Rainbow-electronics MAX799 Manual do Utilizador descarregar pdf (Página 14)

MAX796/MAX797/MAX799

Step-Down Controllers with

Synchronous Rectifier for CPU Power

14 ______________________________________________________________________________________

SHOOT-

THROUGH

CONTROL

30mV

LEVEL

SHIFT

1µs

SINGLE-SHOT

MAIN PWM

COMPARATOR

OSC

LEVEL

SHIFT

CURRENT

LIMIT

24R

2.5V

4µA

SYNCHRONOUS

RECTIFIER CONTROL

REF

SHDN

–100mV

NOTE 1

CSH

CSL

FROM

FEEDBACK

DIVIDER

BST

PGND

SLOPE COMP

SKIP

(MAX797

ONLY)

REF (MAX796)

GND (MAX799)

MAX796, MAX799 ONLY

SECFB

NOTE 1: COMPARATOR INPUT POLARITIES

ARE REVERSED FOR THE MAX799.

Figure 3. PWM Controller Detailed Block Diagram

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 31 32

MAX796/MAX797/MAX799 1
Step-Down Controllers with 1

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Rainbow-electronics MAX799 Manual do Utilizador Página 14

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