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

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

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SA18
(800) 546-APEX
(800) 546-2739
FEATURES
HALF BRIDGE IGBT OUTPUT WIDE SUPPLY RANGE-16-500V 100° CASE PROTECTION CIRCUITS SYNCHRONIZED EXTERNAL OSCILLATOR FLEXIBLE FREQUENCY CONTROL
SA18
TE9493
APPLICATIONS
MOTORS REACTIVE LOADS FREQUENCY SONAR LARGE PIEZO ELEMENTS OFF-LINE DRIVERS WELD CONTROLLER
EXTERNAL CONNECTIONS
DESCRIPTION
SA18 pulse width modulation amplifier that supply 10KW load. internal oscillator requires external components. clock input stage divides oscillator frequency two, which provides switching frequency 22.5 kHz. External oscillators also used lower switching frequency synchronize multiple amplifiers. shutdown input turns both drivers half bridge output. high side current limit protects amplifier from shorts ground addition load shorts. output IGBTs protected from thermal overloads directly sensing temperature die. 12-pin hermetic MO-127 power package occupies only square inches board space.
+PWM FLAG SHDN
VIEW
BLOCK DIAGRAM TYPICAL APPLICATION VOLTAGE CONTROLLED VOLTAGE SOURCE
Case tied Allow current case. Bypassing supplies required. Package Apex MO-127 (STD). Outline Dimensions/Packages Apex data book. +PWM goes more positive, duty cycle increases. *See text.
+PWM
CURRENT LIMIT
FLAG 470pF OUTPUT DRIVERS CONTROL SIGNAL 3/7V SHUTDOWN CONTROL SHDN RSENSE .01µF LOAD
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
SA18
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, SUPPLY VOLTAGE, POWER DISSIPATION, internal1 TEMPERATURE, solder TEMPERATURE, junction2 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case INPUT VOLTAGE, +PWM INPUT VOLTAGE, SHDN TEST CONDITIONS2
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SPECIFICATIONS
PARAMETER CLOCK (CLK) OUT, high level4 OUT, level4 level4 high level4 FREQUENCY ANALOG INPUT (+PWM) center voltage voltage FLAG FLAG, high level FLAG, level OUTPUT TOTAL DROP 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
500V 125W 300°C 150°C +150°C +125°C +11V +11V UNITS
IOUT IOUT
44.10
45.00
45.9
0/100% modulation
380V 100°C case
22.05 22.50 22.95
IOUT Load
°C/W °C/W
NOTES:
Each output transistors dissipate 125W, only time. 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
SA18 constructed from static sensitive components. 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 (520) 888-3329 ORDERS (520) 690-8601 EMAIL HOTLINE: (800) 546-2739 MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 TUCSON, ARIZONA 85741 APPLICATIONS prodlit@apexmicrotech.com
TYPICAL PERFORMANCE GRAPHS
SA18
CLOCK LOADING
NORMALIZED FREQUENCY, NORMALIZED FREQUENCY,
INTERNAL POWER DISSIPATION,
POWER DERATING
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,
CASE TEMPERATURE, (°C)
REVERSE DIODE
TOTAL VOLTAGE DROP
CASE TEMPERATURE
FORWARD CURRENT,
TOTAL VOLTAGE DROP,
100°C DIODE FORWARD VOLTAGE DROP, 25°C
100°C 25°C
OUTPUT CURRENT, I(A)
CONTINUOUS AMPS
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
OPERATING CONSIDERATIONS
SA18
external shutdown command mixed with protection circuit Figure figure shutdown command signal injected directly into shutdown (SHDN). 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. external clock signal applied synchronization purposes, must
SHDN
SHUTDOWN SIGNAL IN4148
FLAG OUTPUT
Whenever SA18 detected fault condition, flag output high (10V). When programmable side current limit exceeded, FLAG output will high. FLAG output will reset next clock cycle. This reflects pulse-by-pulse current limiting feature. When internally-set high side current limit tripped thermal limit reached, FLAG output latched high. PROTECTION CIRCUITS below.
RSENSE
FIGURE ADDING SHUTDOWN CONTROL.
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
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. SA18 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.
high side IGBT 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 SA18 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.
This data sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies omissions. specifications subject change without notice. SA18U REV. JUNE 1999 1999 Apex Microtechnology Corp.

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

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