FL7760BM6X Integrated Circuits (ICs)

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The FL7760BM6X is a frequency and current controlled step-up power management integrated circuit (PMIC-LED driver). It is designed to effectively and efficiently boost and constant current control to drive high power LEDs (light emitting diode) in automotive and industrial applications. The device operates at a high frequency, to minimize the component size, and is able to deliver up to 15 W of power to the LEDs. Additionally, the device operates with tight constant current control circuits and switch current balance across the output channels. Furthermore, the device integrates over temperature protection, short ciruit protection, an open LED protection and under voltage lock-out (UVLO) functions to protect the connected LEDs.

The FL7760BM6X features a high input voltage range from 4.5 V to 28 V, and a wide output voltage range of up to 50 V for LED chain length of up to 11 LEDs. The device also features a built-in dimming control circuit that supports OVP (over voltage protection) and soft start/stop. The driver supports PWM and analog dimming. The analog dimming control range is adjustable, with input voltage varying from 0 V to 1.7 V, allowing the output current to be linearly controlled. The device also features a low quiescent current, low stand-by current, and low dropout voltage.

The working principle of the FL7760BM6X is for the precision internal current sampling circuit to monitor the output current and regulate the peak current in the output chain of LEDs, thus achieving constant current mode driving. In constant current mode, the internal sample and hold circuit and the voltage feedback loop are used. When the output current increases, the control loop controls the external control switch (MOSFET) by using the PWM frequency and output inductor current to maintain the required current value.

The FL7760BM6X is generally recommended for use in various applications where LED lighting is needed. Examples include automotive lighting, such as tail lamps, headlamps, turn signals, and fog lamps; general industrial applications, such as flood and street lamps; medical applications, such as LED display lighting; and household LED lighting, such as interior lighting, pathway lighting, and decorative lighting. The device also has a wide operating temperature range, making it suitable for outdoor applications.

The FL7760BM6X offers a powerful, efficient and complete solution for automotive and industrial LED lighting applications. Its simple external circuit and wide operating temperature range make it an excellent choice for driving high power LEDs with a wide range of input and output voltage requirements. The device also features a high switching frequency and current control circuit, which helps keep the size of the LED driver system small and eliminates the need for bulky inductors.

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