PREMA PR4401
The PR4401 and PR4402* are single cell step-up converters for white LEDs operating from a supply voltage of less than 0.9V. 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.| Part No. | PR4401 |
|---|---|
| Datasheet | PR4401 Download |
| Manufacturer |  PREMA |
| Description | 0.9V Boost Driver |
| Buy | Stock & Price |
FEATURES
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● 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 FunctionDESCRIPTION
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 Pac...
