Diodes AP3608E - Manual

EIGHT-CHANNEL CONSTANT CURRENT SINK WITH CURRENT MATCH AP3608E
Data Sheet
1
Mar. 2011 Rev. 1. 5 BCD Semiconductor Manufacturing Limited
General Description
The AP3608E is an eight-channel constant current sink
with current match used for LED driver. It uses an
external resistor to set the current for eight LED strings
with an accuracy of
±1.5%. The full scale LED current
can be adjusted from 10mA to 100mA for each chan-
nel. The LED light can be adjusted by PWM dimming
function.
The device can keep working when LED opens with-
out damage. It features under voltage lockout protec-
tion and over temperature protection.
The AP3608E has four interface terminals (FB, SDB,
FBX and SDBX pins). The first two terminals allow
the device to work with a DC/DC converter to drive
LED arrays for good performance. And the other two
enable the device to be connected in parallel.
The AP3608E is available in QFN-4 × 4-24, TSSOP-
20(EDP) and SOIC-20 packages.
Features
· Input Voltage Range: 4.2V to 5.5V
· Typical Output Current: 480mA (60mA/1V per
Channel)
· Maximum Output Current: 800mA (100mA/1.5V
per Channel)
· Current Match Accuracy: ±1.5%
· PWM Dimming Control
· Open LED Self-check and Protection
· Under Voltage Lockout Protection
· Over Temperature Protection
· FBX and SDBX Pins Enable Parallel Application
Applications
· Notebook
· LCD Display Modules
· LCD Monitor
· LCD TV
Figure 1. Package Types of AP3608E
QFN-4 × 4-24 TSSOP-20(EDP) SOIC-20