Diodes AP3606, AP3607 User Manual

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Data Sheet

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

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Data Sheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Pin Configuration

FN Package

(QFN-3×3-16)

Pin 1 Mar k

VOUT1

C1-

1

-

C

2

2

C2+

3

49

C1+

5678

NC

EP

VOUT2

D1

13141516

12

D2

11

D3

10

D4
NC

EN

AGND

Note: Pin 14 should be connected with Pin 16 on PCB Board.

VIN

PGND

AP3606 AP3607

Figure 2. Pin Configuration of AP3606/AP3607 (Top View)

Exposed PAD,
Connected to AGND

Pin 1 Ma rk

C1-

-

C

2
C2+
C1+

Note: Pin 15 should be connected with Pin 16 on PCB Board.

VOUT1

VOUT2

D1

1

2

3

49

EP

5678

AGND

D2

13141516

12

D3

11

D4

10

D5
D6

Exposed PAD,
Connected to AGND

EN

VIN

PGND

Pin Description

Pin Number

AP3606 AP3607

1 1 C1-

2 2 C2-

3 3 C2+

4 4 C1+

5 5 AGND Analog ground

6 6 PGND Power ground

7 7 VIN Supply voltage input

8 8 EN

9, 15

9, 10 D6 , D5

10, 11, 12,

Jan. 2013 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

11, 12, 13,

13

14

14 15 VOUT2

16 16 VOUT1

Pin Name 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

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.

NC No connection (AP3606 only)

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)

D4 ~ D1

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

2

Data Sheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Functional Block Diagram

C1- C1+ C2- C2+

VIN

EN

7

8

14 32

1x/1.5x Charge Pump

1MHz

OSC

Shutdown

Delay

16 Steps Pulse

Dimming Controller

Current Limitation

Soft Start

UVLO

4 Channels Current Sink

AP3606

OVP

OTSD

2D1 D3 D4

D

16

VOUT1

5

AGND

6

PGND

14

VOUT2

10111213

VIN

EN

7

8

1MHz

OSC

Shutdown

Delay

16 Steps Pulse

Dimming Controller

Figure 3. Functional Block Diagram of AP3606/AP3607

C1+

C1-

1

1x /1.5x Charge Pump

C2- C2+

Soft Start

UVLO

2

OTSD

4

Current Limitation

6 Channels Current Sink

D2 D3 D4 D5 D6

D1

AP3607

3

16

VOUT1

5

AGND

OVP

11121314

6

PGND

15

VOUT2

910

Jan. 2013 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

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Data Sheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Ordering Information

AP36XX -

Circuit Type G1: Green

06: AP3606
07: AP3607

Package

FN: QFN-3×3-16

Package

QFN-3×3-16

Temperature

Range

-40 to 85°C

Part Number Marking ID

AP3606FNTR-G1 B1B

AP3607FNTR-G1 B1C

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.

TR: Tape and Reel

Packing

Type

Tape & Reel

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Input Voltage VIN -0.3 to 6 V

VOUT Pin Voltage (VOUT1 & VOUT2) V

EN Pin Voltage VEN -0.3 to 6 V

C1+, C2+ Pin Voltage VC+ -0.3 to 6 V

C1-, C2- Pin Voltage VC- -6 to 0.3 V

D1, D2, D3, D4 Pin Voltage AP3606

D1, D2, D3, D4, D5, D6 Pin Voltage AP3607

Thermal Resistance
(Junction to Ambient, No Heat Sink, Free Air)

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10sec)

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.

-6 to 0.3 V

OUT

V

V

D

θJA

T

J

T

STG

T

LEAD

to VIN V

OUT

60 ºC/W

150 ºC

-65 to 150 ºC

260 ºC

Jan. 2013 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

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Data Sheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage VIN 2.7 5.5 V

Operating Ambient Temperature TA -40 85 ºC

Electrical Characteristics

=3.6V, VEN=VIN, TA=25ºC, CIN=C1=C2=C

V

IN

=1μF, VF(forward voltage)=3.2V, unless otherwise noted.

OUT

Parameter Symbol Conditions Min Typ Max Unit

Input Section

Input Voltage VIN ID=0mA to 80mA 2.7 5.5 V

Under Voltage Lockout Threshold VIN Falling 2.2 V

Under Voltage Lockout Hysteresis 250 mV

Supply Current ICC No Load 1.7 3 mA

Shutdown Supply Current I

Charge Pump Section

Switch Frequency f

1x Mode to 1.5x Mode Transition
Voltage (V

1.5x Mode to 1x Mode Transition
Voltage (V

Current Source Section

Falling)

IN

Rising)

IN

VEN=GND 3 10

SHDN

VIN=3.0V, 1.5x Mode 0.7 1 1.3 MHz

OSC

=3.2V,

V

D

I

D1=ID2=ID3=ID4

=3.2V,

V

D

I

D1=ID2=ID3=ID4

=20mA

I

D5=ID6

V

=3.2V,

D

I

D1=ID2=ID3=ID4

=3.2V,

V

D

I

D1=ID2=ID3=ID4

=20mA

I

D5=ID6

=20mA

3.5 3.6 V

=

=20mA

3.7 3.8 V

=

V

V1X

1.5X

AP3606

AP3607

AP3606

AP3607

μA

100% Setting,

WLED Current ID

3.0V≤VIN≤5.0V
=-40ºC to 85ºC

T

A

18.5 20 21.5 mA

Jan. 2013 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

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Data Sheet

4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3606/AP3607

Electrical Characteristics (Continued)

=3.6V, VEN=VIN, TA=25ºC, CIN=C1=C2=C

V

IN

Parameter Symbol Conditions Min Typ Max Unit

Current Matching Between any
Two Outputs

Current Matching Between any
Two Outputs

I

D-Match1

I

D-Match2

=1μF, VF(forward voltage)=3.2V, unless otherwise noted.

OUT

AP3606

AP3607

AP3606

AP3607

V

D1=VD2=VD3=VD4

3.2V

V

D1=VD2=VD3=VD4

VD5=VD6=3.2V

V

D1=VD2=VD3=VD4

V to 4.0V
VIN=3.2V to 5.0V

V

D1=VD2=VD3=VD4

VD5=VD6=3.0V to 4.0V

=

=

=3.0

=

-3 3 %

-3.5 3.5 %

VIN=3.2V to 5.0V

Enable Section

EN High Level Threshold Voltage VIH 1.5 V

EN Low Level Threshold Voltage VIL 0.5 V

EN Input Current IEN VEN= 0V to 5V 1 10

EN Low to Shutdown Delay t

EN Low Time for Dimming tLO

EN High Time for Dimming tHI

1 ms

SHDN

0.45 500

0.45

μA

μs

μs

Total Device

Soft-start Time tSS

AP3606 I

=80mA Total

D

200

μs

AP3607 ID=120mA Total

=3.2V,

V

Inrush Current I

Over Voltage Protection V

Thermal Shutdown T

AP3606

INRUSH

AP3607

Note 2 5.5 V

OVP

160 ºC

OTSD

IN

I

=80mA Total

D

=3.2V,

V

IN

=120mA Total

I

D

200

mA

320

Thermal Shutdown Hysteresis T

Thermal Resistance
(Junction to Case)

20 ºC

HYS

θ

QFN-3×3-16 15 ºC/W

JC

Note 2: Open circuit at any WLED that is programmed to be in the on state.

Jan. 2013 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

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