BD8158FVM Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BD8158FVM

High-efficiency Step-up Switching Regulators with Built-in Power MOSFET

ROHM Semiconductor 

BD8152FVM, BD8158FVM

Technical Note

٨Application Examples

Although ROHM is sure that the application examples are recommendable ones, further check the characteristics of

components that require high precision before using them.

When a circuit is used modifying the externally connected circuit constant, be sure to decide allowing sufficient margins

considering the dispersion of values by external parts as well as our IC including not only the static but also the transient

characteristic.For the patent, we have not acquired the sufficient confirmation. Please acknowledge the status.

(1) When the charge pump is removed from the DC/DC converter to make it 3-channel output mode:

It is possible to create the charge pump by using the switching operation of DC/DC converter. When the application

shown in the following diagram is used, 1-channel DC/DC converter output, 1-channel positive side charge pump and

1-channel negative side charge pump can be output as a total of 3-channels.

L1 10µH

D1

RB161M-20

VCC

C1

10µF

C2

0.01µF



8

SS

7

FCLK

6

VCC

5

SW

SLOPE

O SC

CU R REN T

SENSE

+

SOFT

START

Set LOGIC DRV

Reset

SDWN

P+W-M

OCP

E- R+R

UVLO/TSD

1.245V

VREF

COMP

1

FB

2

ENB

3

G ND

4

R3

5.1kȍ

C3

3300pF

R1

110kȍ

R2

18kȍ

Vo

9V

C0

10µF

0.1µF

0.1µF

DAN217U

1µF

0.1µF

1µF

1kȍ

UDZ

Series

DAN217U

100kȍ

2SD2657k

VGH

1µF

1µF 1kȍ

2SB1695k

UDZ

Series

100kȍ

VGL

1µF

Fig. 30 3ch Application Circuit Diagram Example

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© 2011 ROHM Co., Ltd. All rights reserved.

11/17

2011.08 - Rev.C

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