FL77904MX Integrated Circuits (ICs)

FL77904MX is a two-channel buck LED driver PMIC (power management integrated circuit) designed for small and medium sized LED lighting applications. It utilizes a single input line for power control, and can be directly connected to the dimmer input to get different brightness levels. FL77904MX operates in a buck-boost mode and employs advanced digital control algorithms to ensure both excellent light quality, low standby power, and high efficiency.

The FL77904MX provides two independent channels for dimming and driving LEDs, so it can not only be used for different adaptable output power, but can also be used for various lighting scenarios such as multiple sets of LEDs for different purposes, automatically changing brightness when environment changes, dimming control and color temperature and tone control.

This PMIC is suitable for driving single color LEDs or multi-channel LEDs, and it available in the industry-standard 16-pin TSSOP package. It has several safety features, such as thermal shutdown and overvoltage protection, making it suitable for lighting applications with stringent safety requirements.

The FL77904MX incorporates smart control logic to achieve linear, accurate, and flicker-free dimming down to 1 % with no external components. It also provides built-in power switch for high efficiency, at a maximum current of 300mA, with a wide dimming range and no color shift. The accuracy of its power regulation is guaranteed by its advanced digital control algorithm and by some features, like high-gain modulation, input voltage feed-forward, and auto-compensation for temperature drift.

The FL77904MX features high voltage PWM dimming and high voltage analog dimming with low EMI characteristics. The high voltage PWM dimming can be implemented with an external PWM generator and the high voltage analog dimming can be used as LED dimmer input, with the dimming effect depends on the input current level though an external resistor. The PWM frequency is adjustable up to 500 kHz, allowing a smooth dimmable output with no visible flicker.

The FL77904MX is suitable for applications with no need of remote control, like downlight or accent lighting applications which require dimming or color temperature control. It is a reliable, efficient and cost effective PMIC which provides excellent lighting quality and flexibility.