Aimtron Technology AT1313
High Efficiency Constant Current White-LED Driver
| Part No. | AT1313 |
|---|---|
| Datasheet | AT1313 Download |
| Manufacturer |  Aimtron Technology |
| Description | High Efficiency Constant Current White-LED Driver |
| Buy | Stock & Price |
DESCRIPTION
The AT1313 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.4 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor. The AT1313 is available in 6-pin SOT-26 packages Application● LED Module
● Compact Back Light Module
● Constant Current Source Block Diagram VIN LX ON/OFF Control Logic / PWM Dimming Control VREF + Control Logic FB 18V VBG + Overvoltage Protection CTL N VREF 0.2V VBG 1.23V Soft-Start EN OVP Current Limit 1.2A + - CTL GND Aimtron reserves the right without notice to change this circuitry and specifications.
