FAN5609 is a dimmable LED driver that supports all voltage ranges of LEDs and automatically adjusts the output voltage according to the highest voltage of the LED. It has an efficiency of up to 86%, low EMI, low ripple, and can output current through PWM control. It also has soft start, short circuit protection, and minimal external components.
The FAN5609 LED driver provides a parallel‑LED solution that automatically adapts its output voltage to the highest forward‑voltage diode. It integrates a charge‑pump converter with three operating modes (linear, 3:2, and 2:1) to maintain high efficiency across an input range of 2.7 V to 5.5 V, and includes a built‑in DAC for digital or PWM brightness control.
The device requires minimal external components—only two bucket capacitors and two input/output capacitors—and offers features such as soft‑start, short‑circuit protection, and shutdown isolation. It is available in 14‑lead TSSOP and 16‑lead MLP packages, making it suitable for cell phones, handheld computers, keyboard backlights, and LED displays.
| Input Voltage Range | 2.7 V – 5.5 V |
|---|---|
| Maximum Output Current | 80 mA (4 × 20 mA) |
| Efficiency | up to 86 % |
| Operating Frequency | 1 MHz |
| Shutdown Current | < 2 µA |
The device operates with an input voltage from 2.7 V to 5.5 V.
It can supply up to 80 mA total, which corresponds to four LEDs at 20 mA each.
In shutdown mode the current consumption is less than 2 µA.