The AL8860 is a 40 V, 1.5 A buck LED driver from Diodes, offering wide input range, dimming control, and up to 97 % efficiency.
The AL8860 is a hysteresis‑mode DC‑DC step‑down converter designed to drive single or multiple series‑connected LEDs. It operates from a 4.5 V to 40 V input and provides up to 1.5 A output current, with PWM or DC voltage dimming via the CTRL pin. Features include soft‑start, LED short protection, over‑temperature protection, and a switching frequency up to 1 MHz.
Typical applications are low‑voltage halogen retrofit, industrial lighting, illuminated signs, and multi‑channel external drivers. The device is offered in Pb‑free TSOT25 and MSOP‑8EP packages, with detailed pin assignments and recommended layout information provided.
| Input Voltage Range | 4.5 V – 40 V |
|---|---|
| Output Current | up to 1.5 A |
| Switching Frequency | up to 1 MHz |
| Efficiency | up to 97 % |
| Soft‑Start | adjustable via external capacitor |
| LED Short Protection | enabled |
| Over‑Temperature Protection | OTP |
| Recommended Analog Dimming Range | 5 % – 100 % |
| Current Set Resistor Formula | I_OUT_NOM = 0.1 / Rs |
| Package Types | TSOT25, MSOP‑8EP |
The device supports an analog dimming range of 5 % to 100 %.
The output current is set by an external resistor on the SET pin using the formula I_OUT_NOM = 0.1 / Rs.
The AL8860 is offered in Pb‑free TSOT25 and MSOP‑8EP packages.
The device can operate at a switching frequency up to 1 MHz.