전자부품 데이터시트 검색엔진 |
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LM2633 데이터시트(PDF) 4 Page - Texas Instruments |
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LM2633 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 47 page SHOOT- THROUGH PROTECTION hdrv1 ldrv1 vdd1 sw1 pgnd1 cboot1 ilim1 ks1 vin vlin5 5V LDO PWM LOGIC SKIP CONTROL & REST CURRENT LIMIT CMP 1 R-2R DAC MIN ON TIME CMP 1 .85 0.9V 5V ss op PWM CMP 1 10PA CYCLE SKIP CMP 1 0.5V CURRENT SENSE AMP 1 COMPEN. RAMP 1 X5 UV DETECTION uvlo 1.1V X2.5 on/ss1 ssto1 2PA 0-CROSS/ NEG. ILIM CMP 1 ERR AMP 2 gm 0.9V gnd thsd: thermal shutdown ss: soft start ssto: ss time out op: normal operation uvlo: under volt. lockout 1.5V thsd fault 1V ch1 on 5PA 1.1V fault R S Q S>R similar signal from Ch.2 pwm or new vid 0 .5V .75V QN ch1 on endfault vout1 slope = VIN x f isns1 vout1 BATTERY 5V 5V comp1 Channel 1 and Channel 3 Voltage Clamp Hi: 0.8V in ss, 2V in op. Lo: 0.45V. LREG 1 in: 0.88V 5V new vid 45mV inn1 1.1V out: 0.82V ERR AMP3 1.24V g3 out3 fb3 EXT. 3.3V vout3 linear regulator controller VID CHANGE DETECTION CIRCUIT Note: 1. Bold blocks and symbols are common to both Channel 1 and Channel 2; 2. Wires and components in light weight are external to the IC. LM2633 SNVS139C – MAY 2004 – REVISED APRIL 2005 www.ti.com Block Diagram Figure 2. Channel 1 and Channel 3 Block Diagram 4 Submit Documentation Feedback Copyright © 2004–2005, Texas Instruments Incorporated Product Folder Links: LM2633 |
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