(800) 546-APEX (800) 546-2739 FEATURES HALF BRIDGE OUTP

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(800) 546-APEX (800) 546-2739 FEATURES HALF BRIDGE OUTP

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SA14
(800) 546-APEX
(800) 546-2739
FEATURES
HALF BRIDGE OUTPUT WIDE SUPPLY RANGE-16-200V CONTINUOUS CASE PROTECTION CIRCUITS ANALOG DIGITAL INPUTS SYNCHRONIZED EXTERNAL OSCILLATOR FLEXIBLE FREQUENCY CONTROL
SA14
TE9493
APPLICATIONS
MOTORS REACTIVE LOADS FREQUENCY SONAR LARGE PIEZO ELEMENTS OFF-LINE DRIVERS WELD CONTROLLER
EXTERNAL CONNECTIONS
DESCRIPTION
SA14 half bridge pulse width modulation amplifier that supply 4000W load. Flexible frequency control provided. internal 45kHz oscillator requires external components used synchronize multiple amplifiers. oscillator output divided down connected clock input lower switching frequency clock input stage divides determines output switching rate (normally 22.5 kHz). shutdown input turns both output drivers. High side current sensing protects amplifier from shorts ground. addition, half bridge output MOSFETs protected from thermal overloads directly sensing temperature die. 12-pin hermetic MO-127 power package occupies only square inches board space.
+PWM -PWM/RAMP SHDN
VIEW
Case tied Allow current case. Bypassing supplies required. Package Apex MO-127 (STD). Outline Dimensions/Packages Apex data book. +PWM RAMP/-PWM then HIGH. *See text.
BLOCK DIAGRAM TYPICAL APPLICATION PROGRAMMABLE POWER SUPPLY
+PWM -PWM/RAMP 470pF
CURRENT LIMIT
OUTPUT DRIVERS LOAD
CONTROL SIGNAL 3/7V
SHUTDOWN CONTROL
SHDN
.01µF
RSENSE
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
SA14
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
200V 150W 300°C 150°C +150°C +125°C +11V +11V +10V UNITS
SPECIFICATIONS
PARAMETER CLOCK (CLK) OUT, high level4 OUT, level4 FREQUENCY RAMP, center voltage RAMP, voltage level4 high level4 OUTPUT 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:
IOUT IOUT
Each output driver 200V 85°C case
22.05 22.5 22.95
Full temperature range Full temperature range IOUT Load
Full temperature range, each Full temperature range Meets full range specifications
°C/W °C/W
Each 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) SA14 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
SA14
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
FLYBACK CURRENT,
TOTAL VOLTAGE DROP,
125°C 100°C
85°C
SOURCE DRAIN DIODE VOLTAGE
60°C 25°C -55°C -25°C 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
120V, LOAD
SWITCHING FREQUENCY, (kHz)
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
OPERATING CONSIDERATIONS
SA14
external shutdown command mixed with protection circuit Figure figure shutdown command signal divided down threshold level SHDN SA14. long shutdown command remains high both output transistors will remain off.
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.
SHDN
RSENSE
SHUTDOWN SIGNAL
FIGURE ADDING SHUTDOWN CONTROL.
INPUTS
half bridge driver accessed input comparator. When +PWM -PWM then HIGH. motion control processor which generates signal drive these pins with signals referenced GND.
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.
PROTECTION CIRCUITS
high side current monitor will latch output transistors when high side current rises approximately 150% rated output. temperature output transistors also monitored. When either output transistors reaches approximately 165°C both latched off. either case, will necessary remove fault condition recycle power restart circuit. short protected against inserting sensing resistor into circuit shown Figure
STARTUP CONDITIONS
high side channel output half bridge circuit driven bootstrap circuit charge pump arrangement. order circuit produce 100% duty cycle indefinitely side transistor must have previously been condition. This means, turn, that input signal SA14 startup demanding 100% duty cycle, output follow command tri-state 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.
SHDN
SENSE
FIGURE PROTECTING AGAINST SHORTS +Vs.
Figure sense resistor inserted into connection tied SHDN pin. When current from short develops across sense resistor shutdown circuit will shut output transistors remainder switching cycle. SA14 will restart beginning cycle retest this condition. This circuit does test shorts ground. circuit filters switching spikes need adjusted ignore normal current spikes application circuit.
This data sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies omissions. specifications subject change without notice. SA14U REV. MARCH 1999 1999 Apex Microtechnology Corp.

(800) 546-APEX (800) 546-2739 FEATURES HALF BRIDGE OUTP

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