(800) 546-APEX (800) 546-2739 FEATURES WIDE SUPPLY RANG

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(800) 546-APEX (800) 546-2739 FEATURES WIDE SUPPLY RANG

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(800) 546-APEX
(800) 546-2739
FEATURES
WIDE SUPPLY RANGE-16-100V CONTINUOUS CASE PROTECTION CIRCUITS ANALOG DIGITAL INPUTS SYNCHRONIZED EXTERNAL OSCILLATOR FLEXIBLE FREQUENCY CONTROL
TE9493
APPLICATIONS
MOTORS REACTIVE LOADS FREQUENCY SONAR LARGE PIEZO ELEMENTS OFF-LINE DRIVERS WELD CONTROLLER
EXTERNAL CONNECTIONS
DESCRIPTION
SA03 pulse width amplifier that supply 3000W load. internal 45kHz oscillator requires external components. clock input stage divides oscillator frequency two, which provides basic switching 22.5 kHz. External oscillators also used lower switching frequency synchronize multiple amplifiers. Current sensing provided each half bridge giving amplitude direction data. shutdown input turns four drivers bridge output. high side current limit programmable side current limit protect amplifier from shorts supply ground addition load shorts. bridge output MOSFETs protected from thermal overloads directly sensing temperature die. 12pin hermetic MO-127 power package occupies only square inches board space.
+PWM -PWM/RAMP ILIM/SHDN
VIEW
ISENSE SENSE
Case tied Allow current case. Bypassing supplies required. Package Apex MO-127 (STD). Outline Dimensions/Packages Apex data book. +PWM RAMP/-PWM then OUT. text.
BLOCK DIAGRAM TYPICAL APPLICATION
+PWM
CURRENT LIMIT
-PWM/RAMP 470pF SHUTDOWN CONTROL CONTROL SIGNAL 3/7V OUTPUT DRIVERS MOTOR SENSE ILIM/SHDN SENSE RSENSE .01µF
RSENSE
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, SUPPLY VOLTAGE, POWER DISSIPATION, internal TEMPERATURE, solder TEMPERATURE, junction2 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case INPUT VOLTAGE, +PWM INPUT VOLTAGE, -PWM INPUT VOLTAGE, ILIM TEST CONDITIONS2
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SPECIFICATIONS
PARAMETER CLOCK (CLK) OUT, high level4 OUT, level4 FREQUENCY RAMP, center voltage RAMP, voltage level4 high level4 OUTPUT TOTAL EFFICIENCY, output SWITCHING FREQUENCY CURRENT, continuous4 CURRENT, peak4 POWER SUPPLY VOLTAGE, VOLTAGE, CURRENT, CURRENT, VCC, shutdown CURRENT, ILIM/SHUTDOWN TRIP POINT INPUT CURRENT THERMAL3 RESISTANCE, junction case RESISTANCE, junction TEMPERATURE RANGE, case NOTES:
100V 300W 300°C 150°C +150°C +125°C +11V +11V +10V UNITS
IOUT IOUT
100V 60°C case 22.5
Full temperature range Full temperature range IOUT Load
Full temperature range, each Full temperature range Meets full range specifications
°C/W °C/W
Each active output transistors dissipate 150W. Unless otherwise noted: 25°C, typical specification. Long term operation maximum junction temperature will result reduced product life. Derate internal power dissipation achieve high MTTF. guidance, refer heatsink data sheet. Guaranteed tested. 100% duty cycle required VS(MIN) SA03 constructed from MOSFET transistors. handling procedures must observed. internal substrate contains beryllia (BeO). break seal. accidentally broken, crush, machine, subject temperatures excess 850°C avoid generating toxic fumes.
CAUTION
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
CLOCK LOADING
NORMALIZED FREQUENCY, NORMALIZED FREQUENCY,
INTERNAL POWER DISSIPATION,
POWER DERATING
CASE TEMPERATURE, (°C)
EACH ACTIVE OUTPUT TRANSISTOR
CLOCK FREQUENCY OVER TEMP
102.0 101.5 101.0 100.5 99.5 99.0 98.5 98.0 CASE TEMPERATURE, (°C)
NOMINAL 45kHz 100K CLOCK LOAD RESISTANCE,
REVERSE DIODE
TOTAL VOLTAGE DROP
CASE TEMPERATURE 60°C 85°C 100°C 125°C
FLYBACK CURRENT,
TOTAL VOLTAGE DROP,
-25°C -55°C
25°C
SOURCE DRAIN DIODE VOLTAGE
OUTPUT CURRENT,
CONTINUOUS OUTPUT
DUTY CYCLE ANALOG INPUT
NORMALIZED QUIESCENT CURRENT,
QUIESCENT CURRENT
CONTINUOUS AMPS
CASE TEMPERATURE, (°C)
DUTY CYCLE,
ANALOG INPUT,
SWITCHING FREQUENCY, (kHz)
NORMALIZED QUIESCENT CURRENT,
NORMALIZED QUIESCENT CURRENT,
CASE TEMPERATURE, (°C) SHUTDOWN OPERATION NORMAL OPERATION 22.5
-55°C 125°C
NORMALIZED QUIESCENT CURRENT,
QUIESCENT CURRENT
QUIESCENT VOLTAGE
QUIESCENT FREQUENCY
60V, LOAD SWITCHING FREQUENCY, (kHz)
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
OPERATING CONSIDERATIONS
noise spikes could trip current limit threshold which only RFILTER FILTER should adjusted LIMIT reduce switching noise well SENSE below prevent false current limiting. LIMIT level plus noise peak will determine SHUTDOWN current limiting LIMIT/SHDN SIGNAL FILTER value. most switching circuits SHDN FILTER difficult determine true noise ampliFIGURE CURRENT LIMIT WITH tude without SHUTDOWN CURRENT MODE. careful attention grounding oscilloscope probe. shortest possible ground lead probe connect exactly terminal amplifier. Suggested starting values CFILTER .01uF, RFILTER
SENSE
GENERAL
Helpful information about power supplies, heatsinking mounting found "General Operating Considerations" section Apex data book. information package outline, heatsinks, mounting hardware "Package Outlines" "Accessories" section data book. Also Application Note "PWM Basics."
CLOCK CIRCUIT RAMP GENERATOR
clock frequency internally frequency approximately 45kHz. will normally tied pin. clock divided applied network which produces ramp signal -PWM/ RAMP pin. external clock signal applied synchronization purposes. clock frequency lower than 45kHz chosen external capacitor must tied -PWM/RAMP pin. This capacitor, which parallels internal capacitor, must selected that ramp oscillates volts with lower peak volts above ground.
INPUTS
full bridge driver accessed input comparator. When +PWM -PWM then OUT. motion control processor which generates signal drive these pins with signals referenced GND.
PROTECTION CIRCUITS
addition externally programmable current limit there also fixed internal current limit which senses only high side current. nominally 140% continuous rated output current. Should either outputs shorted ground high side current limit will latch output transistors. Also, temperature output transistors continually monitored. Should fault condition occur which raises temperature output transistors 165°C thermal protection circuit will activate also latch output transistors. either case, will necessary remove fault condition recycle power restart circuit.
required value RLIMIT voltage mode calculated RLIMIT ILIMIT where RLIMIT required resistor value, ILIMIT maximum desired current. current mode required value each RLIMIT times this value since sense voltage divided down (see Figure RSHDN used will further divide down sense voltage. shutdown divider network will also have effect filtering circuit.
BYPASSING
Adequate bypassing power supplies required proper operation. Failure cause erratic efficiency operation well excessive ringing outputs. supply should bypassed with least ceramic capacitor parallel with another capacitor least 10µF output current. Capacitor types rated switching applications only types that should considered. bypass capacitors must physically connected directly power supply pins. Even inch lead length will cause excessive ringing outputs. This very fast switching times inductance lead connection. bypassing requirements supply less stringent, still necessary. .1µF .47µF ceramic capacitor connected directly will suffice.
CURRENT LIMIT
There load current sensing pins, SENSE SENSE pins shorted voltage mode connection both must used current mode connection (see figures recommended that RLIMIT resistors non-inductive. Load current flows SENSE pins. avoid errors lead lengths connect LIMIT/ SHDN directly LIMIT resistors SENSE (through filter network shutdown LIMIT SENSE vider resistor) connect RLIMIT resis1K SHUTDOWN tors directly LIMIT/SHDN FILTER SIGNAL pin. Switching noise SHDN FILTER spikes will invariably found SENSE pins. FIGURE CURRENT LIMIT WITH
SHUTDOWN VOLTAGE MODE.
STARTUP CONDITIONS
high side channel output bridge circuit driven bootstrap circuit charge pump arrangement. order circuit produce 100% duty cycle indefinitely side each half bridge circuit must have previously been condition. This means, turn, that input signal SA03 startup demanding 100% duty cycle, output follow command tristate condition. ramp signal must cross input signal some point correctly determine output state. After ramp crosses input signal level time, output state will correct thereafter.
This data sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies omissions. specifications subject change without notice. SA03U REV. MARCH 1999 1999 Apex Microtechnology Corp.

(800) 546-APEX (800) 546-2739 FEATURES WIDE SUPPLY RANG

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