SC4612 데이터 시트보기 (PDF) - Semtech Corporation

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SC4612

Wide Input Range High Performance Synchronous Buck Switching Controller

Semtech Corporation 

SC4612

POWER MANAGEMENT

Application Information (Cont.)

Application Circuit 2: Vin = 24V; Vout = 3.3V @ 20A, Fsw = 500kHz.

R1

560k

U1

SC4612MLP

1

ILIM

C2

200p

2

OSC

PHASE

12

DH 11

C4

3.9n

C3

0.1 3

R3

10k 4

SS/EN

EAO

BST 10

DRV

9

C5

300p

5

FB

DL 8

R4opt

C6

1/1265VV

6

VDD

R6

39.2k

GND

7

D1

MBR0540

R8

0

C8 R9

2.2/10V 0

Q1

H AT 2168H

Q2

H AT 2165H

C9

22/25V _c e r

R5

6.98k

C7

R7

750p 887

Fsw=500kHz

C14A

C14B

470/35V_AL 470/35V_AL

+

Vin=24V

_

C10

0.1

L1

1.5uH@22A

+

C12A C12B C13A

180/4V_PosCap 180/4V 180/4V

C13B Vout=3.3@20A

10/6.3V _c e r

_

Efficiency:

SC4612: 24Vin, 3.3Vout @ 20A

100%

98%

96%

94%

92%

90%

88%

86%

84%

82%

80%

0 2 4 6 8 10 12 14 16 18 20 22

Current, (A)

 2007 Semtech Corp.

18

www.semtech.com

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