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TIL5942ANFC Datasheet(PDF) 2 Page - Texas Instruments |
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TIL5942ANFC Datasheet(HTML) 2 Page - Texas Instruments |
2 / 20 page TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 functional block diagram Voltage Reference Voltage Regulator Oscillator DQ CLK R Driver LED Primary Secondary TL1431X 11 13 12 14 4 3 1 2 1V 10 9 16 15 REG OUT IS VC VCC PWM_GND REF RT/CT BIAS COMP FB INPUT_GND I(VC) IIB(IS) Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION FB 1 I Feedback. FB is an error-amplifier inverting input. INPUT_GND 2 I Ground connection for the voltage reference/error amplifier section. COMP 3 O Error amplifier output/LED cathode connection. RC networks may be connected between COMP, FB, and GND to stabilize the control loop of the dc/dc converter. BIAS 4 I Optocoupler LED anode. BIAS connects to the output voltage of the dc/dc converter or to some other suitable supply voltage through a resistor. NC 7,8 No connection. OUT 9 O Drive output. OUT is a pulse-width-modulated output. REG 10 O Regulator output. A 0.1- µF, typical, ceramic capacitor should be connected between REG and PWM_GND. VCC 11 I Supply voltage for PWM controller REF 12 O PWM 5-V reference output PWM_GND 13 I PWM ground connection RT/CT 14 Connection for external RC network to set PWM oscillator frequency VC 15 Connection for integrating capacitor (0.1 µF typ) to PWM_GND (terminal 13) IS 16 I PWM current sense input |
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