Datasheet Details
| Part number | HT7938A |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 698.08 KB |
| Description | High Current and Performance White LED Driver |
| Download |
HT7938A Download (PDF)
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| Part number | HT7938A |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 698.08 KB |
| Description | High Current and Performance White LED Driver |
| Download |
HT7938A Download (PDF)
|
|
|
|
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 voltage across an external sense resistor, RFB, connected between this pin and ground.
HT7938A High Current and Performance White LED Driver Feature • Efficiency up to 90% at VIN=4.0V, 5S2P, ILED=20mA • 1.2MHz fixed switching frequency • Low standby current: 0.1mA (typ.) at VEN=0V • Matches LED current • Tiny inductor and capacitors • EN pin dimming frequency up to 200kHz • Up to 10 strings White-LED (LED VF(Max.)=3.
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|---|---|
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