Datasheet

Datasheet

11/21

TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

© 2013 ROHM Co., Ltd. All rights reserved.

www.rohm.com

TSZ22111・15・001

BD6346FV

●Application circuit example(Constant values are for reference)

3)

PWM control motor variable speed for application by input pulse signal (direct PWM input)

ex. external PWM signal duty control directly rotation speed for application. Its not necessary to set minimum

rotation speed.

Control input terminal setting of PWM control motor variable speed by pulse input for application

In case of PWM control with OSC terminal is shorted GND, control input terminal (CONT, MIN) is showed in Fig.

28,29. But CONT terminal setting Pull-up or OPEN, Motor is state of constant rotation speed.

REF

OK

Setting Pull-up

( torque is ON)

CONT

Setting Pull-down

(prohibition: torque is OFF)

REF

CONT

NG

CONT

REF

Pulse input within CONT

input voltage range

OK

PWM

Fig. 27 Direct PWM application

Fig. 28 PWM control by input pulse signal (OSC terminal is shorted GND), CONT terminal setting

REF

OK

Setting OPEN(torque is

ON,internal resistance Pull-up)

CONT

REF

OK

Setting Pull-up

( torque is ON )

MIN

Setting Pull-down

(prohibition: test-mode input

REF

MIN

NG

Fig. 29 PWM control by input pulse signal (OSC terminal is shorted GND), MIN terminal setting

REF

NG

Setting OPEN

(prohibition:input is irregular)

MIN

MIN

REF

Setting under REF voltage

(prohibition:input unrelated

control)

NG

(

)

( )

Soft-Start time setting

Stable REF for provision

Input Direct PWM

MIN terminal is connected REF

terminal, invalidate minimum

output duty setting.

Absolute Output Voltage 20V

Absolute Output Current 1.2A

FG open collector protection

Connect a pull-up external

resistor

Detect current to limit motor

current,

pay

attention

to

wattage. Because large current

is present.

Provision for Vcc-rise by kick-back

the bypass capacitor, diode must be

routed Vcc terminal as near as

possible

Against reverse FAN

connector for provision

Input Direct PWM,

OSC terminal is shorted

Sync-Startup time setting

Its necessary to choose the

best capacitor value for

optimum start-up operation

Select slope current setting

PWM

0.47µF

to 4.7µF

0.1µF to

Vcc

DET.

COMP

TOSC

OSC

W

Vcc

V

COM

FG

GND

GND

GND

SS

SEL

MIN

CONT

U

RNF

GND

GND

GND

REF

Vcl

VccVcc

PWM

COMP

SIGNAL

OUTPUT

LOCK

PROTECT

150° SOFT

SWITCH

QUICK

START

PRE DRIVER

DETECT

LEVEL

UVLO

TOSC

TSD

BEMF

DETECT

REF

OSC

＋

−

SIG

1

2

3

4

5

6

7

15

16

8

14

12

11

10

9

13

20

19

18

17

4.7µF to

680pF to

2200pF

0.22Ω to

REF

0Ω to

to 10kΩ

SOFT START

& CURRENT

LIMIT

COMP

CONTROL

LOGIC