And answered the white LED drive circuit diagram
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As with TPS61040 booster converter to drive the parallel LED. Figure in FB pin through &gnd connection between a 15 Ω external resistance R1, according to the feedback voltage (VFB = 1.233 V), TPS61040 can provide 80 mA LED the constant current. The design allows for use in output physical size smaller external devices (use ceramic capacitors instead of tantalum capacitors), this is due to the high frequency switch TPS61040 provide 1 MHz. PWM control tube feet used to control the brightness of the LED lights. And answered the white LED drive circuit diagram:
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