OB2269AP PWM Controller IC

The highly integrated current mode PWM control IC OB2269AP is designed for high performance, low standby power, and cost-effective offline fly-back converter applications with power levels above 20W. PWM switching frequency can be externally programmed and is reduced to a small range during regular operation. To reduce switching loss, the IC runs in extended “burst mode” in no load or low load conditions. Higher conversion efficiency and lower standby power are therefore attained. With the OB2268/9, VDD’s low startup current and low operational current help to create a dependable power on startup design. Thus, a big-value resistor could be utilized in the startup circuit to reduce standby power. Internal slope correction enhances the stability of the system’s significant signal and lowers the possibility of sub-harmonic oscillation at a high PWM duty cycle.

Pin details: 1-GND, 2-FB, 3-Vin, 4-RI, 5-RT, 6-SENSE, 7-VDD, 8-GATE

Applications: It’s used in laptop power Adapters, PC, TV, Setup box, Power supply circuits, SMPS, Battery charger

Features

• Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design

• For to start the IC, the needed current is 4Microamp 

• Its low operating current is 2.3mA

• It provides audio noise-free operation

• It has an under voltage and over-voltage protection circuit.

Specification