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TPS43000PW Datasheet(PDF) 8 Page - Texas Instruments |
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TPS43000PW Datasheet(HTML) 8 Page - Texas Instruments |
8 / 31 page TPS43000 SLUS489 − OCTOBER 2001 8 www.ti.com functional block diagram UDG−01043 VOUT VOUT 3 1 4 5 6 8 SYNC/SD CCS RT CCM BUCK PFM FB TPS43000 9 10 11 12 13 14 15 VIN VOUT NDRV GND PDRV VP SWP R VREF 1.246 V 800 mV 784 mV + 200 mV DELAY TO ZERO REFGOOD REFBAD + 300 mV VINEST 2.75 V + VBEST VDD LEB 10 mV + IZERO RECTOFF (STOP SWITCH RECTIFICATION) 3−BIT UP COUNTER + SQ Q R 150 mV 250 mV + SWN LEB 6−BIT UP/DOWN COUNTER RESET SHUTDOWN FOR 900 CYCLES THEN SOFT−START RESET HICCUP (STOP SWITCHING FOR 900 CYCLES THEN SOFT−START) IMAX (STOP ENERGIZING INDICATOR) 16 2 7 COMP ERROR AMPLIFIER + SOFT START PWM COMPARATOR HICCUP 800 mV SHUTDOWN TIMER AND OSCILLATOR SHUTDOWN (SD) 95% MAXIMUM DUTY CYCLE NON−BUCK SQ Q R ANTI CROSS CONDUCTION & TOPOLOGY STEERING LOGIC NDRV_RAIL LPM VINEST VINEST + + SQ Q R 3.6 V 3.3 V LPM RECTOFF IMAX 1.6 R RESET 784 mV + + REFGOOD RECTIFY VIN VIN UVLO SLEEP SLEEP SD REFBAD SLEEP HICCUP PWM ENABLE |
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