Diodes' new LED driver significantly reduces component count


Diodes has introduced the new AP880X family of LED driver integrated circuits (ICs) to significantly reduce the number and size of external components required for driver circuits. The AP880X step-down DC-DC converter requires only four component support and can operate at switching frequencies up to 600kHz, allowing the use of inductors and capacitors that are more compact and less expensive.

Liang Houquan, director of technology marketing for Diodes Asia Pacific, said: The AP880X series is designed to drive series-connected LEDs with constant current and can support up to 13 LEDs from 8V to 48V. These drivers ensure consistent LED brightness and eliminate the need for ballast resistors, making them suitable for a wide range of high-brightness illumination including signage, architectural and emergency lighting, and MR16 lamp replacement.

The AP8800 devices in the series operate from 8V to 28V and can deliver up to 350mA for a string of seven LEDs, demonstrating the cost-effectiveness of a 1W LED system. For higher output power, the other device, the AP8801, can generate 500mA of drive current from 8V to 48V and supports up to 13 series LEDs.

The third device, the AP8802, meets the needs of higher power 3W LED systems, delivering up to 1A of constant LED current for up to 13 LEDs from 8V to 48V. All three devices are up to 92% efficient.

To reduce LED stress, the AP880X driver features an integrated soft-start feature that helps extend LED life. In addition, these drivers offer a choice of pulse width modulation (PWM) and DC input dimming controls for greater flexibility in design. All devices are available in industry-standard SOP-8L packages, including the AP8800 and AP8801 in the MSOP-8L package, while the AP8802 is available in exposed solder joint DFN and SOP-8L packages.

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