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PDF BD521GOFJ Data sheet ( Hoja de datos )
| Número de pieza | BD521GOFJ | |
| Descripción | AC/DC controller IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
AC/DC Drivers
AC/DC controller IC for LED lighting
BD521GOFJ
General Description
BD521GOFJ is an AC/DC converter for LED lighting.
This IC can be applied to quasi-resonant typed
high-side LED driver application, and the high current
precision and low EMI noise can be achieved.
Moreover, owing to the built-in PFC (Power Factor
Correction) converter, the harmonic is improved.
By choosing the external MOSFET, the LED drivers
for from low power to high power can be achieved. So
that, it can be widely used on from the low power
lighting such as spotlight to the high power lighting
such as base light.
Owing to the external current setting resistance, a
power supply design with a high degree of freedom
can be achieved.
Features
Quasi-resonant Switching Mode + PFC Circuit
Non-isolated Application
Maximum Frequency 300kHz
VCC Pin: Under Voltage Protection
VCC Pin: Over Voltage Protection (Latch)
CS Pin: Leading-Edge-Blanking Function
CS Pin: OPEN Protection Function
LED Over Current Detection Function
Package
SOP-J8
W(Typ) x D(Typ) x H(Max)
4.90mm x 6.00mm x 1.65mm
Key Specifications
Operating Power Supply Voltage Range:
VCC 8.9V to 25.0V
Operating Current: Normal Operation: 400μA (Typ)
Operating Temperature Range: - 40°C to +105°C
Application
LED Bulb, Down-light, Tube Light etc.
Electrical Machineries for LED Lighting
Typical Application Circuit
F1
DA1
Vin
L1
CB CIN
R1
DZ2
Q1 DOUT
ROUT
Q2
U1
R4
RS C3 C2
D1
Figure 1. Application Circuit
C1
R2
R3
D2
DZ1
L2 LED+
RO CO
LED-
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
〇This product has no designed protection against radioactive rays
1/16
TSZ02201-0F4F0C300100-1-2
20.Apr.2016 Rev.002
1 page  
BD521GOFJ
Block Diagram
F1
DA1
Vin
L1
CB CIN
R1
Q2
DZ2
C1 VCC (2)
VCCUVLO
Power
Supply
VREF4V
STARTCOMP
0.8V
VCCRECHG
Istart1=0.35mA
Istart2=6mA
Istart3=6uA
Starter
CHG (3)
ZT (1)
R2
13V/
8.7V
VCCUVLO
13.5V/
8.2V
27.5V/
23.5V
VCCOVP
150us
Mask
ZTCOMP
NOUT
110mV/
200mV
Max
Freq.
LOGIC
12V
Clamper
NOUT
SQ
R
DRIVER
TSD
200ns
L.E.B.
OCP
2.95V
OUT (4)
ROUT
DOUT
VREF4V
1MΩ
CS (5)
R4
R3
Q1
D2
DZ1
EAMP
LPF (8)
GND (7)
OSC
0.6V
COMP (6)
C3
C2
RS
D1
L2
RO
LED+
CO
LED-
Figure 4. Block Diagram
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/16
TSZ02201-0F4F0C300100-1-2
20.Apr.2016 Rev.002
5 Page 
BD521GOFJ
Operation Mode of Protection Circuit
Operation mode of protection functions are shown in Table 2.
Abnormal State
Detection
Table 2. Operation Mode of Protection Circuit
Detection
Release
VCC
UVLO
OVP
CS OCP
TSD
<= 8.2V(Typ)
>=27.5V(Typ)
>=2.95V(Typ)
>=175 oC (Typ)
>= 13.5V (Typ)
Before Latch：<= 23.5V (Typ)
Latched：VCC<= 7.7V (Typ)
<2.95V (Typ)
Before Latch：<= 155 oC (Typ)
Latched：VCC<= 7.7V (Typ)
Protection Operations
IC Stops
(Automatic Recovery)
150μs(Typ)
Timer Latch
Output Stops
(Automatic Recovery)
150μs(Typ)
Timer Latch
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/16
TSZ02201-0F4F0C300100-1-2
20.Apr.2016 Rev.002
11 Page | ||
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