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2022-09-24 23:33:15
U1825DW-High Speed PWM Controller
The high frequency PWM control IC UC1825 series is most suitable for switching power supply applications. Special attention is paid to error amplifiers by comparing to minimize propagation delay and logic circuits while maximizing bandwidth and slew rate. The controller is designed for use in either current input voltage capable mode or voltage mode feeds. Protection circuitry includes current limit comparators with a 1V threshold, a TTL compatible shutdown port, and a soft-start pin that doubles as a maximum duty cycle clamp. This logic is fully dither free to operate and disables multiple pulse latch outputs. The undervoltage lockout section with a hysteresis of 800mV guarantees low start-up current. During undervoltage lockout, the output is high impedance. These devices feature totem pole output sources and are designed to sink high peak current capacitive loads such as gates, power MOSFETs. It is a high-level design for the country.