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裕鼎祥科技让电源设计更便捷可靠|联系电话：13928434054 |
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裕鼎祥科技让电源设计更便捷可靠|联系电话：13928434054 |
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General Description
The TP3919 is a 1.2MHz PWM boost switching regulator designed for constant-current white LED driver applications. The TP3919 can drive a string of up to 8 white LEDs from a 3.3V in series, ensuring uniform brightness and eliminating several ballast resistors. The TP3919 implements a constant frequency 1.2MHz PWM control scheme.The high frequency PWM operational so saves board space by reducing external component sizes.To improve efficiency, the feedback voltage is set to 200mV, which reduces the power dissipation in the current setting resistor.
Highly integration and internal compensation network minimizes as 3 external component counts. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency.
Features
* Built-in Schottky Diode
* High Efficiency: 86%
* 1.2MHz Fixed-Frequency PWM Operation
* Maximum Output Voltage up to 28V
* Operating Range : 2.7V to 16V
* Shutdown Supply Current:<1uA .
* Available in SOT23-6 Package .
* Built-in Over Voltage Protec. tion
* Minimize the External Component
* RoHS Compliant and 100% Lead (Pb)-Free
Applications
* WLED Backlight driver
* OLED Backlight driver
* PDA / DSC
* Camera Flash WLED driver
