L4992 Просмотр технического описания (PDF) - STMicroelectronics

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производитель

L4992

TRIPLE OUTPUT POWER SUPPLY CONTROLLER

STMicroelectronics 

L4992

APPLICATION IDEAS

Figure 22: Application with Split Supply

VOUT1

5.1V/3A

R1

C3

Q1

L1

C1

D1 Q3

C16

C7

C5

C6

D3

D4

C15

12V BUS

5V BUS

C17

Q2 D5

T1

C2

Q4 D2

C8

R2

C4

VOUT2

3.3V/3A

29 30 31 32

6

1 2 3 24

25 26 27 28 21

5

19

4

7

R3

R5

R6

L4992

20

18

R7

R8

R4

11

16

C10

14 8

17

9

12 13

10

22 15

S3

S4

C9

C11

C12 C13 C14

PWROK

REG12 S1

C18

S2 R9

VOUT3

12V/0.12A

D98IN813

Figure 23: Low output voltage.

Rsense

RB

L4992

6(19)

5(20)

22

7(18)

RA

12V

C18

C9

(C10)

R3(R4)

RB BALANCES ZCD COMPARATOR

VO <5.1V

(VO <3.3V)

MIN.

LOAD

D98IN814

24/26

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