Datasheet LTC7878 (Analog Devices) - 10
| Fabricante | Analog Devices |
| Descripción | 70V Parallelable 4-Switch Buck-Boost Controller with Inductor DCR Current Sensing |
| Páginas / Página | 30 / 10 — BLOCK DIAGRAM |
| Formato / tamaño de archivo | PDF / 2.4 Mb |
| Idioma del documento | Inglés |
BLOCK DIAGRAM
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LTC7878
BLOCK DIAGRAM
L1 CS RS ISNSP ISNSD ISNSN VOUT + – – VOUT CHARGE BOOST2 COUT BOOST1 VIN BOOST2 SW1 CHARGE BOOST1 CBST1 CBST2 0.1µF 0.1µF SLOPE C TG1 IN COMPENSATION TG2 AND RECOVERY R – SW1 + R SW2 DRVCC DRV CONTROL LOGIC CC ANTI-SHOOT-THROUGH BG1 BG2 PGND PGND 200mV CSP – × 20 V CSN IN V + IN 1.2V LDO + BOOST2 BOOST1 EXTVCC EXTVCC LDO 15μA SETCUR DBST2 DBST1 INTVCC DRVCC (7V) – CDRV ITHB CC 4.7µF INTVCC UVLO ILLIMIT gmb LDO SELECT + INTVCC (5V) CCM/ CINTV R CC THB DCM 4.7µF – 10uA MODE/ ILLIMIT ITH ILIM (gm–gmb) FREQ OSC + RTH SYNC 1.0VREF SOFT-START CTH VIN OR EXTVCC PHASE INTVcc VFB 1μA ~ 6μA SELECT 2.5μA PGOOD 1.2V 1.1V + RUN COMP – 0.9V MODE/ SGND ILIM CLKOUT PHASMD SS 7878BD Rev. C 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
BLOCK DIAGRAM
L1 CS RS ISNSP ISNSD ISNSN VOUT + – – VOUT CHARGE BOOST2 COUT BOOST1 VIN BOOST2 SW1 CHARGE BOOST1 CBST1 CBST2 0.1µF 0.1µF SLOPE C TG1 IN COMPENSATION TG2 AND RECOVERY R – SW1 + R SW2 DRVCC DRV CONTROL LOGIC CC ANTI-SHOOT-THROUGH BG1 BG2 PGND PGND 200mV CSP – × 20 V CSN IN V + IN 1.2V LDO + BOOST2 BOOST1 EXTVCC EXTVCC LDO 15μA SETCUR DBST2 DBST1 INTVCC DRVCC (7V) – CDRV ITHB CC 4.7µF INTVCC UVLO ILLIMIT gmb LDO SELECT + INTVCC (5V) CCM/ CINTV R CC THB DCM 4.7µF – 10uA MODE/ ILLIMIT ITH ILIM (gm–gmb) FREQ OSC + RTH SYNC 1.0VREF SOFT-START CTH VIN OR EXTVCC PHASE INTVcc VFB 1μA ~ 6μA SELECT 2.5μA PGOOD 1.2V 1.1V + RUN COMP – 0.9V MODE/ SGND ILIM CLKOUT PHASMD SS 7878BD Rev. C 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts