AK7864 Datasheet, PDF (1/12 Pages) Asahi Kasei Microsystems – 3 channel LED driver with Charge Pump

[AK7864]
AK7864
3 channel LED driver with Charge Pump
Device Outline
This product is include the charge pump power supply and include the 3 channel LED driver who
drives the LED of the anode common in the constant current . The current to pass for each channel
can be adjusted by the external resistance and the register setting. Also, it has the control pins which
turn on or off the current. It is the best for the LED drive for the CIS sensor.
Features
■ Operation Voltage
■ Operating Temperature Range
■ LED driver current
■ Current Accuracy
■ LED Current rise / fall time
■ Charge Pump pressor circuit
■ Package
■ Power
■ Application
3.3V±5%
0 ~ 70℃
RED: 66mA (Adjustment external resister:22 ~ 66mA)
GREEN: 66mA (Same as above, each channel is spec in
absolute value.)
BLUE: 66mA (Same as above, each channel is spec in
absolute value.)
Usable Vf MAX range of the LED is 4.8V. The resistance for
the current regulation is usable in 1/16W -type.
▪ 50% setting is an upper bound when 3ch becoming
turning on at the same time.
▪ 3ch independent ON/OFF.
▪ Current setting in eight steps
When the external resistance value becomes the
assumption outside, it has the protection circuit which
doesn't make the electric current which flows through the
LED equal to or more than 150mA（-30%～+45%）
±9.1%（by ideal resistance）
10μs (typ.) (10% ~ 90%)
Generate the necessary voltage for the LED （Vf max 4.8V）
16pinQFN 3mm, 0.75mm thickness with radiation TAB in
Solderside
VDD 3.135 ~ 3.465V
A light source driver for CIS module of MFP
MS1152 - E - 01
1
2010/09