AP880X DC-DC converters reduce component reliance

The AP880X step-down DC-DC converters need the support of just four components.

By operating at switching frequencies up to 600kHz, the AP880Xs allow the use of smaller and lower cost inductors and capacitors.

The AP880X range drives series-connected LEDs with a constant current.

The range supports up to 13 LEDs from voltage sources of between eight and 48V.

The drivers ensure uniform LED brightness and eliminate the need for ballast resistors.

They suit a range of general illumination duties including signs, architectural and emergency lighting and MR16 lamp replacement.

For an operating voltage range of eight to 28V, the AP8800 will furnish a string of seven LEDs with a current up to 350mA, providing a cost-effective match for 1W LED systems.

For higher output power, the AP8801 produces a drive current of 500mA from an operating voltage of eight to 48V, to support up to 13 series-connected LEDs.

The AP8802 meets the requirements of higher power 3W LED systems.

For an operating voltage of eight to 48V, the driver will provide up to 13 LEDs with a constant LED current of up to 1A.

All three devices deliver efficiencies up to 92 per cent.

To reduce the stress on LEDs, the AP880X drivers feature an integrated soft-start function, which helps to extend LED lifetime.

To increase design flexibility, the drivers also offer the choice of PWM and DC input dimming control.

All devices come in the industry-standard SOP-8L package, with the AP8800 and AP8801 also available in MSOP-8L and the AP8802 in exposed pad DFN and SOP-8L packages.