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PDF OB3663 Data sheet ( Hoja de datos )
| Número de pieza | OB3663 | |
| Descripción | Dimmable Flyback PSR Controller | |
| Fabricantes | On-Bright | |
| Logotipo |  |
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OB3663
Dimmable Flyback PSR Controller
GENERAL DESCRIPTION
The OB3663 is a high performance single stage
AC/DC fly-back controller for dimmable LED
luminaires. The OB3663 integrates advanced
digital processing core to eliminate visible flicker.
OB3663 offers fast startup feature, constant
on-time control for power factor correction (PFC),
zero current detector (ZCD) to ensure transition
mode (TM) operation, and accurate current
regulation.
OB3663 offers comprehensive protection
coverage including VDD under voltage lockout
(UVLO), VDD over voltage protection, load voltage
over voltage protection, cycle-by-cycle current
limiting, over temperature protection, LED string
open/short protection, driver output clamping for
external power MOSFET protection, current sense
resistor short protection, and transformer
saturation protection.
OB3663 is offered in SOP14 package (OB3663CP)
and SSOP10 package (OB3663LP) .
FEATURES
Primary-Side Control with Single Stage PFC
Topology
No visible flicker
No bleeder design
Total harmonic distortion <20% with PF>0.9
Fast startup time (<0.5s without dimmer)
Transition Mode (TM) operation to achieve
high efficiency
High current accuracy
Source driving operation mode
Cycle-by-Cycle Current Limiting (OCP)
VDD Over Voltage Protection
Output Over Voltage Protection
Over-Temperature Protection
VDD Under Voltage Lockout (UVLO)
LED string open protection
LED string short protection
Current sense resistor short/open protection
Transformer saturation protection
APPLICATIONS
Dimmable LED lighting
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_366304
1 page  
Functional Block Diagram
REF
VDD
OB3663
Dimmable Flyback PSR Controller
LDO
FB +
Vth_ovp
_
Vth_zcd
+
_
OTP
UVLO
Voltage &
Current
Reference
Vref
Iref
Logic
Control
CLAMP
GATE
RAMP
Generator
+
_
SD
OCP
BL
TRAIC
Control
Vth_ocp
Constant current
regulation
SW
CS
I_DET (OPT)
PHASE
COMP
GND
Figure2: OB3663 Functional Block Diagram
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_366304
5 Page 
SSOP10 PACKAGE OUTLINE DIMENSIONS
OB3663
Dimmable Flyback PSR Controller
Symbol
A
A1
A2
b
C
D
E
E1
e
L
θ
Dimensions In Millimeters
Min Max
- 1.750
0.100
0.250
1.300
1.550
0.330
0.510
0.170
0.260
4.700
5.100
5.800
6.200
3.700
4.100
1.000(BSC)
0.400
1.270
0º 8º
Dimensions In Inches
Min Max
- 0.069
0.004
0.010
0.051
0.061
0.013
0.020
0.007
0.010
0.185
0.201
0.228
0.244
0.146
0.161
0.039(BSC)
0.016
0.050
0º 8º
©On-Bright Electronics
Confidential
- 11 -
Preliminary Datasheet
OB_DOC_DS_366304
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet OB3663.PDF ] | |
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