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LTM4630A Datasheet(PDF) 10 Page - Linear Technology |
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LTM4630A Datasheet(HTML) 10 Page - Linear Technology |
10 / 34 page LTM4646 10 4646f For more information www.linear.com/LTM4646 BLOCK DIAGRAM Figure 1. Simplified LTM4646 Block Diagram +– + +– + + RUN1 AND RUN2 SEPARATE: DRVCC EXTVCC MODE_PLLIN CLKOUT PHASMD RUN2 SGND 100k POWER CONTROL LOGIC BLOCK SS VIN DRVCC MTOP2 C8 1µF 0.47µH GATE DRIVE INTERNAL COMP COMP2A TRACK/SS1 FREQ VRNG INTVCC INTVCC COMP2B COMP1A COMP1B 115k 350kHz SGND RUN1 VIN 4.7µF 130k TRACK/SS2 PGOOD2 SGND CSS VFB1 0.555V PGOOD2 BLOCK SS SGND 1µA 0.645V 0.6V REF 50k R7 50k LOCATED NEAR POWER STAGES 470pF VOUT2 60.4k 49.9Ω MBOT2 1µF 1µA VFB2 VOUTS2– TEMP2+ TEMP2– VOUTS2 COUT2 RFB3 30.1k GND TEMP SENSOR SGND VOUT2 VOUT2 1.2V/10A SW2 VIN PGOOD1 gm – + – + – + + VFB2 RFB2 60.4k CIN3 10µF 25V CIN4 10µF 25V SGND CSS SGND 100k INTVCC 1µF 1µF gm – + + SGND 0.6V REF VFB1 VFB1 0.555V PGOOD1 BLOCK 0.645V – + – + LOCATED NEAR POWER STAGES PNP 470pF TEMP1+ TEMP1– TEMP SENSOR VOUT1 60.4k 49.9Ω ×1 VFB1 VOUTS1 RFB1 40.2k VIN MTOP1 1µF 0.47µH GATE DRIVE MBOT1 1µF COUT1 GND VOUT1 1.5V/10A SW1 VIN CIN1 10µF 25V CIN2 10µF 25V 100µF 25V TOP G BOT G DRVCC LDO DRVCC CPWR CPWR VOUTS1– VIN 4.5V TO 20V GND RUN1 AND RUN2 TIED TOGETHER: GND INTERNAL COMP x2 0.6V 0.3V SEE FIGURE 18 2Ω PNP tSOFT-START = CSS 1µA • 0.6V ) ( RFREQ = 41550 f(kHz) – 2.2 ) ( RPULLUP = VIN(MIN) • 100k 1.3 – 100k ) ( RPULLUP = VIN(MIN) • 50k 1.3 – 50k ) ( 4646 F01 |
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