PR4401 – (PR4401 / PR4402) 0.9V Boost Driver

PR4401 Datasheet PDF learn more.

Part number : PR4401

Functions : This is a kind of semiconductor, (PR4401 / PR4402) 0.9V Boost Driver.

Pin arrangement :

Package information :

Manufacturer : PREMA

Image :

PR4401 Datasheet PDF

The texts in the PDF file :

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 backlighting for portable devices.

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 Vbat =1.2V or 1.5V L1 The inductance L1 determines the LED current: Inductance L1 Mean current 6.5 mA 8.3 mA 10.8 mA 11 mA 14 mA 22 mA 32 mA * 40 mA * for PR4401 PR4401 PR4401 PR4401 PR4401 PR4401/4402 PR4402 PR4402 47µH Vcc Vout Gnd PR4401/02 White LED 32µH 26.7µH 22 µH 14.7 µH 10 µH 6.8 µH * 4.7 µH * For output currents higher than 20mA an additional blocking capacitor at Vcc is recommended. * PR4402 only measured with inductor Murata type LQH32C series 10-22µH: one white LED 4.7-6.8µH: two white LEDs in parallel Pin

Description

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 Rev 0908 Free Datasheet http:/// LED DRIVER PR4401/PR4402 Absolute Maximum Ratings (PR4401 and PR4402) Parameter VCC (no damage) Operating Temperature Range Storage Temperature Range Electrostatic Discharge (ESD) Protection Min -0.3 -20 -55 2 Typ Max 8 85 150 Units V °C °C kV Electrical Characteristics Parameter Supply Volta [ … ]

PR4401 PDF File



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