High Precision Non-isolated Power Switch
OB3622M is a high current precision, non-isolated
power switch for LED lighting. It works under
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.
High precision Constant Current Regulation at
Universal AC input
Sense and supply without auxiliary winding
Low System Cost and High Efficiency
Low operation current
Programmable CC Regulation
Transition Mode operation
Built-in Primary winding inductance
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)
Output Power Table
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 or air circulation to reduce thermal resistance.