BD9853AFV

Technical Note

3/16

www.rohm.com

2009.05 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

●

Electrical Characteristics (Unless otherwise specified, Ta=25℃,Vcc=12V,fosc=1000kHz,STB=3V)

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

【

FET Driver】

On Resistance (OUT1H)

RonP

1.6

3.2

4.8

Ω

OUT=Hi

RonN

1.7

3.4

5.1

Ω

OUT=Lo

On Resistance (OUT1L)

RonP

1.6

3.2

4.8

Ω

OUT=Hi

RonN

1.7

3.4

5.1

Ω

OUT=Lo

On Resistance (OUT2H)

RonP

1.6

3.2

4.5

Ω

OUT=Hi

RonN

1.7

3.4

5.1

Ω

OUT=Lo

On Resistance (OUT2L)

RonP

1.6

3.2

4.8

Ω

OUT=Hi

RonN

1.7

3.4

5.1

Ω

OUT=Lo

Dead Time(Turn ON)

tdtON

30

70

120

ns

*OUTH,L H→L,OUTH=2200pF,OUTL=1000pF

Dead Time(Turn OFF)

tdtOFF

25

60

115

ns

*OUTH,L H→L,OUTH=2200pF,OUTL=1000pF

【

Control Block】

Threshold Voltage

Vstb

0.6

1.5

2.4

V

Sink Current

Istb

6

15

30

μA

【

Soft Start Block】

Soft Start Start-yo Voltage Vstasoft

0.2

0.3

0.4

V

Output OFF when Vscp/SOFT＜Vstass

Standby Voltage

Vstsoft

－

－

40

mV

SCP/SOFT Voltage

Source Current

Isosoft

-3.2

-2.3

-1.4

μA

Vscp/SOFT=0.6V

【

Short Circuit Protection (SCP)】

Timer Start Voltage

Vtime

0.50

0.56

0.62

V

INV Voltage

Threshold Voltage

Vthscp

2.2

2.3

2.4

V

SCP/SOFT Voltage

Standby Voltage

Vstscp

1.21

1.35

1.49

V

SCP/SOFT Voltage (When soft start ends)

Source Current

Isoscp

-3.2

-2.3

-1.4

μA

SCP/SOFT=1.8V

【

Under Voltage Lockout (UVLO)】

Threshold Voltage

Vuvlo

4.0

4.15

4.30

V

Vcc sweep down

Hysteresis Voltage

DVuvlo

0.05

0.1

0.15

V

*

This product is not designed for the protection against radioactive rays.

*

Measurement of dead time

Turn ON

Turn OFF

2.5V

tdtON

OUTH

OUTL

VCC-2.5V

tdtOFF

OUTH

OUTL

VCC-2.5V

2.5V