The UC1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. It includes a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers. Protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs are also included. The UC1526 can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. It is characterized for operation over the full military temperature range of -55°C to +125°C.
The document describes the UC1526, UC2526, and UC3526 as high performance monolithic pulse width modulator circuits designed for fixed-frequency switching regulators and other power control applications. These devices include a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers.
| Oscillator Frequency Range | 1Hz to 400kHz |
|---|---|
| Operating Junction Temperature (UC1526) | -55°C to +125°C |
| Source/Sink Load Current (each output) | 0 to 100mA |
The UC2526 is characterized for operation from -25°C to +85°C.
All digital control ports are TTL and B-series CMOS compatible.