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Diodes Semiconductor Electronic Components Datasheet

AP3609 Datasheet

EIGHT-CHANNEL CONSTANT CURRENT SINK

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AP3609 pdf
Preliminary Datasheet
EIGHT-CHANNEL CONSTANT CURRENT SINK WITH CURRENT MATCH
General Description
Features
AP3609
The AP3609 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 AP3609 has two interface terminals (FB and
FBX). They enable the device to be connected in paral-
lel.
The AP3609 is available in SOIC-16 package.
· 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
· Enable Parallel Application
Applications
· Notebook
· LCD Display Modules
· LCD Monitor
· LCD TV
May 2013 Rev. 2. 0
SOIC-16
Figure 1. Package Type of AP3609
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP3609 Datasheet

EIGHT-CHANNEL CONSTANT CURRENT SINK

No Preview Available !

AP3609 pdf
Preliminary Datasheet
EIGHT-CHANNEL CONSTANT CURRENT SINK WITH CURRENT MATCH
Pin Configuration
AP3609
M Package
(SOIC-16)
CH1 1
CH2 2
CH3 3
CH4 4
PGND 5
CH5 6
CH6 7
CH7 8
16 EN
15 VCC
14 AGND
13 FB
12 ISET
11 FBX
10 PWM
9 CH8
Figure 2. Pin Configuration of AP3609 (Top View)
Pin Description
Pin Number Pin Name
Function
1, 2, 3, 4, 6, 7, 8, 9 CH1 to CH8 White LED cathode connection pin. These pins should be connected to GND if not used
5 PGND Ground pin. It would be useful when connected with PGND and exposed pad
10
PWM
PWM dimming control pin. Adding a PWM signal to this pin to control LED dimming
(see Figure 10 for detail dimming control mode). If not used, connect it to the high level
11
FBX
This pin is an interface terminal. Connecting it with FB pin can achieve parallel applica-
tion. If not used, leave it unconnected
LED current set pin. An external resistor is connected to this pin to set the current of each
12
ISET
channel according to ICHANNEL=1.194*400/RISET
13
FB
Feedback pin. This pin is an interface terminal, which samples the voltage of each channel,
and outputs the lowest voltage of the string to DC/DC converter
14 AGND Ground pin. It would be useful when connected with PGND and exposed pad
15 VCC Input voltage pin
16 EN Enable pin. Logic high enables the IC and logic low disables the IC
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
2


Part Number AP3609
Description EIGHT-CHANNEL CONSTANT CURRENT SINK
Maker BCD Semiconductor
Total Page 13 Pages
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