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PDF BM521Q25F Data sheet ( Hoja de datos )
| Número de pieza | BM521Q25F | |
| Descripción | AC/DC controller IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
AC/DC Drivers
AC/DC controller IC for LED lighting
Included 650V MOSFET
BM521Q25F
General Description
BM521Q25F is an AC/DC converter for LED lighting,
which has a built-in MOSFET with 650V withstand
voltage. 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 harmonics is improved.
Owing to the start-up circuit with 650V withstand voltage,
the low power consumption is achieved. And owing to
the external current setting resistance, a power supply
design with a high degree of freedom can be achieved.
Owing to the built-in start-up circuit and MOSFET with
650V withstand voltage, a compact application can be
designed easily, and the low-cost can be achieved with
the small BOM size.
Features
Quasi-resonant Switching Mode + PFC Circuit
Non-isolated Application
Built-in 650V Start-up Circuit
Built-in 650V Switching MOSFET
Maximum Frequency 300kHz
VCC Pin: Under Voltage Protection
VCC Pin: Over Voltage Protection (Latch)
SOURCE Pin: Leading-Edge-Blanking Function
SOURCE Pin: OPEN Protection Function
LED Over Current Detection Function
Package
SOP8
W(Typ) x D(Typ) x H(Max)
5.00mm x 6.20mm x 1.71mm
Key Specifications
Operating Power Supply Voltage Range:
VCC: 8.9V to 25.0V
DRAIN: to 650V
Operating Current: Normal Operation: 400μA (Typ)
Operating Temperature Range: - 40°C to +105°C
MOSFET ON Resistance:
4.0Ω (Typ)
Application
LED Bulb, Down-light etc.
Electrical Machineries for LED Lighting
Typical Application Circuit
F1
DA1
Vin
R1
CB
L1
R3
CIN C1
U1
R4 R2
RS
C3
C2
L2
D1
D2
DZ
LED+
+
RO CO
Figure 1. Application Circuit
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
TSZ02201-0F4F0C300090-1-2
20.Apr.2016 Rev.002
1 page  
BM521Q25F
Block Diagram
F1
DA1
Vin
R1
L1
CB CIN
C1
R2
VCC (2)
VCCUVLO
Power
Supply
VREF4V
0.8V
13V/
8.7V
13.5V/
8.2V
27.5V/
23.5V
+ STARTCOMP
-
+ VCCRECHG
-
+ VCCUVLO
-
+ VCCOVP
-
150us
Mask
ZT (1)
NOUT
+ ZTCOMP
-
110mV/
200mV
Max
Freq.
Istart1=0.55mA
Istart2=3mA
Istart3=10uA
HV Starter
DRAIN (4)
LOGIC
12V
Clamper
NOUT
SQ
R
DRIVER
TSD
200ns
L.E.B.
OCP
+
-
2.95V
+
-
OSC
GND (7)
- EAMP
+
0.6V
COMP (6)
C3
VREF4V
1MΩ
SOURCE (5)
LPF (8)
R3
D2
R4
DZ
RS L2
C2
D1
LED+
+
RO CO
LED-
Figure 4. Block Diagram
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/16
TSZ02201-0F4F0C300090-1-2
20.Apr.2016 Rev.002
5 Page 
BM521Q25F
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
SOURCE 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
TSZ02201-0F4F0C300090-1-2
20.Apr.2016 Rev.002
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet BM521Q25F.PDF ] | |
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