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OB3613x Series
High PF Non-Isolated Buck LED Lighting Power Switch
GENERAL DESCRIPTION
OB3613x is a high power factor, highly integrated buck regulator with advanced features to provide high efficiency control and high precision constant current output for LED lighting applications.
OB3613x integrates a MOSFET to decrease physical volume. The proprietary CC control scheme is used and the system can achieve high power factor with constant on-time control scheme.
OB3613x offers comprehensive protection coverage with auto-recovery features including LED open loop protection, LED short circuit protection, cycle-by-cycle current limiting, built-in leading edge blanking, VDD under voltage lockout (UVLO), etc.
OB3613x is offered in SOP8, SOP7 or DIP8 package.
FEATURES
Buck topology with high power factor Integrated a HV MOSFET High precision constant current regulation at
universal AC input Low system cost and high efficiency Quasi-Resonant operation Programmable CC regulation LED short circuit protection LED open loop protection Cycle-by-cycle current limiting Built-in leading edge blanking (LEB) VDD under voltage lockout with hysteresis VDD over voltage protection Over temperature protection (OTP)
APPLICATIONS
LED lighting
TYPICAL APPLICATION
~ AC
OB3613x
DRAIN
CS
DRAIN
COMP FB
GND
VDD
Figure1: OB3613x Typical Application Schematic
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Datasheet OB_DOC_DS_3613XA4
OB3613x Series
High PF Non-Isolated Buck LED Lighting Power Switch
GENERAL INFORMATION
Pin Configuration
VDD 1
8
GND
VDD 1
7 GND
FB 2
7 GND
FB 2
COMP 3
6 Drain
COMP 3
6 Drain
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CS 4
5 Drain
Pin map for SOP-8 package
CS 4
5 Drain
Pin map for SOP-7 package
VDD 1
8 GND
FB 2 COMP 3
7 GND 6 Drain
CS 4
5 Drain
Pin map for DIP-8 package
Ordering Information
Part Number
Description
OB3613MCP
8 Pin SOP, Pb free in Tube
OB3613MCPA 8 Pin SOP, Pb free in T&R
OB3613NCP
8 Pin SOP, Pb free in Tube
OB3613NCPA
8 Pin SOP, Pb free in T&R
OB3613PJP
7 Pin SOP, Pb free in Tube
OB3613PJPA
7 Pin SOP, Pb free in T&R
OB3613PAP
8 Pin DIP, Pb free in Tube
OB3613RJP
7 Pin SOP, Pb free in Tube
OB3613RJPA
7 Pin SOP, Pb free in T&R
OB3613RAP
8 Pin DIP, Pb free in Tube
OB3613TJP
7 Pin SOP, Pb free in Tube
OB3613TJPA
7 Pin SOP, Pb free in T&R
OB3613TAP
8 Pin DIP, Pb free in Tube
Note: All Devices are offered in Pb-free Package if not
otherwise noted.
Recommended Operating Condition
Symbol Parameter
Range
VDD
VDD Supply Voltage 11 to 30V
Package Dissipation Rating
Package
RθJA (℃/W)
SOP-8
90
SOP-7
90
DIP-8
75
Absolute Maximum Ratings
Parameter
Value
VDD Voltage
-0.3 to 40V
DRAIN Voltage
-0.3 to 500V
CS Input Voltage
-0.3 to 7V
FB Input Voltage
-0.3 to 7V
COMP Input Voltage
-0.3 to 7V
Min/Max Operating Junction Temperature TJ
-40 to 150 ℃
Operating Ambient Temperature TA
-40 to 85 ℃
Min/Max Storage Temperature Ts.