Wuxi I-core Elec AiP3845DA8.TB

This series of devices are fixed-frequency PWM control circuits designed primarily to provide current-mode control for off-line power supplies or DC-DC converters, requiring minimal external components. Internally integrated are a frequency-adjustable oscillator, a precision reference voltage source with temperature compensation, a high-gain error amplifier, and a current sensing comparator. The output stage features a push-pull configuration capable of delivering high source and sink current, suitable for driving MOSFET power devices. The devices incorporate comprehensive protection functions, including UVLO and current limiting protection. The key differences among device variants lie in the UVLO threshold voltages and the maximum allowable duty cycle. For example, the AiP3842 and AiP3844 have UVLO turn-on/turn-off thresholds of 16V and 10V respectively, while the AiP3843 and AiP3845 have thresholds of 8.8V and 7.6V respectively. The AiP3842 and AiP3843 can operate at duty cycles approaching 100%, whereas the AiP3844 and AiP3845 have a maximum duty cycle of approximately 50%.

• Low startup current (<0.5mA)
• Maximum duty cycle clamp function
• UVLO with hysteresis
• Operating frequency up to 500kHz
• Package: SOP8/DIP8
• Operating temperature range: -40℃ ~ 125℃