High Current and Performance White LED Driver

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High Current and Performance White LED Driver

?\n\n HT7938 is high efficiency boost converter with constant current output to provide backlight in handheld devices. Series connection of LEDs provides constant identical LED currents resulting in uniform brightness. The continuous LED current is set with FB pin regulated voltage across an e ? Efficiency up to 85% at VIN=3.6V, 9LEDs, ILED=20mA\n? 1.2MHz fixed switching frequency\n? Low Standby Current: 0.1μA (typ.) at VEN= 0V?\n? Matches LED current\n? Tiny inductor and capacitors\n? Up to 10 strings White-LED (LED VF(Max.)=3.5V)\n? Tiny 6-lead SOT23-6 package\n? Built in OVP, OCP, ;

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High Current and Performance White LED Driver

文件：914.71 Kbytes 頁數(shù)：11 Pages

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Performance White LED Driver

文件：2.06458 Mbytes 頁數(shù)：13 Pages

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High Current and Performance White LED Driver

文件：2.0825 Mbytes 頁數(shù)：13 Pages

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High Current and Performance White LED Driver

文件：1.73377 Mbytes 頁數(shù)：12 Pages

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High Current and Performance White LED Driver

The HT7938A is high efficiency boost converter with constant current output for backlight applications in handheld devices. Using a series connection of LEDs provides constant identical LED currents resulting in uniform brightness. The continuous LED current is set using the device FB pin regulated Efficiency up to 90% at VIN=4.0V, 5S2P, ILED=20mA\n1.2MHz fixed switching frequency\nLow standby current: 0.1μA (typ.) at VEN=0V\nMatches LED current\nTiny inductor and capacitors\nEN pin dimming frequency up to 200kHz\nUp to 10 strings White-LED (LED VF(Max.)=3.5V)\nTiny 6-lead SOT23-6 package\;

Holtek

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High Current and Performance White LED Driver

The HT7938A is high efficiency boost converter with constant current output for backlight applications in handheld devices. Using a series connection of LEDs provides constant identical LED currents resulting in uniform brightness. The continuous LED current is set using the device FB pin regulated ? Efficiency up to 90% at VIN=4.0V, 5S2P, ILED=20mA\n? 1.2MHz fixed switching frequency\n? Low standby current: 0.1μA (typ.) at VEN=0V\n? Matches LED current\n? Tiny inductor and capacitors\n? EN pin dimming frequency up to 200kHz\n? Up to 10 strings White-LED (LED VF(Max.)=3.5V)\n? Tiny 6-lead ;

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