Rainbow-electronics MAX1672 Manual de usuario descargar pdf (Pagina 6)

MAX1672

Step-Up/Down DC-DC Converter

in QSOP Package

6 _______________________________________________________________________________________

N

LX

ILIM

PGND

PS

OUT

100mV

MAX1672

∆T

ON

FIXED T

OFF

GENERATOR

DRV

REF

ERROR

AMP 2

ERROR

AMP 1

INPUT

MONITOR

CURRENT-LIMIT

COMPARATOR

OFF

FB

REFERENCE

GENERATOR

P

FB

FB1

FB2

REF + OFFSET

REF

PS

N

REF

PGI

PGO

3/5

FB

REF

ONB

ONA

IN

OUT

70mV

N

GND

Figure 1. Functional Diagram

1 2 3 4 5 6 7 8 9 10 11 12

Step-Up/Down DC-DC Converter 1

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