Technical Note

2/22

www.rohm.com

2011.08 - Rev.C

© 2010 ROHM Co., Ltd. All rights reserved.

BD8112EFV-M

●

Operating conditions (Ta=25℃)

Parameter

Symbol

Limits

Unit

Power supply voltage

5.0～30

V

Oscillating frequency range

250～600

kHz

External synchronization

frequency range

*4 *5

fosc～600

kHz

External synchronization

pulse duty range

40～60

%

*4

Connect SYNC to GND or OPEN when not using external frequency synchronization.

*5

Do not switch between internal and external synchronization when an external synchronization signal is input to the device.

●

Parameter

Symbol

Limits

Unit

Conditions

Min

Typ

Max.

Circuit current

-

7

14

mA

EN=Hi, SYNC=Hi, RT=OPEN

Standby current

-

4

8

µA

EN=Low

[VREG Block (VREG)]

Reference voltage

4.5

5

5.5

V

[OUTH Block]

OUTH high-side ON resistance

1.5

3.5

7.0

Ω

OUTH low-side ON resistance

1.0

2.5

5.0

Ω

Over-current protection

operating voltage

-0.66

-0.6

-0.54

V

[OUTL Block]

OUTL high-side ON resistance

2.0

4.0

8.0

Ω

OUTL low –side ON resistance

1.0

2.5

5.0

Ω

[SW Block]

SW low -side ON resistance

2.0

4.5

9.0

Ω

[Error Amplifie Block]

LED voltage

0.9

1.0

1.1

V

COMP sink current

15

25

35

µA

COMP source current

-35

-25

-15

µA

[Oscillator Block]

Oscillating frequency

285

300

315

KHz

◎

This product is not designed for use in radioactive environments.