AAT2830IBK-T1 AnalogicTech, AAT2830IBK-T1 Datasheet

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AAT2830IBK-T1

Manufacturer Part Number
AAT2830IBK-T1
Description
800mA Total Display Solution for Portable Devices
Manufacturer
AnalogicTech
Datasheet
General Description
The AAT2830/31 is a total solution IC for portable dis-
play applications. Based on a tri-mode charge pump
power engine, it is capable of delivering 800mA of
output current with individual driving circuitries for
light emitting diode (LED) backlights, photo flash, and
RGB. The high conversion efficiency and high level
of integration make the AAT2830/31 the optimum
solution for battery life and size-critical applications.
AnalogicTech's AS
Control™) serial digital input is used to enable, dis-
able, and set current for all of the outputs. Each back-
light LED output can be programmed to 30mA over 16
discrete steps. The AAT2830/31 can also deliver up to
600mA to drive flash LEDs over four individual chan-
nels, with excellent current matching between chan-
nels. A built-in safety timer function allows easy, one-
trigger system control for photo flash applications.
The RGB output can be adjusted to handle up to
60mA, and the AS
module in up to 4096 (AAT2830) or 64 (AAT2831)
color intensity combinations.
The AAT2830/31 is available in a Pb-free, thermal-
ly-enhanced 24-pin 4x4x0.75mm TQFN package.
Applications
Typical Application
2830.2007.09.1.0
Digital Still Cameras
LCD Display Modules
MP3 Players
White LED Drivers
Wireless Handsets
Single-Cell Li+
V
BATTERY
2
Cwire™ (Advanced Simple Serial
2
Cwire signal can drive the RGB
Serial Control
4.7μF
AS
C
2
IN
Cwire
2.2μF
C
OUT
EN/SET
IN
C1+ C1- C2+ C2-
OUT
1μF
C1
FL1 FL2 FL3 FL4
1μF
C2
AAT2830 / 31
BL1…BL4
Features
...
Input Supply Voltage Range: 2.7V to 5.5V
Tri-Mode (1X/1.5X/2X) Charge Pump:
— Delivers up to 800mA of Output Current
— Switching Frequency: Up to 2MHz
Total Display Solution for RGB and Backlight
Applications
— 6-Channel Backlight WLED Backlight
— 4-Channel Flash WLED Drive
— 3-Channel RGB
Single-Wire AS
Configuration/Control
— Fourteen Addressable Registers
— Fast, 1MHz Serial Interface
True Load Disconnect in Shutdown, I
Built-in Thermal Protection
Built-in Auto-Disable for Open LED Condition
Automatic Soft-Start Minimizes Inrush Current
Available in 4x4x0.75mm TQFN44-24 Package
800mA Total Display Solution
BL5 BL6
User-Programmable Full-Scale Current,
up to 30mA
User-Programmable Full-Scale Current,
up to 150mA
Torch/Flashlight/Movie Mode Operation
Auto-/Safety Flash Timer
User-Programmable Full-Scale Output
Current/Duty Cycle
AAT2830: 4096 Color/Intensity
Combinations
AAT2831: 64 Color/Intensity
Combinations
PGND
R G B
AGND
2
BSET
Cwire Serial Interface for
for Portable Devices
CT
RGB LED
ChargePump
C
0.1μF
AAT2830/31
T
R
280kΩ
SET
IN
< 1µA
1

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AAT2830IBK-T1 Summary of contents

Page 1

... RGB. The high conversion efficiency and high level of integration make the AAT2830/31 the optimum solution for battery life and size-critical applications. AnalogicTech Cwire™ (Advanced Simple Serial Control™) serial digital input is used to enable, dis- able, and set current for all of the outputs ...

Page 2

Pin Description Pin # Symbol Function 1 BL3 Power return (cathode) for backlight channel 3. If not used, connect to the OUT pin. 2 BL2 Power return (cathode) for backlight channel 2. If not used, connect to the OUT pin. ...

Page 3

Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description V [OUT, IN, BL1-BL6, FL1-FL4 GND N V [C1+, C2+] to GND N V [EN/SET, CT, BSET, C1-, C2-] to GND N T Operating ...

Page 4

Electrical Characteristics V = 3.6V 4.7µ 1µ values are T = 25°C. A Symbol Description Charge Pump Section V IN Operating Supply Voltage Range Operating Supply Current IN ...

Page 5

Electrical Characteristics V = 3.6V 4.7µ 1µ values are T = 25°C. A Symbol Description EN/SET Logic Control V EN/SET Input Low Threshold Voltage ENS(L) V EN/SET Input High Threshold Voltage ...

Page 6

Typical Characteristics AAT2830 Backlight Section Efficiency 100 30mA/Channel 2.1mA/Channel 40 30 2.7 3.1 3.5 3.9 4.3 Input Voltage (V) AAT2830 Flash Section Efficiency 100 90 80 Data 6, 75mA/Channel Data 16, 19mA/Channel ...

Page 7

Typical Characteristics EN/SET High Threshold Voltage vs. Input Voltage 1.2 25°C -40°C 1.1 1.0 0.9 0.8 0.7 85°C 0.6 0.5 0.4 0.3 0.2 2.7 3.1 3.5 3.9 4.3 Input Voltage (V) EN/SET Latch Timeout vs. Input Voltage 500 450 400 ...

Page 8

Typical Characteristics Turn Mode Backlight (30mA/channel; Address 0, Data 16 EN/SET (2V/div) V OUT (2V/div) V BLX (0.5V/div (0.2A/div) Time (200µs/div) Turn Mode Flash (150mA/channel; Address 4, Data 1; V ...

Page 9

... AS 2 Cwire Serial Interface Each current channel input on the AAT2830/31 is controlled by AnalogicTech's AS interface. The AS rising edges on the EN/SET pin to address and load the LED configuration registers Cwire ...

Page 10

Address 0 is signified by 17 rising edges, Address rising edges, Address rising edges, and so on. Data is set to any num- ber of rising edges between 1 and ...

Page 11

Data BSET Data Table 2a: Addresses 0-2 with Independent Channel Control Disabled, Backlight ...

Page 12

Data BL6 BL5 BL4 1 Off Off Off 2 Off Off Off 3 Off Off On 4 Off Off On 5 Off On Off 6 Off On Off 7 Off Off Off Off ...

Page 13

EN/SET 1 Address DATA 1 DATA 0 Figure 2: AS 160 140 120 100 Data Code Figure 3: Address ...

Page 14

Data FL1-FL4 Flash On Time 1 16/ 15/ 14/ 13/ 12/ 11/ 10/ 9/ 8/16 x ...

Page 15

Green on- time, followed by the Blue on-time, and then the RGB period T last. If DATA is set to 1, then after 11 the Red on-time is programmed the user will see ...

Page 16

Applications Information Adjusting the Maximum Backlight LED Current Level The value of R determines the maximum LED BSET current level for the backlight section. In the typical application, selecting R = 280kΩ results in a BSET maximum 30mA/channel LED current ...

Page 17

LED Selection The AAT2830/31 is designed to drive high-intensity white LEDs particularly suitable for LEDs with an operating forward voltage in the range of 4.2V to 1.5V. The AAT2830/31 can also drive other loads that have similar characteristics ...

Page 18

Evaluation Board Layout Figure 7: AAT2830/31 Evaluation Board Component Side Layout. Evaluation Board Schematic DC+ VIN J1 optional 100μF C7 lab supply bypass 100μF Figure 9: AAT2830/31 Evaluation Board Schematic. 18 800mA Total Display Solution Figure 8: AAT2830/31 Evaluation Board ...

Page 19

VIN SW1 SW2 SW3 SW4 SW5 Figure 9: AAT2830/31 Microcontroller Section Schematic. 2830.2007.09.1.0 800mA Total Display Solution R7 220 VIN VDD VSS 2 7 GP5 GP0 3 ...

Page 20

... Sample stock is generally held on part numbers listed in BOLD. 3. Contact factory for AAT2831 availability. 20 800mA Total Display Solution RGB Package Y Y TQFN44- TQFN44-24 Marking 1 SUXYY AAT2830/31 for Portable Devices Function Total Solution, 4096-Combination RGB Total Solution, 64-Combination RGB Part Number (Tape and Reel) 2 AAT2830IBK-T1 AAT2831IBK-T1 2830.2007.09.1.0 ...

Page 21

... 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 specifications or to discontinue any product or service with- out notice. Except as provided in AnalogicTech’ ...

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