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Diodes Semiconductor Electronic Components Datasheet

AP3607 Datasheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK

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AP3607 pdf
Data Sheet
4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER
AP3606/AP3607
General Description
The AP3606 and AP3607 are step-up DC-DC
converters based on 1x/1.5x charge pump and low
dropout current sink, which helps them maintain the
highest efficiency. The AP3606 is specially designed
to drive up to 4 WLEDs in backlight display while
the AP3607 is designed for 6 WLEDs.
These devices provide up to 20mA current for each
WLED. There are totally 16 steps of current control,
which is achieved through a digital pulse dimming
function on EN pin. Additionally, 1MHz high
switching frequency enables the use of small external
capacitors. Internal soft-start circuitry prevents
excessive inrush current during start-up and mode
transition.
The supply voltage ranges of AP3606 and AP3607
are from 2.7V to 5.5V which make them ideally suit
for applications powered by Li-ion battery.
These ICs are available in the tiny package of
QFN-3×3-16.
Features
• Regulated Output Current with ±3% Matching
• Drives up to 4 WLEDs at 20mA Each (AP3606)
Drives up to 6 WLEDs at 20mA Each (AP3607)
• 16 Steps Brightness Control Using Pulse Signal
Dimming
• Wide Operating Voltage Range: 2.7V to 5.5V
• High Operating Frequency: 1MHz
• Auto 1x/1.5x Charge Pump Mode Selection
• Built-in Soft-start
• Output Over Voltage Protection
• Built-in UVLO
• Built-in OTSD
• Operating Temperature Range: -40°C to 85°C
Applications
Mobile Phone
• PDA
• MP3/4
QFN-3×3-16
Figure 1. Package Type of AP3606/AP3607
Jan. 2013 Rev. 1. 5
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP3607 Datasheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK

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AP3607 pdf
4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER
Pin Configuration
FN Package
(QFN-3×3-16)
Data Sheet
AP3606/AP3607
Pin 1 Mark
C1- 1
C2- 2
C2+ 3
C1+ 4
16 15 14 13
EP
56 78
12 D2
11 D3
10 D4
9 NC
Exposed PAD,
Connected to AGND
Pin 1 Mark
C1- 1
C2- 2
C2+ 3
C1+ 4
16 15 14 13
EP
56 78
12 D3
11 D4
10 D5
9 D6
Exposed PAD,
Connected to AGND
Note: Pin 14 should be connected with Pin 16 on PCB Board.
Note: Pin 15 should be connected with Pin 16 on PCB Board.
AP3606
AP3607
Figure 2. Pin Configuration of AP3606/AP3607 (Top View)
Pin Description
Pin Number
AP3606 AP3607
11
22
33
44
Pin Name
C1-
C2-
C2+
C1+
Function
Flying capacitor 1 negative terminal. The flying capacitor should be connected as
close to this pin as possible
Flying capacitor 2 negative terminal. The flying capacitor should be connected as
close to this pin as possible
Flying capacitor 2 positive terminal. The flying capacitor should be connected as
close to this pin as possible
Flying capacitor 1 positive terminal. The flying capacitor should be connected as
close to this pin as possible
5 5 AGND Analog ground
6 6 PGND Power ground
7 7 VIN Supply voltage input
8
8
EN
Enable control input. Logic high enables the IC; while logic low forces the IC into
shutdown mode. It is used for digital dimming by applying a pulse signal on it.
9, 15
NC No connection (AP3606 only)
9, 10
D6 , D5
10, 11, 12, 11, 12, 13,
13 14
D4 ~ D1
14 15 VOUT2
16 16 VOUT1
Current sink for WLED6 and WLED5. Connect the cathode of WLEDs to these
pins. If not used, these pins must be connected with VIN (AP3607 only)
Current sink for WLED4, 3, 2, 1. Connect the cathode of WLEDs to these pins. If
not used, these pins must be connected with VIN
Output pin 2. It powers 4 channels current sink (AP3606) and 6 channels current
sink (AP3607)
Output Pin 1. It’s the charge pump output. The output capacitor should be placed
closely to this pin
Jan. 2013 Rev. 1. 5
BCD Semiconductor Manufacturing Limited
2


Part Number AP3607
Description 4/6 CHANNEL CHARGE PUMP CURRENT SINK
Maker BCD Semiconductor
Total Page 18 Pages
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