Document
On-Bright Confidential to EUCHIPS
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
On-Bright Confidential to EUCHIPS
TYPICAL APPLICATION
OB3663
Dimmable Flyback PSR Controller
OB3663
1 PHASE 2 REF
SD 14 BL 13
3 NC
I_DET 12
4 CS
GND 11
AC
5 NC
COMP 10
6 SW 7 GATE
FB 9 VDD 8
Figure1: OB3663CP Typical Application Schematic
Figure2: OB3663LP Typical Application Schematic
©On-Bright Electronics
Confidential 2
Preliminary Datasheet OB_DOC_DS_366304
On-Bright Confidential to EUCHIPS
GENERAL INFORMATION
Package Dissipation Rating
Package
RθJA (℃/W)
SOP14
90
SSOP10
138
Ordering Information
Part Number
Description
OB3663CP
SOP14, Pb free in Tube
OB3663CPA
SOP14, Pb free in T&R
OB3663LP
SSOP10, Pb free in Tube
OB3663LPA
SSOP10, Pb free in T&R
Note1: All Devices are offered in Pb-free Package if not otherwise noted.
OB3663
Dimmable Flyback PSR Controller
Absolute Maximum Ratings
Parameter
VDD Input Voltage to GND
GATE to GND
SW to GND
FB to GND COMP, REF and CS to GND PHASE,I_DET, BL, SD,PD,OPT Operating Ambient Temp. TA Operating Junction Temp. TJ Min/Max Storage Temp. Tstg Lead Temp. (10 Sec)
Value
-0.3V to 24V
-0.7V to 24V
-0.7V to 20V
-0.7V to 7V -0.7V to 7V -0.7V to 5V -40 ~85℃ -40 ~150℃ -55 ~150℃ 260 ℃
Note2: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress r.