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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 Tstg
-55 to 150 ℃
Note: Stresses beyond those listed under “absolute
maximum ratings” may cause permanent damage to the
device. These are stress ratings only, functional operation of
the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not
implied. Exposure to absolute maximum-rated conditions for
extended periods may affect device reliability.
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Datasheet OB_DOC_DS_3613XA4
OB3613x Series
High PF Non-Isolated Buck LED Lighting Power Switch
Output Power Table
Product
Condition
90Vac~264Vac Input
220Vac±20% Input
OB3613MCP
IOUT≤0.15A
4.9W
8.7W
OB3613NCP
IOUT≤0.20A
6.8W
10.0W
OB3613PJP
IOUT≤0.2A
9.1W
15.8W
OB3613PAP
IOUT≤0.30A
14.0W
23.2W
OB3613RJP
IOUT≤0.30A
11.3W
14.8W
OB3613RAP
IOUT≤0.30A
15.0W
27.0W
OB3613TJP
IOUT≤0.30A
12.0W
18.4W
OB3613TAP
IOUT≤0.40A
19.0W
28.8W
Note: Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50℃ ambient
and 60℃ temperature rise. Higher output power is possible with extra added heat sink、air circulation and decrease output current to reduce thermal resistance.
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Datasheet OB_DOC_DS_3613XA4
Marking Information
OB3613x Series
High PF Non-Isolated Buck LED Lighting Power Switch
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Datasheet OB_DOC_DS_3613XA4
OB3613x Series
High PF Non-Isolated Buck LED Lighting Power Switch
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TERMINAL ASSIGNMENTS for OB3613MCP,OB3613NCP, OB3613PAP, OB3613RAP and OB3613TAP
Pin Num Pin Name 1 VDD 2 FB
3 COMP
I/O Description
P Power supply input.
I
The voltage feedback terminal. Connected to resistor divider from output voltage.
O
Loop compensation pin. A capacitor is connected between COMP and GND.
4 CS I Current sensing terminal.
5,6
DRAIN
I MOSFET Drain terminal
7
GND
P Power Ground, s.