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TL494   Unisonic Technologies Co., Ltd QW-R103-004. J VOLTAGE MODE PWM CONTROL CIRCUIT  DESCRIPTION The UTC TL494 incorporates all the functions required in the construction of a pulse-width modulation switching circuit. Designed primarily for switching power supply control or DC-DC convectors, it offers the systems engineer the flexibility to tailor control circuitry to its own application.  FEATURES * Complete PWM power control circuitry * Uncommitted outputs for 200mA sink or source current * Output control selects single ended or push pull operation * Internal circuitry prohibits double pulses over total range * Easy synchronization  ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing TL494L-D16-T TL494G-D16-T DIP-16 Tube - TL494G-S16-R SOP-16 Tape Reel - TL494G-P16-R TSSOP-16 Tape Reel 

TL494 

 ABSOLUTE MAXIMUM RATINGS (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage(Note 3) VCC 41 V Amplifier Input Voltage VIN VCC+0.3 V Collector Output Voltage VOUT 41 V Collector Output Current ICO 250 mA Power Dissipation (TA=25C) 1000 mW Derate at TA＞25C PD 9.2 mW/C Junction Temperature TJ 125 C Operating Temperature TOPR -25 ~ +85 C Storage Temperature TSTG -40 ~ +150 C

  RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP MAX UNIT Supply Voltage VCC 7 40 V Amplifier Input Voltage VIN -0.3 VCC-2 V Collector Output Voltage VOUT 40 V Collector Output Current (each Transistor) IC 200 mA Current into Feedback If 0.3 mA Timing Capacitor CT 0.47 10000 nF Timing Resistor RT 1.8 500 kΩ Oscillator Frequency fOSC 1 300 kHz Operating Free-Air Temperature TA 0 70 C 

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