datasheet for SA03 by Apex Microtechnology

datasheet for SA03 by Apex Microtechnology
SA03
SA03
SA03
Pulse Width Modulation Amplifier
FEATURES
•
•
•
•
•
•
WIDE SUPPLY RANGE—16-100V
30A CONTINUOUS TO 60°C case
3 PROTECTION CIRCUITS
ANALOG OR DIGITAL INPUTS
SYNCHRONIZED OR EXTERNAL OSCILLATOR
FLEXIBLE FREQUENCY CONTROL
SA03
∆
USA
TE9493
11
BeO
APPLICATIONS
•
•
•
•
•
•
MOTORS TO 4HP
REACTIVE LOADS
LOW FREQUENCY SONAR
LARGE PIEZO ELEMENTS
OFF-LINE DRIVERS
C-D WELD CONTROLLER
12-PIN POWER DIP
PACKAGE STYLE CR
EXTERNAL CONNECTIONS
ISENSE A
DESCRIPTION
The SA03 is a pulse width ampliier that can supply 3000W
to the load. An internal 45kHz oscillator requires no external
components. The clock input stage divides the oscillator frequency by two, which provides the basic switching of 22.5 kHz.
External oscillators may also be used to lower the switching
frequency or to synchronize multiple ampliiers. Current sensing
is provided for each half of the bridge giving amplitude and
direction data. A shutdown input turns off all four drivers of the
H bridge output.A high side current limit and the programmable
low side current limit protect the ampliier from shorts to supply or ground in addition to load shorts. The H bridge output
MOSFETs are protected from thermal overloads by directly
sensing the temperature of the die.The 12-pin hermetic MO-127
power package occupies only 3 square inches of board space.
CLK IN
CLK OUT
+PWM
1
12
2
11
–PWM/RAMP
4
GND
3
TOP
VIEW
A OUT
* VCC
10
*
9
5
8
6
7
+VS
B OUT
I SENSE B
ILIM/SHDN
Case tied to pin 5. Allow no current in case. Bypassing of supplies
is required. Package is Apex MO-127 (STD). See Outline
Dimensions/Packages in Apex data book.
If +PWM > RAMP/–PWM then A OUT > B OUT.
BLOCK DIAGRAM AND TYPICAL APPLICATION
* See text.
Vcc
10
3
+VS
PWM
4
–PWM/RAMP
9
CURRENT
LIMIT
+PWM
470pF
56K
B OUT
OUTPUT
DRIVERS
8
2
OSC
÷2
1K
I SENSE A
12
SHUTDOWN
CONTROL
CLK IN
6
1
ILIM/SHDN
5
5K
.01µF
RSENSE
1K
7
GND
CONTROL
SIGNAL
MOTOR
11
A OUT
CLK OUT
I SENSE B
RSENSE
5V
5V
www.apexanalog.com
SA03U
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OCT 2012
1
SA03U REVK
SA03
SUPPLY VOLTAGE, +VS
SUPPLY VOLTAGE, VCC
POWER DISSIPATION, internal
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction2
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
INPUT VOLTAGE, +PWM
INPUT VOLTAGE, –PWM
INPUT VOLTAGE, ILIM
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PARAMETER
TEST CONDITIONS2
MIN
IOUT ≤ 1mA
IOUT ≤ 1mA
4.8
0
44
100V
16V
300W
350°C
150°C
–65 to +150°C
–55 to +125°C
0 to +11V
0 to +11V
0 to +10V
TYP
MAX
UNITS
5.3
.4
46
V
V
kHz
V
V
V
V
CLOCK (CLK)
CLK OUT, high level4
CLK OUT, low level4
FREQUENCY
RAMP, center voltage
RAMP, P-P voltage
CLK IN, low level4
CLK IN, high level4
45
5
4
0
3.7
.9
5.4
OUTPUT
TOTAL RON
EFFICIENCY, 10A output
SWITCHING FREQUENCY
CURRENT, continuous4
CURRENT, peak4
.16
VS = 100V
OSC in ÷ 2
60°C case
22
30
40
97
22.5
23
Ω
%
kHz
A
A
100
16
80
50
50
V
V
mA
mA
mA
110
100
mV
nA
.83
°C/W
°C/W
°C
POWER SUPPLY
VOLTAGE, VS
VOLTAGE, VCC
CURRENT, VCC
CURRENT, VCC, shutdown
CURRENT, VS
Full temperature range
Full temperature range
IOUT = 0
165
14
60
15
No Load
ILIM/SHUTDOWN
TRIP POINT
INPUT CURRENT
90
THERMAL3
RESISTANCE, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
NOTES: 1.
2.
3.
4.
5.
CAUTION
2
Full temperature range, for each die
Full temperature range
Meets full range speciications
12
–25
+85
Each of the two active output transistors can dissipate 150W.
Unless otherwise noted: TC = 25°C, VS, VCC at typical speciication.
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.
Guaranteed but not tested.
If 100% duty cycle is not required VS(MIN) = 0V.
The SA03 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.
SA03U
SA03
0
EACH ACTIVE
OUTPUT TRANSISTOR
0
50
75
100
25
CASE TEMPERATURE, (C)
98
97
96
REVERSE DIODE
CASE TEMPERATURE
1
8
7
6
5
0.8
1.0
1.2
1.4
1.6
0.6
SOURCE TO DRAIN DIODE VOLTAGE
DUTY CYCLE, (%)
CONTINUOUS AMPS
20
2
–55C
5
–25C
10
15
20
25
OUTPUT CURRENT, (A)
30
60
40
Vcc QUIESCENT CURRENT
115
Vcc = 15V
F = 22.5 kHz
110
105
NORMAL
OPERATION
100
95
90
SHUTDOWN
OPERATION
85
–50 –25 0
25 50 75 100 125
CASE TEMPERATURE, (C)
SA03U
0
150
NORMALIZED Vs QUIESCENT CURRENT, (%)
50
75
100
125
CASE TEMPERATURE, (C)
25 50 75 100 125
–50 –25 0
CASE TEMPERATURE, (C)
25C
A OUT
16
25
98.0
4
20
18
98.5
125C
B OUT
22
99.0
100C
6
80
24
100
99.5
60C
DUTY CYCLE VS ANALOG INPUT
26
100.5
85C
100
28
80
8
0
0
CONTINUOUS OUTPUT
101.0
TOTAL VOLTAGE DROP
10
2
101.5
10K
100K
1M
CLOCK LOAD RESISTANCE, ( )
2
30
NORMALIZED Vcc QUIESCENT CURRENT, (%)
F NOMINAL = 45kHz
95
125
10
9
7
6
5
4
3
NORMALIZED FREQUENCY, (%)
50
99
3
180
4
5
6
ANALOG INPUT, (V)
7
Vs QUIESCENT VS VOLTAGE
160
140
120
–55C
100
125C
80
60
40
20
0
20
40
60
Vs, (V)
80
100
NORMALIZED Vcc QUIESCENT CURRENT, (%)
75
102.0
NORMALIZED Vs QUIESCENT CURRENT, (%)
100
3
FLYBACK CURRENT, Isd (A)
NORMALIZED FREQUENCY, (%)
125
25
CLOCK FREQUENCY OVER TEMP
CLOCK LOADING
100
TOTAL VOLTAGE DROP, (V)
INTERNAL POWER DISSIPATION, (W)
POWER DERATING
150
Vcc QUIESCENT CURRENT
100
95
90
85
80
75
5
10
15
20
25
SWITCHING FREQUENCY, F (kHz)
Vs QUIESCENT VS FREQUENCY
100
Vs = 60V, NO LOAD
90
80
70
60
50
40
5
10
15
20
25
SWITCHING FREQUENCY, F (kHz)
3
SA03
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; heat sink selection; Apex
Microtechnology’s complete Application Notes library;Technical
Seminar Workbook; and Evaluation Kits.
CLOCK CIRCUIT AND RAMP GENERATOR
The clock frequency is internally set to a frequency of approximately 45kHz. The CLK OUT pin will normally be tied
to the CLK IN pin. The clock is divided by two and applied to
an RC network which produces a ramp signal at the –PWM/
RAMP pin. An external clock signal can be applied to the CLK
IN pin for synchronization purposes. If a clock frequency lower
than 45kHz is chosen an external capacitor must be tied to the
–PWM/RAMP pin. This capacitor, which parallels an internal
capacitor, must be selected so that the ramp oscillates 4 volts
p-p with the lower peak 3 volts above ground.
PWM INPUTS
The full bridge driver may be accessed via the pwm input
comparator. When +PWM > -PWM then A OUT > B OUT. A
motion control processor which generates the pwm signal can
drive these pins with signals referenced to GND.
PROTECTION CIRCUITS
In addition to the externally programmable current limit there
is also a ixed internal current limit which senses only the high
side current. It is nominally set to 140% of the continuous
rated output current. Should either of the outputs be shorted
to ground the high side current limit will latch off the output
transistors. Also, the temperature of the output transistors is
continually monitored. Should a fault condition occur which
raises the temperature of the output transistors to 165°C
the thermal protection circuit will activate and also latch off
the output transistors. In either case, it will be necessary to
remove the fault condition and recycle power to VCC and +VS
to restart the circuit.
CURRENT LIMIT
There are two load current sensing pins, I SENSE A and I
SENSE B. The two pins can be shorted in the voltage mode
connection but both must be used in the current mode connection (see igures A and B). It is recommended that RLIMIT
resistors be non-inductive. Load current lows in the I SENSE
pins. To avoid errors
due to lead lengths I SENSE A
connect the I LIMIT/
SHDN pin directly
R LIMIT
to the RLIMIT resis- I SENSE B
tors (through the
1K SHUTDOWN
ilter network and
I LIMIT/SHDN R
SIGNAL
FILTER
shutdown divider resistor) and connect
R
SHDN
C FILTER
the RLIMIT resistors
directly to the GND FIGURE A. CURRENT LIMIT WITH
pin.
SHUTDOWN VOLTAGE MODE.
4
I SENSE A
Switching noise spikes will invariably be found at the I SENSE
pins. The noise spikes could trip
R LIMIT
the current limit threshold which
I SENSE B
is only 100 mV. RFILTER and CFIL1K
should be adjusted so as to
TER
reduce the switching noise well
R LIMIT
below 100 mV to prevent false
current limiting.
SHUTDOWN
I LIMIT/SHDN R
The sum of the
SIGNAL
FILTER
DC level plus the
R SHDN
C FILTER
noise peak will
determine the
FIGURE B. CURRENT LIMIT WITH
current limiting
SHUTDOWN CURRENT MODE.
value.As in most
switching circuits it may be difficult to determine the true noise
amplitude without careful attention to grounding of the oscilloscope probe. Use the shortest possible ground lead for the
probe and connect exactly at the GND terminal of the ampliier.
Suggested starting values are CFILTER = .01uF, RFILTER = 5k .
The required value of RLIMIT in voltage mode may be calculated by:
RLIMIT = .1 V / ILIMIT
1K
where RLIMIT is the required resistor value, and ILIMIT is the
maximum desired current. In current mode the required value
of each RLIMIT is 2 times this value since the sense voltage is
divided down by 2 (see Figure B). If RSHDN is used it will further
divide down the sense voltage. The shutdown divider network
will also have an effect on the iltering circuit.
BYPASSING
Adequate bypassing of the power supplies is required for
proper operation. Failure to do so can cause erratic and low
efficiency operation as well as excessive ringing at the outputs. The Vs supply should be bypassed with at least a 1µF
ceramic capacitor in parallel with another low ESR capacitor
of at least 10µF per amp of output current. Capacitor types
rated for switching applications are the only types that should
be considered. The bypass capacitors must be physically
connected directly to the power supply pins. Even one inch of
lead length will cause excessive ringing at the outputs. This
is due to the very fast switching times and the inductance of
the lead connection. The bypassing requirements of the Vcc
supply are less stringent, but still necessary. A .1µF to .47µF
ceramic capacitor connected directly to the Vcc pin will suffice.
STARTUP CONDITIONS
The high side of the all N channel output bridge circuit is
driven by bootstrap circuit and charge pump arrangement. In
order for the circuit to produce a 100% duty cycle indeinitely
the low side of each half bridge circuit must have previously
been in the ON condition. This means, in turn, that if the input
signal to the SA03 at startup is demanding a 100% duty cycle,
the output may not follow the command and may be in a tristate condition. The ramp signal must cross the input signal
at some point to correctly determine the output state. After the
ramp crosses the input signal level one time, the output state
will be correct thereafter.
SA03U
SA03
POWER SUPPLY SEQUENCING
The VCC power supply voltage must be applied prior to the +VS power supply voltage. The output stage devices will be damaged
if the VCC supply is not present when the +VS supply is applied. Always sequence the VCC supply prior to the +VS supply.
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.
www.apexanalog.com
SA03U
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OCT 2012
5
SA03U REVK
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