AP2071 datasheet(11/31 Pages) AKM

Part #	AP2071

Description	High Current (8A) white LEDs driver for Flash with I2C

PDF	31 Pages

Scroll/Zoom	100%

Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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11 / 31 page

[AP2071AEN]

MS1607-E-00

- 11 -

2014/03

■ Torching Sequence

A battery can drive LEDs which is connected to the LED1~4 pins through the VOUT pin. The LED current

(torching current) can be set in the range from 10mA to 140mA by a register setting. The AP2071AEN will be

in torch mode by setting TORCH bit to “1” after setting the EN pin to “H” if the CHARGE pin is “H” or

CHAR bit is “1”. LEDs can be driven when the VOUT voltage reaches the voltage which is set by VSET[2:0]

bits.

The stable VOUT voltage is determined by input voltage (VIN), VOUT setting voltage (VSET) and LED VF.

Formula (1): In the case of VSET > VF + 0.5V > VIN*1.07

VOUT = VF + 0.5V

Formula (2): In the case of VSET > VIN*1.07 > VF + 0.5V

VOUT = VIN *1.07

Formula (3): In the case of VF > VSET → LED cannot be driven.

Set appropriate VOUT voltage for LEDs in consideration of VF value of LED.

AP2071 Datasheet(PDF) 11 Page - Asahi Kasei Microsystems