BD521GOFJ datasheet(5/20 Pages) ROHM

Part #	BD521GOFJ

Description	AC/DC controller IC for LED lighting

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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BD521GOFJ

Block Diagram

Starter

VCC (2)

Vin

LOGIC

12V

Clamper

200ns

L.E.B.

150us

Mask

S

R

Q

RS

TSD

VCCUVLO

VCCRECHG

VCCOVP

OCP

NOUT

ZTCOMP

NOUT

STARTCOMP

Max

Freq.

Power

Supply

VCCUVLO

VREF4V

R2

DRIVER

ZT (1)

GND (7)

0.8V

13V/

8.7V

13.5V/

8.2V

27.5V/

23.5V

110mV/

200mV

1MΩ

2.95V

Istart1=0.35mA

Istart2=6mA

Istart3=6uA

CHG (3)

R1

F1

CIN

C1

C3

D1

L2

CO

LED+

LED-

EAMP

0.6V

COMP (6)

OSC

C2

D2

LPF (8)

RO

R3

CB

L1

DA1

R4

ROUT

DOUT

Q1

OUT (4)

CS (5)

DZ2

Q2

DZ1

Figure 4. Block Diagram

5/16

TSZ02201-0F4F0C300100-1-2

20.Apr.2016 Rev.002

www.rohm.com

TSZ22111・15・001

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