AP3605FNTR-E1

AP3605FNTR-E1 Datasheet

4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605

Part	Datasheet
AP3605FNTR-E1	AP3605FNTR-E1 (pdf)

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Data Sheet 4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605 The AP3605 is a step-up DC/DC converter based on 1.5x charge pump current source, it is specially designed for LED supplies in backlight display. The AP3605 can provide constant current up to 20mA for each LED, which is programmed by an external resistor, so it has a total capability to provide 80mA for 4 LEDs. The chip has a good performance of LED current matching and allows PWM brightness dimming control. Additionally, high switching frequency up to 1MHz enables the use of two small external flying capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up. The AP3605 supply voltage range is from 2.7V to 5.5V, ideally suited for applications powered by the Liion battery. • Regulated Output Current with ±3% Matching • Regulated ±10% Output Current Source • Drive up to 4 LEDs at 20mA Each • Wide Operating Voltage Range 2.7V to 5.5V • High Efficiency up to 93% • High Operating Frequency 1MHz • Built-in Soft-Start to Limit the Inrush Current • LED Brightness Control through PWM and Ana- log Signal • PWM Dimming Frequency up to 50kHz • Built-in Standby Mode to Get PWM Dimming Duty Cycle Control Linearity • Built-in OTSD Over Temperature Shutdown Function to Protect the Device from Burn Out The AP3605 is available in a 3mmx3mm QFN-3x3-16 tiny package. Its operating temperature range is -40oC to 85oC. • • • Mobile Phone MP3, MP4 White LED Backlight in Mobile Phone, PDA QFN-3x3-16 Figure Package Type of AP3605 BCD Semiconductor Manufacturing Limited 1 Data Sheet 4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605 Pin Configuration FN Package QFN-3x3-16 Pin 1 Mark D3 D2 D1 VIN2 16 15 14 13 12 EN VOUT1 2 PGND 3 C2- 4 11 ISET 10 AGND 9 C1+ 5678 VIN1 C1- C2+ VOUT2 Exposed PAD, Connected to AGND Note Pin 2 should be connected with Pin 8 and Pin 5 should be connected with Pin 13 on PCB board. Pin Description Figure Pin Configuration of AP3605 Top View Pin Number 1, 16, 15, 14 2, 8 3 4 5, 13 6 7 9 10 11 Pin Name Function D4 to D1 Current Source Output. Connect the anode of the white LEDs to these outputs VOUT1, VOUT2 Output Pin 1 and 2, must be connected together. The output capacitor should be placed closely to these pins PGND Power Ground. Connect this pin with power ground plane C2VIN1, VIN2 C1C2+ C1+ AGND ISET Flying Capacitor 2 Negative Terminal. The flying capacitor 2 should be connected as close to this pin as possible Supply Voltage Input 1 and 2, must be connected together Flying Capacitor 1 Negative Terminal. The flying capacitor 1 should be connected as close to this pin as possible Ordering Information AP3605 Circuit Type Package FN QFN-3x3-16 E1 RoHS TR Tape and Reel Package QFN-3x3-16 Temperature Range Marking ID -40 to 85oC AP3605FNTR-E1 Note 1 F1A Note 1 AP3605FNTR-E1 is a green product. Packing Type Tape & Reel BCD Semiconductor Manufacturing Limited 3 Data Sheet 4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605 Absolute Maximum Ratings Note 2 Parameter Input Voltage EN Pin Voltage VOUT1 Pin Voltage VOUT2 Pin Voltage ISET Pin Voltage Output Current at VOUT2 Pin Thermal Resistance Junction to Ambient, no Heat sink Operating Junction Temperature Storage Temperature Range Lead Temperature Soldering, 10sec ESD Human Body Model Symbol VIN VEN VOUT1 VOUT2 VISET IOUT2 TJ TSTG TLEAD Value to 6 to 6 to 6 to 6 to 6 150 60 150 -65 to 150 260 2000 Unit V mA oC/W oC V Note 2 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. Recommended Operating Conditions Parameter Input Voltage Symbol VIN Operating Temperature Current Source Set Resistor RISET Unit BCD Semiconductor Manufacturing Limited 4 Data Sheet 4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605 Electrical Characteristics VIN=3.5V, VEN=VIN, RISET=1.8kΩ, CFLY1=CFLY2=CIN=COUT=1uF, TA=25oC, VD1=VD2=VD3=VD4=3.4V, unless otherwise specified. Parameter Input Section Input Voltage Supply Current Shutdown Supply Current Charge Pump Section Switching Frequency Efficiency Conditions VIN ICC ISHDN ID=0 to 40 mA No Load, ISET floating VEN=GND

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Data Sheet
4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605

The AP3605 is a step-up DC/DC converter based on 1.5x charge pump current source, it is specially designed for LED supplies in backlight display.

The AP3605 can provide constant current up to 20mA for each LED, which is programmed by an external resistor, so it has a total capability to provide 80mA for 4 LEDs. The chip has a good performance of LED current matching and allows PWM brightness dimming control. Additionally, high switching frequency up to 1MHz enables the use of two small external flying capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up.

The AP3605 supply voltage range is from 2.7V to 5.5V, ideally suited for applications powered by the Liion battery.
• Regulated Output Current with ±3% Matching
• Regulated ±10% Output Current Source
• Drive up to 4 LEDs at 20mA Each
• Wide Operating Voltage Range 2.7V to 5.5V
• High Efficiency up to 93%
• High Operating Frequency 1MHz
• Built-in Soft-Start to Limit the Inrush Current
• LED Brightness Control through PWM and Ana-
log Signal
• PWM Dimming Frequency up to 50kHz
• Built-in Standby Mode to Get PWM Dimming

Duty Cycle Control Linearity
• Built-in OTSD Over Temperature Shutdown

Function to Protect the Device from Burn Out

The AP3605 is available in a 3mmx3mm QFN-3x3-16 tiny package. Its operating temperature range is -40oC to 85oC.
•
•
•

Mobile Phone MP3, MP4 White LED Backlight in Mobile Phone, PDA

QFN-3x3-16 Figure Package Type of AP3605

BCD Semiconductor Manufacturing Limited 1

Data Sheet
4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605

Pin Configuration

FN Package QFN-3x3-16

Pin 1 Mark D3 D2 D1 VIN2
16 15 14 13
12 EN

VOUT1 2 PGND 3

C2- 4
11 ISET 10 AGND 9 C1+
5678 VIN1 C1- C2+ VOUT2

Exposed PAD, Connected to AGND

Note Pin 2 should be connected with Pin 8 and Pin 5 should be connected with Pin 13 on PCB board.

Pin Description

Figure Pin Configuration of AP3605 Top View

Pin Number 1, 16, 15, 14
2, 8 3 4 5, 13 6 7 9 10 11

Pin Name

Function

D4 to D1 Current Source Output. Connect the anode of the white LEDs to these outputs

VOUT1, VOUT2 Output Pin 1 and 2, must be connected together. The output capacitor should be placed closely to these pins

PGND Power Ground. Connect this pin with power ground plane

C2VIN1, VIN2

C1C2+ C1+ AGND ISET

Flying Capacitor 2 Negative Terminal. The flying capacitor 2 should be connected as close to this pin as possible

Supply Voltage Input 1 and 2, must be connected together

Flying Capacitor 1 Negative Terminal. The flying capacitor 1 should be connected as close to this pin as possible
Ordering Information

AP3605

Circuit Type

Package FN QFN-3x3-16

E1 RoHS TR Tape and Reel

Package QFN-3x3-16

Temperature Range

Marking ID
-40 to 85oC

AP3605FNTR-E1 Note 1 F1A

Note 1 AP3605FNTR-E1 is a green product.

Packing Type Tape & Reel

BCD Semiconductor Manufacturing Limited 3

Data Sheet
4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605

Absolute Maximum Ratings Note 2

Parameter Input Voltage EN Pin Voltage VOUT1 Pin Voltage VOUT2 Pin Voltage ISET Pin Voltage Output Current at VOUT2 Pin Thermal Resistance Junction to Ambient, no Heat sink Operating Junction Temperature Storage Temperature Range Lead Temperature Soldering, 10sec ESD Human Body Model

Symbol VIN VEN

VOUT1 VOUT2 VISET IOUT2

TJ TSTG TLEAD

Value to 6 to 6 to 6 to 6 to 6
150 60 150 -65 to 150 260 2000

Unit V mA
oC/W oC V

Note 2 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.

Recommended Operating Conditions

Parameter Input Voltage

Symbol VIN

Operating Temperature

Current Source Set Resistor

RISET

Unit

BCD Semiconductor Manufacturing Limited 4

Data Sheet
4-Channel Charge Pump LED Driver with Current Balancing and Wide Range PWM Dimming AP3605

Electrical Characteristics

VIN=3.5V, VEN=VIN, RISET=1.8kΩ, CFLY1=CFLY2=CIN=COUT=1uF, TA=25oC, VD1=VD2=VD3=VD4=3.4V, unless otherwise specified.

Parameter Input Section Input Voltage Supply Current Shutdown Supply Current Charge Pump Section Switching Frequency Efficiency

Conditions

VIN ICC ISHDN

ID=0 to 40 mA No Load, ISET floating VEN=GND

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Datasheet ID: AP3605FNTR-E1 509848