(800) 546-APEX (800) 546-2739 FEATURE HIGH FREQUENCY SW

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

(800) 546-APEX (800) 546-2739 FEATURE HIGH FREQUENCY SW

Datasheet Thumbnail

Top Searches for this datasheet

SA12
(800) 546-APEX
(800) 546-2739
FEATURE
HIGH FREQUENCY SWITCHING WIDE SUPPLY RANGE-16-200V CONTINUOUS CASE PROTECTION CIRCUITS ANALOG DIGITAL INPUTS SYNCHRONIZED EXTERNAL OSCILLATOR FLEXIBLE FREQUENCY CONTROL
SA12
TE9493
APPLICATIONS
REACTIVE LOADS FREQUENCY SONAR LARGE PIEZO ELEMENTS OFF-LINE DRIVERS WELD CONTROLLER
EXTERNAL CONNECTIONS
DESCRIPTION
SA12 pulse width modulation amplifier that supply 3000W load. internal 400kHz oscillator requires external components. clock input stage divides oscillator frequency two, which provides switching frequency. External oscillators also used lower switching frequency synchronize multiple amplifiers. Current sensing provided each half H-bridge giving amplitude direction data. shutdown input turns four drivers H-bridge output. high side current limit programmable side current limit protect amplifier from shorts supply ground addition load shorts. H-bridge output MOSFETs protected from thermal overloads directly sensing temperature die. 12-pin hermetic MO-127 power package occupies only square inches board space.
ISENSE +PWM -PWM/RAMP ILIM/SHDN
VIEW
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. *See text.
BLOCK DIAGRAM TYPICAL APPLICATION TORQUE MOTOR DRIVER
+PWM -PWM/RAMP 470pF OUTPUT DRIVERS MOTOR SHUTDOWN CONTROL CONTROL SIGNAL 3/7V SENSE ILIM/SHDN SENSE RSENSE CURRENT LIMIT
.01µF
RSENSE
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
SA12
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, SUPPLY VOLTAGE, POWER DISSIPATION, internal TEMPERATURE, solder TEMPERATURE, junction3 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 RON4 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:
200V 250W1 300°C 150°C +150°C +125°C +11V +11V +10V UNITS
IOUT IOUT
200V 65°C case
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 125W. 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.
CAUTION
SA12 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.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
SA12
CLOCK LOADING
NORMALIZED FREQUENCY, NORMALIZED FREQUENCY,
INTERNAL POWER DISSIPATION,
POWER DERATING
EACH ACTIVE OUTPUT RESISTOR
CLOCK FREQUENCY OVER TEMP
102.0 101.5 101.0 100.5 99.5 99.0 98.5 98.0 CASE TEMPERATURE, (°C)
NOMINAL 400kHz 100K CLOCK LOAD RESISTANCE,
CASE TEMPERATURE, (°C)
FLYBACK CURRENT,
REVERSE DIODE
NORMALIZED TOTAL ON,(X)
NORMALIZED RESISTANCE
TOTAL VOLTAGE DROP
100° 125° -55°
SOURCE DRAIN DIODE VOLTAGE
JUNCTION TEMPERATURE,
TOTAL VOLTAGE DROP,
OUTPUT CURRENT,
CONTINUOUS OUTPUT
DUTY CYCLE ANALOG INPUT
NORMALIZED QUIESCENT CURRENT,
QUIESCENT CURRENT
CONTINUOUS AMPS
DUTY CYCLE,
CASE TEMPERATURE, (°C)
ANALOG INPUT,
SWITCHING FREQUENCY, (kHz)
NORMALIZED QUIESCENT CURRENT,
NORMALIZED QUIESCENT CURRENT,
CASE TEMPERATURE, (°C) SHUTDOWN OPERATION NORMAL OPERATION 22.5
NORMALIZED QUIESCENT CURRENT,
QUIESCENT CURRENT
QUIESCENT VOLTAGE
QUIESCENT FREQUENCY
SWITCHING FREQUENCY, (kHz)
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
SA12
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."
SENSE
OPERATING CONSIDERATIONS
CLOCK CIRCUIT RAMP GENERATOR
clock frequency internally frequency approximately 400kHz. 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 400kHz 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.
peak will determine current limiting value. most switching circuits difficult determine LIMIT true noise amplitude without SENSE careful attention grounding oscilloscope probe. shortest possible LIMIT ground lead SHUTDOWN probe LIMIT/SHDN SIGNAL connect exactly FILTER terminal 0/10V FILTER IN4148 amplifier. Suggested starting values FIGURE CURRENT LIMIT WITH CFILTER .01uF, SHUTDOWN CURRENT MODE. RFILTER 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.
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
fixed internal current limit senses high side current. Should either outputs shorted ground high side current limit will latch output transistors. temperature output transistors also monitored. Should fault condition raise temperature output transistors 165°C thermal protection circuit will latch output transistors. latched condition cleared either recycling power toggling LIMIT/SHDN input with pulse. Figures outputs will remain long shutdown pulse high (10V).
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 RLIMIT resistors (through filter network shutdown divider resistor) connect RLIMIT resistors directly pin. Switching noise spikes will invariably found SENSE pins. noise SENSE spikes could trip current limit threshold LIMIT which only SENSE RFILTER CFILTER should adjusted SHUTDOWN LIMIT/SHDN reduce SIGNAL FILTER switching noise well 0/10V FILTER below IN4148 prevent false current limiting. level plus noise FIGURE CURRENT LIMIT WITH SHUTDOWN VOLTAGE MODE.
MODULATION RANGE
high side channel H-bridge driven bootstrap circuit. output circuit switch high, side circuit must have previously been switched order charge bootstrap capacitor. Therefore, input signal SA12 demands 100% duty cycle upon start-up output will follow will tri-state (open) condition. ramp signal must cross input signal some point correctly determine output state. After ramp crosses input signal time output state will correct thereafter. addition, during normal operation input signal drives SA12 beyond linear modulation range (approximately 95%) output will jump 100% modulation.
This data sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies omissions. specifications subject change without notice. SA12U REV. DECEMBER 1999 1999 Apex Microtechnology Corp.

(800) 546-APEX (800) 546-2739 FEATURE HIGH FREQUENCY SW

Top Searches for this datasheet

Other recent searches