BD9731KV 查看數據表（PDF） - ROHM Semiconductor

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BD9731KV

5-channel switching regulator controller

ROHM Semiconductor 

Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=6V, fosc=0.20MHz, STB1~5=3V)

Parameter

Symbol Min. Typ. Max. Unit

Conditions

Circuit current at stand-by

Ist

—

—

10

µA STB1~5=0V

Circuit current at operating

Icc

—

4.5

9.5

mA

<Reference voltage>

Output voltage

Vref 1.485 1.5 1.515

V Iref=–1mA

<Internal regulator>

Output voltage REGA

VREGA 2.4

2.5

2.6

V Ireg=–1mA

<Shutdown at overloaded>

CH1~5 threshold voltage

Vsc1~5 1.425

1.5

1.575

V VSCP1~5=2V~1V

<Protection circuit>

SCP pin detection circuit

Triangle wave oscillator

Vtsc

0.90

1.0

1.10

V VSCP=0V~1.5V

Oscillating frequency

fosc1 0.179 0.20 0.221 MHz RT=24kΩ, CT=220pF

<Output>

Output voltage 'H' at operating VSATH Vcc–0.3 Vcc–0.1 —

V Io=10mA

Output voltage 'L' at operating VSATL

—

0.1

0.3

V Io=–10mA

Maximum output source current IOSOURCE —

—

30

mA

Maximum output sink current

Iosink

—

<STB1~5>

—

–30

mA

STB pin

Operating VSTBL

2.0

—

—

V

control voltage Non-operating VSTBH –0.3

—

0.3

V

Block Diagram

33 29

VREF 34

REG A

VOLTAGE

REFERENCE

To Control

Block

REG D

31 VREGD

U.V.L.O

TIMER LATCH

SQ

R

To-Divers

DTC1 43

FB1 40

INV1 41

NON1 42

SCP1 39

DTC2 38

FB2 36

INV2 35

SCP2 37

DTC3 26

FB3 24

INV3 23

SCP3 25

DTC4 19

FB4 21

INV4 22

SCP4 20

ERRAMP1

SCPcomp1

ERRAMP2

SCPcomp2

ERRAMP3

SCPcomp3

ERRAMP4

SCPcomp4

PWM

PWM

PWM

PWM

Pch DRIVER

Pch DRIVER

Pch DRIVER

Pch DRIVER

3 PVCC1

2 OUT1

1 RBIAS1

4 OUT2

5 RBIAS2

44 PGND1

8 PVCC2

7 OUT3

6 RBIAS3

9 OUT4

10 RBIAS4

DTC5 14

FB5 16

INV5 17

NON5 18

SCP5 15

ERRAMP5

SCPcomp5

TRIANGLE

FORM

OSC

27 28

PWM

OSC

BUFFER

ON/OFF

LOGIC

48 47 46 45

Nch DRIVER

13 RBIAS5

12 OUT5

11 PGND2

BD9731KV

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