Diodes' AL8860/1Q hysteretic-mode DC/DC buck LED drivers are AEC-Q100 Grade 1 qualified. The drivers operate over a wide input supply voltage range of 4.5 V to 40 V. 4.5 V enables the devices to operate under start-stop conditions while 40 V enables them to withstand load dumps. The LED drivers can drive up to 1.5 A LED current in an MSOP8EP package. The AL8860QMP/1QMP supports PWM and analog dimming through the CTRL/VSET pin. Using an external capacitor on this pin allows a soft-start time to be set. Applying 0.2 V or less to the CTRL/VSET pin turns off the internal power switch and causes the device to enter standby-mode with micropower consumption. The AL8860QMP/1QMP drivers are automotive-compliant and support PPAP documents.
Features
- Wide input voltage range of 4.5 V to 40 V and LED current up to 1.5 A
- Simple solution for LED lamps that must work under start-stop conditions with a minimal number of external components
- Versatile single-pin (CTRL/VSET) for analog/PWM dimming and soft-start
- Wide dynamic range analog dimming
- Fast PWM dimming resolution: 1% to 100%
- Programmable soft-start with an external capacitor on the CTRL/VSET pin
- High switching frequency: up to 1 MHz
- Reduced magnetic component dimensions and cost
- Enables wide operating voltage required for automotive applications
- Inherent protection:
- Short and open LED operation, current-sense resistor short protection (AL8861Q only) and overtemperature protection
- Robust and reliable solution for automotive LED lamps
- High efficiency: up to 95%
Applications
- Automotive interior LED lamps
- Automotive exterior LED lamps
