L5994 Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

L5994

ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER

STMicroelectronics 

L5994 - L5994A

BLOCK DIAGRAM

SOFT1

SOFT2

8

17

6

I1SNS

5

V1SNS

7

COMP1

SLOPE

+

ERROR SUMMING

-

+

∑

-

+

SOFT

SOFT

I1SNS V1SNS V2SNS I2SNS

+

ERROR SUMMING

-

∑+

-

+

SLOPE

19

I2SNS

20

V2SNS

18

COMP2

1

H1STRAP

-

VREF

OVER CURRENT

COMPARATOR

+

OVER CURRENT

COMPARATOR

+

-

VREF

24

H2STRAP

32

H1GATE

31

H1SRC

30

R1GATE

Hside

REG5

Lside

LOGIC

AND

SHOOT-

THROUGH

CONTROL

-

ZERO CROSSING

COMPARATOR

+

-

PULSE SKIPPING

COMPARATOR

+

-

-

ZERO CROSSING

COMPARATOR

+

-

PULSE SKIPPING

COMPARATOR

+

-

LOGIC

AND

SHOOT-

THROUGH

CONTROL

Hside

PREG5

Lside

25

H2GATE

26

H2SRC

27

R2GATE

28

PGND

PREG5

29

4

W5SW

2

VIN

SREG5 3

12

VREF

SGND

13

LINEAR

REGULATOR

-

+

SWITCH

COMPARATOR

VREF BUFFER +

-

V5SW

OVERVOLT

COMPARATOR

UNDERVOLT

COMPARATOR

4.7V

VREF

POWER MANAGEMENT

&

SYSTEM SUPERVISOR

16

11

10

14

9

23

RUN2 RUN1 PWROK1 NOSKIP CRST PWROK2

VREF

REG12

LDO

OSCILLATOR &

SYNCHRONIZATION

21

VDRLIN

22

VFBLIN

15

OSC

D98IN864A

ELECTRICAL CHARACTERISTICS (Vin = 12V; Tj = 25°C; Vosc = GND; unless otherwise specified.)

Symbol

Parameter

Test Condition

Min. Typ. Max. Unit

DC CHARACTERISTIC

Vin Input supply voltage

V1out,4V

4.75

25

V

I2

Operating quiescent current

R1GATE= R2GATE = OPEN

H1GATE = H2GATE = OPEN

RUN1= RUN2 = SREG5

(DRIVERS OFF)

1.1

1.4

mA

I2

Stand by current

RUNQ=RUN2=GND

NOSKIP=GND

Vin=12V

Vin=20V

50

90

µA

60

100

µA

SECTION 1 PWM CONTROLLER

V1out V1SNS feedback voltage

Vin = 5V to 20V

NOSKIP = REG5

Vi1sns-Vv1sns = 0 to 40mA

1.81 1.89 1.97

V

V6-V5 Overcurrent Threshold current VSOFT1 = 3.1V

37

50

63

mV

V6-V5 Pulse skipping mode threshold

voltage

Vin > 6.8V

Vin < 5.8V

13

mV

6.5

mV

3/26

Share Link: