Rainbow-electronics MAX8742 Manual de usuario descargar pdf (Pagina 14)

MAX8741/MAX8742

500kHz Multi-Output Power-Supply Controllers

with High Impedance in Shutdown

14 ______________________________________________________________________________________

LPF

50kHz

REF

1.75V

2.388V

4.5V

REF

2.5V

REF

333kHz

500kHz

OSC

PWM

LOGIC

LINEAR

REG

BST3

DH3

LX3

DL3

3.3V

ON/OFF

INPUT

7V TO 24V

5V ALWAYS ON

CSL5

SHDN

V+ SYNC

12V

LINEAR

REG

12V

13V

BST5

RAW 15V

DH5

DL5

PGND

CSH5

CSL5

CSH3

CSL3

FB5

RESET

SEQ

2.6V

0.6V 0.6V

GND RUN/ON3

TIME/ON5

REF

LX5

12OUT

SECFB

3.3V

PWM

LOGIC

REF

OUTPUTS

LPF

50kHz

TIMER

POWER-ON

SEQUENCE

LOGIC

FB3

MAX8742

OV/UV

FAULT

2.68V

Figure 2. MAX8742 Functional Diagram

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 32 33

MAX8741/MAX8742 1

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Rainbow-electronics MAX8742 Manual de usuario Pagina 14

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