Datasheet Details
| Part number | HT7939A |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 2.47 MB |
| Description | High Current and Performance White LED Driver |
| Download |
HT7939A Download (PDF)
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| Part number | HT7939A |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 2.47 MB |
| Description | High Current and Performance White LED Driver |
| Download |
HT7939A Download (PDF)
|
|
|
|
The HT7939A is a high efficiency boost converter for driving multiple White LEDs using current mode operation.
The device is designed to drive up to 39 White LEDs from a 5V power supply.
The White LED current is setup using an external current setting resistor, which has a low feedback voltage of 0.2V to minimise resistor power losses and thus improving efficiency.
HT7939A High Current and Performance White LED Driver Feature • Input voltage range: 2.6V~5.5V • High efficiency - up to 90% • Integrated N-ch MOSFET • Can drive up to 39 WLEDs from a 5V input • Low standby current: 0.1mA (typ.) • Built-in OVP, OCP, OTP, UVLO protection • EN pin dimming frequency up to 200kHz • 1.
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