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, ;

High Current and Performance White LED Driver

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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\;

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 ;

High Current and Performance White LED Driver

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Performance White LED Driver

文件：2.06458 Mbytes Page：13 Pages

High Current and Performance White LED Driver

文件：2.0825 Mbytes Page：13 Pages

High Current and Performance White LED Driver

文件：1.73377 Mbytes Page：12 Pages

8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer

GENERAL DESCRIPTION The AD7938/AD7939 are 12-bit and 10-bit,high speed,low power,successive approximation (SAR) ADCs. The parts operate from a single 2.7 V to5.25 V power supply and feature throughput rates up to1.5 MSPS.The parts contain a low noise, wideband width,differential track-and-hold

8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer

GENERAL DESCRIPTION The AD7938/AD7939 are 12-bit and 10-bit,high speed,low power,successive approximation (SAR) ADCs. The parts operate from a single 2.7 V to5.25 V power supply and feature throughput rates up to1.5 MSPS.The parts contain a low noise, wideband width,differential track-and-hold

Electronic Channel Select System Control Circuit for TV/VCR Use

Electronic Channel Select System Control Circuit for TV/VCR Use

a-Si Contact Type Image Sensor-Use Driver

Features • High-speed silcion gate CMOS device • On-chip high-speed shiftable (5MHz max.) 64-bit bidirectional shift register, 64-bit sensor driver analog switch • On-chip CTL signal (CTL) to turn OFF 64-bit sensor driver analog switch • On-chip noise cancel analog switch

Laser Diode Driver with Automatic Power Control

General Description The VSC7938 is a single 3.3V or 5V supply laser diode driver specially designed for SDH/SONET applications up to 3.125Gb/s. External resistors set a wide range of bias and modulation currents for driving the laser. Features • Power Supply: 3.3V or 5V ±5 • AC-Coupled to