Taiwan Memory Technology T6309B
The T6309B is a step-up DC/DC converter that drives LED with a constant current. The device can driver up to 3 series LEDs from a single-cell Li-Ion battery. The T6309B features a minimum off-time current-limited PFM control scheme.| Part No. | T6309B |
|---|---|
| Datasheet | T6309B Download |
| Manufacturer |  Taiwan Memory Technology |
| Description | Micropower Step-up DC/DC Converter |
| Buy | Stock & Price |
FEATURES
● Matched LED Current with Overvoltage Protection● Drives LEDs in series
● Up to 85% Efficiency
● Low 400mV Feedback Reference, Optional 1.19V Feedback Reference
● Internal Current Limit 250mA
● Under Voltage Lock Out Circuits
● 0.1uA Low Shutdown Supply Current
● 6-pin SOT-23 Package
● ESD Human Body Mode Over 5KV GRNERAL
DESCRIPTION
Series connection of the LEDs provides constant LED current that results in uniform brightness. The LED current is set with an external sense resistor (Rs) and is regulated by the feedback pin (FB) that regulates the voltage across the sense resistor to 400mV (typ). The low 400mV feedback reference voltage reduces power loss and improves efficiency for LED driver applications. Optional 1.19V feedback reference is available for normal output voltage applications like LCD bias. Output overvoltage protection (OVP) is integrated to prevent damage in case of output open circuit condition (e.g. faulty LED). The OVP pin can monitor the output voltage and turn off the converter in the event of overvoltage condition.
