AAT3114ISN-20-T1 Advanced Analogic Technologies, Inc., AAT3114ISN-20-T1 Datasheet

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AAT3114ISN-20-T1

Manufacturer Part Number
AAT3114ISN-20-T1
Description
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer
Advanced Analogic Technologies, Inc.
Datasheet
1.AAT3114ISN-20-T1.pdf (15 pages)
General Description
The AAT3113 and AAT3114/14A are low noise, constant
frequency charge pump DC/DC converters that use frac-
tional (1.5X) conversion to increase efficiency in white
LED applications. The devices can be used to produce
current levels up to 20mA for each output from a 2.7V
to 5.5V input. A low external parts count (two 1µF flying
capacitors and two small bypass capacitors at V
OUT) makes these devices ideally suited for small, bat-
tery-powered applications.
AnalogicTech’s Simple Serial Control™ (S
face is used to enable, disable, and set the LED drive
current for 32-level logarithmic scale LED brightness
control. AAT3113 and AAT3114/14A devices have a ther-
mal management system for protection in the event of a
short-circuit condition on any of the output pins. Built-in
soft-start circuitry prevents excessive inrush current
during start-up. A high switching frequency enables the
use of small external capacitors. A low-current shutdown
feature disconnects the load from V
cent current to less than 1µA. The AAT3113 provides
four LED current source outputs, and the AAT3114/14A
provides six. The AAT3113 is available in a Pb-free
12-pin TSOPJW package, and the AAT3114/14A is avail-
able in a Pb-free 16-pin QFN package.
Typical Application
3113.2008.05.1.10
ChargePump
V
BATTERY
C
1µF
IN
C
1µF
EN/SET
OUT
TM
High Efficiency 1.5X Fractional Charge Pumps For White LED Applications
VIN
OUT
EN/SET
AAT3113
GND
C1+
C1-
C2+
C2-
D1
D2
D3
D4
IN
and reduces quies-
D4
C1
1µF
C2
1µF
2
Cwire™) inter-
D3
w w w . a n a l o g i c t e c h . c o m
D2
IN
and
D1
AAT3113, AAT3114/14A
V
BATTERY
Features
• AAT3113: Four Outputs
• AAT3114/14A: Six Outputs
• 20mA Full-Scale Current
• Simple Serial Control (S
• Low Noise Constant Frequency Operation
• 33% Less Input Current Than Doubler Charge Pump
• High Accuracy Brightness Matching
• Small Application Circuit
• Regulated Output Current
• Automatic Soft Start
• V
• No Inductors
• 600kHz Switching Frequency
• I
• Temperature Range: -40°C to 85°C
• 12-Pin TSOPJW Package (AAT3113)
• 16-Pin QFN Package (AAT3114/14A)
Applications
• Programmable Current Source
• White LED Backlighting
▪
Q
IN
32-Position Logarithmic Scale with Digital Control
<1µA in Shutdown
Range: 2.7V to 5.5V
C
1µF
IN
C
1µF
EN/SET
OUT
PRODUCT DATASHEET
VIN
OUT
AAT3114/14A
EN/SET
GND
2
Cwire) Interface
C1+
C2+
C2-
C1-
D2
D3
D4
D5
D6
D1
D6
C1
1µF
C2
1µF
D5
D4
D3
D2
D1
1

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AAT3114ISN-20-T1 Summary of contents

Page 1

ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM General Description The AAT3113 and AAT3114/14A are low noise, constant frequency charge pump DC/DC converters that use frac- tional (1.5X) conversion to increase efficiency in white LED applications. ...

Page 2

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Pin Descriptions Pin Number Symbol AAT3114/14A AAT3113 N/A 5 ...

Page 3

... High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Part Number Descriptions Part Number V Range IN AAT3113ITP 3.0V ≤ V ≤ 5.5V IN AAT3114ISN 3.2V ≤ V ≤ 5.5V IN AAT3114AISN Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description V Input Voltage ...

Page 4

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Electrical Characteristics V = 3.5V -40°C to +85°C, unless otherwise noted. Typical values are ...

Page 5

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Typical Characteristics V = 3.5V 1µ ...

Page 6

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Typical Characteristics V = 3.5V 1µ ...

Page 7

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Typical Characteristics V = 3.5V 1µ ...

Page 8

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Functional Block Diagram EN/SET Functional Description The AAT3113 and AAT3114/14A devices are high effi- ciency 1.5X ...

Page 9

ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM Applications Information Current Level Settings LED current level is set via the serial interface according to a logarithmic scale where each code is 1dB greater than the previous ...

Page 10

ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM EN/SET Code T > 50ns HI ON Figure 3: Enable / Disable / LED Brightness Level Set Data Input. LED Selection AAT3113 and AAT3114/14A devices are ...

Page 11

ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM 700 V = 3.6V 600 IN 500 400 300 200 100 Output (LED) Current (mA) Figure 3: AAT3113/AAT3114 Input Power vs. LED ...

Page 12

ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM Driving White LED Display Module Backlights and Individual White LEDs Connected in Parallel The AAT3114/14A outputs are true constant current sources capable of driving up ...

Page 13

ChargePump ChargePump High Efficiency 1.5X Fractional Charge Pumps For White LED Applications High Efficiency 1.5X Fractional Charge Pumps For White LED Applications TM TM Application Circuits BATTERY 1µF EN/SET Figure 4: AAT3114/14A Application Driving a Display Module ...

Page 14

... REF Bottom View Side View PRODUCT DATASHEET PRODUCT DATASHEET 2 AAT3113ITP-20-T1 AAT3114ISN-20-T1 AAT3114AISN-20-T1 Pin 1 Identification 0.214 ± 0.036 3113.2008.05.1.10 3113.2008.05.1.10 ...

Page 15

... Phone (408) 737-4600 Fax (408) 737-4611 © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifi cations or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties relating to fi ...

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