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Battery life extension by automatic charge pump switch between ×1 and ×1.5 according to the detection of the LED drive current |
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Controlling 1 to 6 lights of white LED connected in parallel |
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Set up LED drive current value by external resistor
(5kΩ:5mA/ch, 15kΩ:15mA/ch, 20kΩ:20mA/ch) |
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Dividing 6-channel to 2-groups by setting up SEL1/SEL2 pins
(L/L = 6:0ch, L/H = 5:1ch, H/L = 4:2ch, H/H = 3:3ch) |
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2-wire input controlling (1-wire input controlling when SEL1/SEL2 pins are set to "Low") |
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ON/OFF and brightness control by input signal controlling of EN1/EN2 pins |
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Supply voltage range
No-load current (IOUT = 0mA): 2.7 to 4.6V
Load current (IOUT = 120mA): 3.3 to 4.6V |
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Maximum output voltage: 4.2V (typ) |
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Maximum output current: 120mA (typ) |
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Quiescent current
Not-switching (×1 mode): 0.7mA (typ)
Switching (×1.5 mode): 2.0mA (typ) |
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Standby current (Power save mode): 0.01µA (typ) |
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Operating frequency (×1.5 mode): 750kHz (typ) |
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LED drive current accuracy (RSET = 20kΩ): 20mA ±3% |
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Input signal frequency for dimming (Duty = 50%): 150kHz (max) |
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Package: QFN-20-040040-1 |
Datasheet(PDF 213KB)
