Datasheet

Datasheet

11/28

BD69730FV

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© 2015 ROHM Co., Ltd. All rights reserved.

TSZ22111・15・001

8.Jun.2015 Rev.001

TSZ02201-0H1H0B101410-1-2

Application circuit example(Constant values are for reference)

2) PWM input application 2

It is an example of the application of inverting the external PWM input, and controlling the rotational speed. In this

application, if the external PWM input is OPEN, it controls by the set maximum rotational speed. Minimum rotational

speed cannot be set.

Figure 26. Application of direct PWM input

To be disable TH terminal, set

TH voltage more than OSC

high level (Typ 2.5V) and less

than REF voltage (Typ 5.0V).

Circuit that input direct PWM

(Ref.) PWM input frequency is

20kHz to 50kHz

＋

PWM

M

470Ω to 1kΩ

0Ω to 2kΩ

0Ω to 2kΩ

2kΩ to 20kΩ

1µF to

1µF to

SIG

0Ω to

100pF

to 1000pF

0.1µF to

H

0Ω to

0.01µF

to 4.7µF

－

200Ω

to 20kΩ

100pF

to 0.01µF

TH

MIN

OSC

FG

SIGNAL

OUTPUT

REF

A1H

VCC

Vcc

H+

A1L

GND

CS

HALL

COMP

HALL

AMP

HB

CONTROL

LOGIC

PRE-

DRIVER

A2L

A2H

REF

REG

REG

OSC

QUICK

START

LOCK

PROTECT

TSD

H-

SS

PWM SOFT

SWITCHING

PWM

COMP

PWM

COMP

HALL

BIAS

SOFT START

& CURRENT

LIMIT COMP

1

2

3

4

5

6

7

8

10

9

14

13

12

11

16

15