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L6712Q датащи(PDF) 1 Page - STMicroelectronics |
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L6712Q датащи(HTML) 1 Page - STMicroelectronics |
1 / 27 page 1/27 L6712 L6712A March 2004 ■ 2 PHASE OPERATION WITH SYNCHRONOUS RECTIFIER CONTROL ■ ULTRA FAST LOAD TRANSIENT RESPONSE ■ INTEGRATED HIGH CURRENT GATE DRIVERS: UP TO 2A GATE CURRENT ■ 3 BIT PROGRAMMABLE OUTPUT FROM 0.900V TO 3.300V OR WITH EXTERNAL REF. ■ ±0.9% OUTPUT VOLTAGE ACCURACY ■ 3mA CAPABLE AVAILABLE REFERENCE ■ INTEGRATED PROGRAMMABLE REMOTE SENSE AMPLIFIER ■ PROGRAMMABLE DROOP EFFECT ■ 10% ACTIVE CURRENT SHARING ACCURACY ■ DIGITAL 2048 STEP SOFT-START ■ CROWBAR LATCHED OVERVOLTAGE PROT. ■ NON-LATCHED UNDERVOLTAGE PROT. ■ OVERCURRENT PROTECTION REALIZED USING THE LOWER MOSFET'S RdsON OR A SENSE RESISTOR ■ OSCILLATOR EXTERNALLY ADJUSTABLE AND INTERNALLY FIXED AT 150kHZ ■ POWER GOOD OUTPUT AND INHIBIT FUNCTION ■ PACKAGES: SO-28 & VFQFPN-36 APPLICATIONS ■ HIGH CURRENT DC/DC CONVERTERS ■ DISTRIBUTED POWER SUPPLY DESCRIPTION The device implements a dual-phase step-down con- troller with a 180 phase-shift between each phase optimized for high current DC/DC applications. Output voltage can be programmed through the in- tegrated DAC from 0.900V to 3.300V; program- ming the "111" code, an external reference from 0.800V to 3.300V is used for the regulation. Programmable Remote Sense Amplifier avoids use of external resistor divider and recovers loss- es along distribution line. The device assures a fast protection against load over current and Over / Under voltage.An internal crowbar is provided turning on the low side mosfet if Over-voltage is detected. Output current is limited working in Constant Cur- rent mode: when Under Voltage is detected, the device resets, restarting operation. SO28 VFQFPN-36 (6x6x1.0) ORDERING NUMBERS: Package Tube Tape & Reel SO L6712D, L6712AD L6712DTR, L6712ADTR VFQFPN L6712Q, L6712AQ L6712QTR, L6712AQTR TWO-PHASE INTERLEAVED DC/DC CONTROLLER BLOCK DIAGRAM CURRENT READING TOTAL CURRENT CH1 OCP DAC CH1 OCP PWM1 ERROR AMPLIFIER REMOTE AMPLIFIER LS LS HS Vcc HS BOOT1 UGATE1 PHASE1 LGATE1 ISEN1 PGNDS1 PGND PGNDS2 ISEN2 LGATE2 PHASE2 UGATE2 BOOT2 Vcc COMP FB VSEN FBG FBR VID0 VID1 VID2 OSC / INH SGND VCCDR VCCDR VCC LOGIC AND PROTECTIONS PWM2 CH2 OCP CURRENT READING REF_IN/OUT PGOOD DROOP BAND-GAP REFERENCE DIGITAL SOFT-START CH2 OCP V PROG CURRENT READING TOTAL CURRENT CH1 OCP DAC CH1 OCP PWM1 ERROR AMPLIFIER REMOTE AMPLIFIER LS LS HS Vcc HS BOOT1 UGATE1 PHASE1 LGATE1 ISEN1 PGNDS1 PGND PGNDS2 ISEN2 LGATE2 PHASE2 UGATE2 BOOT2 Vcc COMP FB VSEN FBG FBR VID0 VID1 VID2 OSC / INH SGND VCCDR VCCDR VCC LOGIC AND PROTECTIONS PWM2 CH2 OCP CURRENT READING REF_IN/OUT PGOOD DROOP BAND-GAP REFERENCE DIGITAL SOFT-START CH2 OCP V PROG |
Аналогичный номер детали - L6712Q |
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Аналогичное описание - L6712Q |
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