Diodes AP3605 - Manual (Page 2)

2
Jan. 2013 Rev. 1. 8 BCD Semiconductor Manufacturing Limited
4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605
Data Sheet
Pin Description
Pin Number Pin Name Function
1, 16, 15, 14 D4 to D1 Current Source Output. Connect the anode of the white LEDs to these outputs
2, 8 V
OUT1,
V
OUT2
Output Pin 1 and 2, must be connected together. The output capacitor should be placed
closely to these pins
3 PGND Power Ground. Connect this pin with power ground plane
4 C2-
Flying Capacitor 2 Negative Terminal. The flying capacitor 2 should be connected as close
to this pin as possible
5, 13 V
IN1,
V
IN2
Supply Voltage Input 1 and 2, must be connected together
6 C1-
Flying Capacitor 1 Negative Terminal. The flying capacitor 1 should be connected as close
to this pin as possible
7 C2+
Flying Capacitor 2 Positive Terminal. The flying capacitor 2 should be connected as close to
this pin as possible
9 C1+
Flying Capacitor 1 Positive Terminal. The flying capacitor 1 should be connected as close to
this pin as possible
10 AGND
Analog Ground. Connect this pin with control signal ground plane. PGND, AGND and the
exposed PAD should be connected together
11 ISET
Current Source Set Pin. Connect a resistor between this pin and GND to set the maximum
LED current
12 EN
Enable Control Input. Logic high enables the IC; while logic low forces the device into shut-
down mode to reduce the supply current to less than 1
μA. Add a PWM signal to this pin to
achieve brightness control
Figure 2. Pin Configuration of AP3605 (Top View)
Pin Configuration
(QFN-3x3-16)
FN Package
Note: Pin 2 should be connected with Pin 8 and Pin 5 should be connected with Pin 13 on PCB board.
Exposed PAD, Connected to AGND
E P
5 6 7 8
1
2
3
4 9
12
Pin 1 Mark
11
10
13 14 15 16
PGND
C1+
V
IN1
C1-
V
OUT1
C2+
C2-
AGND
D1 D2
D4
D3
ISET
EN
V
IN2
V
OUT2