PT6905- 3-Stages Dimming LED Driver-Princeton Technology (Shenzhen) Corp._

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PT6905- 3-Stages Dimming LED Driver

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Warranty(Year)：1 Year

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Product Description

The PT6905 is a continuous mode inductive step-down converter with three-stages dimming, designed for driving single or multiple series white LEDs efficiently from a voltage source higher than the output LED
voltage. The IC operates from an input supply between 6V and 36V and provides three-stages dimming with output current of up to 1.2Amp.

The PT6905 includes the internal switch and a high-side output current sensing circuit, which uses an external resister to set the average output current.

The PT6905 has a three-stages dimming function. That is to say the output current will be adjusted to 100% when the first time power on corresponding to stage-one, 30% when the second time power on corresponding to stage-two and 10% when the third time power on
corresponding to stage-three. The cycle will restart to stage-one again when the fourth time power on. So this cycle will go on if the power off time is no less than six seconds according to the external capacitor Cs of 10uF. And the power could be saved if less light needed.

FEATURES
- High Efficiency (up to 95%)
- Maximum 1.2A Output Current
- Wide Input Voltage: 6V ~ 36V
- Three-Stages Dimming
- Typical 5% Output Current Accuracy
- Thermal Shutdown 150℃ Typical
- SOT-89-5L Package