Texas Instruments High-Performance Analog AC DC Converters, Offline Switches UC2848DW

The UC2848DW is an average current mode PWM controller designed for isolated switching converters, capable of operating at frequencies up to 1 MHz. It features primary side control with DC control of secondary side current, ensuring well-defined peak switch current and maximum average inductor current, which helps prevent runaway conditions during short circuits. The device includes a high current totem pole output driver rated for 2A peak, a wide bandwidth current error amplifier, and a precision 5V reference with 1% accuracy. Key protective features include an undervoltage lockout (UVLO) that monitors VCC, VIN, and VREF, ensuring safe operation by holding the output low during undervoltage conditions. The UC2848DW also incorporates a maximum duty cycle clamp and a volt-second product clamp to prevent transformer core saturation, optimizing transformer and switch usage for reduced system size and cost. The device is available in a 16-pin SOIC package and operates over a temperature range of -40¬8C to 85¬8C.