling the PWM pulse width
of the bridge. A voltage higher than VCC /2 will produce
greater than 50% duty cycle pulses out of A OUT. A
voltage lower than VCC /2 will produce greater than 50%
duty cycle pulses out of B OUT.
4
+VS
Vcc
MOTOR A
22μF
3
SNUBBER NETWORK
4
SA50CE
8
7
INPUT
MOTOR B
2
MOTOR
100
2W
1000pF
200V
MYLAR
GND
RSENSE A
RSENSE B
5
1
6.8μF
100V
POLY
SENSE
RESISTORS
0.1
R
R
PIN DESCRIPTION
+VS
+12V
GND
NO OUTPUT
SWITCHING
CURRENT
+12V
RIN
+12V
RDIVIDE
(VCC÷2)
RDIVIDE
ANALOG
INPUT
Rf
RDIVIDE = 2X Rf
RIN
CURRENT CONTROL
This is a diagram of a typical application of the SA50CE.
The design Vcc voltage is +12 volts. VCC is internally bypassed
with a good low ESR ceramic capacitor. A higher ESR bulk
capacitor, such as a tantalum electrolytic, may be used externally in parallel. The analog input can be an analog speed
control voltage from a potentiometer, other analog circuitry or
by microprocessor and a D/A converter. This analog input gets
pulled by the current control circuitry in the proper direction
to reduce the current low in the bridge if it gets too high. The
gain of the current control ampliier will have to be set to obtain
the proper amount of current limiting required by the system.
Current sensing is done in this case by a 0.1Ω sense resistor
to sense the current from both legs of the bridge separately. It
is important to make the high current traces as big as possible
to keep inductance down. The storage capacitor connected to
the VS and the hybrid GND should be large enough to provide
the high energy pulse without the voltage sagging too far. A
low ESR capacitor will be required. Mount capacitor as close
to the hybrid as possible. The connection between GND and
the VS return should not be carrying any motor current. The
sense resistor signal is common mode iltered as necessary
to feed the limiting circuitry. This application will allow full four
quadrant torque control for a closed loop servo system.
A snubber network is usually required, due to the inductance
in the power loop. It is important to design the snubber network
to suppress any positive spikes above +VS and negative spikes
below –2V with respect to pin 7 (GND).
SA50CEU
SA50CE
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact [email protected]
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To ind the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any speciications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not
extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
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SA50CEU
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OCT 20125
SA50CEU REVE
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