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OB3622M Datasheet

High Precision Non-isolated Power Switch

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OB3622M
High Precision Non-isolated Power Switch
GENERAL DESCRIPTION
OB3622M is a high current precision, non-isolated
power switch for LED lighting. It works under
transition mode.
It significantly simplifies the LED lighting system
design by eliminating the auxiliary winding
inductance and works under low current. A 650V
power switch is also integrated into the device.
The LED current can be adjusted externally by the
sense resistor Rs at CS pin and high precision
constant current regulation is realized.
OB3622M offers comprehensive protection
coverage with auto-recovery features including
LED string open protection, LED string short circuit
protection, cycle-by-cycle current limiting, built-in
leading edge blanking, VDD under voltage lockout
(UVLO), over temperature protection (OTP), etc.
OB3622M is offered in SOP8 package.
FEATURES
High precision Constant Current Regulation at
Universal AC input
Sense and supply without auxiliary winding
inductance
Low System Cost and High Efficiency
Low operation current
Programmable CC Regulation
Transition Mode operation
Built-in Primary winding inductance
compensation
LED string short circuit protection
LED string open protection
Cycle-by-Cycle Current Limiting
Built-in Leading Edge Blanking (LEB)
VDD Under Voltage Lockout with Hysteresis
Over temperature protection (OTP)
APPLICATIONS
LED lighting
TYPICAL APPLICATION
~+
AC
+
CS
NC
VDD
SW
GND
GND
Drain
Drain
OB3622M
Output Power Table
Product
Condition
90Vac~264Vac Input
220Vac±20% Input
OB3622M
IOUT0.2A
6.6W
11.3W
Note: Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50ambient
and 60temperature rise. Higher output power is possible with extra added heat sink or air circulation to reduce thermal resistance.
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_3622M00
On-Bright
On-Bright



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