PREMA PR4402
The PR4401 and PR4402* are single cell step-up converters for white LEDs operating from a supply voltage of less than 0.9V. 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. | PR4402 |
|---|---|
| Datasheet | PR4402 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...
