SE3912 is a high performance offline PWM
controller for low power AC/DC charger and adaptor
applications. It operates in primary-side regulation.
Consequently, opto-coupler and voltage reference
IC such as SE431 could be eliminated. Proprietary
Constant Voltage (CV) and Constant Current(CC)
control are integrated.
In CC control, the current and output power setting
can be adjusted externally by the sense resistor Rs
at CS pin. In CV control, multi-mode operations are
utilized to achieve high performance and high
efficiency. In addition， good load regulation is
achieved by the builtin wireloss compensation.
SE3912 offers power-on soft-start control and
protection coverage with auto-recovery features
including Cycle-by Cycle current limiting， VCC
UVLO,OTP, SCP. Excellent EMI performance is
achieved with frequency shufling technique.
SESE3912 is available in SOT23-6 packages.
High precision constant voltage(CV) and
constant current (CC) output.
Primary-Side- Regulation without secondary
voltage reference and Opto-coupler.
Programmable CV and CC Regulation.
Built- in Adaptive Peak Current Regulation
Programmable wireloss Compensation
Power-on Soft -Start.
Flyback Topology in DCM Operation
Built-in Leading Edge Blanking(LEB)
Cycle- by-Cycle Current Limiting
VCC under voltage lockout (UVLO).
Short Circuit Protection.
Over Temperature Protection.
Available in SOT23-6 Packages.
RoHS Compliant and Lead (Pb)-Free
应用
Cell Phone Charger
Small Power Adaptor
Lower Power LED drivers
Linear Regulator/RCC Replacement.