PR4402, PR4401 Datasheet - PREMA

PR4402 (PR4401 / PR4402) 0.9V Boost Driver

Vcc PIN Name Vcc PIN Function Description Supply voltage Output voltage, LED connection Ground connection UIxx Gnd Vout Gnd Vout top view Topside marking: "UI" (PR4401) or "UJ" (PR4402) with a two-digit lot code Package SOT23-3 or COB on request © PREMA Semiconductor GmbH 2006-2008 Page 1/12 .

LED DRIVER PR4401/PR4402 0.9V Boost Driver for White LEDs PR4401/4402 Requires Only One External Component The PR4401 and PR4402 are single cell step-up converters for white LEDs operating from a supply voltage of less than 0.9V. Only one external inductor is needed for operation of a white LED. PR4401 is recommended for mean LED currents of up to 20mA, PR4402 for up to 40mA. This makes PR4401 and PR4402 ideal for use in low-cost or small-sized applications such as LED flashlights or LCD b.

PR4402 Features

* minimum startup voltage 0.9V 200/250mA peak output current only one external component required battery deep discharge protection Applications

* Small-sized LED torches

* LCD backlighting

* LED indicator lights Typical Application Vba

PR4401_PREMA.pdf