Automotive fog light turn signal brake light tail light dedicated IC can provide solutions and sample test

The AP2401 is a PWM operating mode with high efficiency, simple peripherals, and built-in power transistors. It is a high precision step-down LED constant current driver IC for 5-100V input. The maximum output power is up to 10W and the maximum current is 1A.

The AP2401 can realize two-stage function switching, and switch two function modes through MODE2/3: full-on, half-bright, full-on/half-on/flash cycle mode.

AP2401 operating frequency is fixed at 150KHZ left

Right, with built-in frequency-hopping circuit, can reduce EMI interference to other devices. In addition, the average current sampling mode is used to improve the current accuracy under a wide input voltage.

The AP2401 has an output short-circuit protection function. Under 5V to 100V input conditions, a short-time short circuit will not damage the power supply unit.

The AP2401 also has the function of over-temperature regulation. When the temperature inside the chip reaches about 140 °C, the output current is automatically reduced.
Application schematic Features

Wide input voltage range: 5V ~ 100V

Current range can be set: 10mA~1000mA

Fixed working frequency: 150KHZ

Built-in frequency-hopping circuit to reduce EMI to other devices

Interference average current mode sampling, higher constant current accuracy

0-100% duty cycle control, no current node transition

Output short circuit protection

Over-temperature protection two function mode: full light / semi-bright / three-function cycle

SOT23-6 package

Application field

Electric vehicle, motorcycle lighting

Car light flashlight

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IC schematic:

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