Datasheet.kr   

AAT1236 데이터시트 PDF




Advanced Analog Technology에서 제조한 전자 부품 AAT1236은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AAT1236 자료 제공

부품번호 AAT1236 기능
기능 High Efficiency White LED Drivers
제조업체 Advanced Analog Technology
로고 Advanced Analog Technology 로고


AAT1236 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 24 페이지수

미리보기를 사용할 수 없습니다

AAT1236 데이터시트, 핀배열, 회로
General Description
The AAT1236 is a highly integrated, high efficiency
power solution for white LED and keypad backlights
in mobile/portable devices. It is based on a switching
boost converter which steps up the single cell lithi-
um-ion/polymer battery voltage to drive 5 strings of
series-connected white LEDs with precision current
regulation. The AAT1236 is capable of driving a total
of four LEDs per channel.
The boost converter can produce an output drive of
up to 24V at 100mA. The high switching frequency
(up to 2MHz) provides fast response to load tran-
sients and allows the use of small external compo-
nents. A fully integrated control circuit simplifies the
design and reduces total solution size.
A two-wire I2C serial digital interface is used to indi-
vidually turn each output sink on/off and adjust the
LED current by group. Unlike conventional pulse
width modulation (PWM) control of LED brightness,
the AAT1236 drives the LEDs with constant, non-
pulsating current. The interface is fully compliant to
the Fast/Standard mode I2C specification, allowing a
transfer rate of up to 400kHz.
A similar device is also available with a proprietary
Advanced Simple Serial Control™ (AS2Cwire™) sin-
gle wire interface; please see the AAT1235 datasheet.
The AAT1236 is available in a Pb-free, thermally-
enhanced 16-pin 3x4mm TDFN package and is
specified for operation over the -40°C to +85°C tem-
perature range.
Typical Application
L=2.2µH
D1
AAT1236
High Efficiency White LED Drivers
for Backlight and Keypad
Features
SwitchReg
• Input Supply Voltage Range: 2.7V to 5.5V
• Maximum Boost Output Drive: Up to 24V at 100mA
• Up to 85% Efficient Operation
• Up to 2MHz Switching Frequency with Small
Inductor
• User-Programmable Full-Scale LED Current,
Up to 30mA
• Two-Wire, I2C Compliant Serial Interface
— Two Addressable Registers
• Independent LED Current Control by Group
— Backlight Group B1-B2, 16 Settings
— Auxiliary Group A1-A3, 16 Settings
• Independent LED ON/OFF Control
— Fast, 400kHz Serial Transfer Rate
• Non-Pulsating, High-Performance LED Current
Drive for Uniform Illumination
— 10% Absolute Accuracy
— 2% Channel-to-Channel Matching
• Over-Voltage and Over-Temperature Protection
• Automatic Soft-Start Minimizes Large Inrush
Current at Startup
• Available in 3x4mm TDFN34-16 Package
Applications
• Digital Still Cameras (DSCs)
• Keypad Backlight
• Large Panel Displays
• Mobile Handsets
• PDAs and Notebook PCs
• Personal Media Players
• White LED Backlight
Up to 24V max
Keypad or
RGB LEDs
COUT
2.2µF
1236.2007.02.1.1
Input :
2.7V~5.5V
CIN
2.2µF
LIN
VIN
IN
Enable
I2C
Interface
SDA
SCL
Backlight
LEDs
SW B 1 B 2 A 1 A 2 A 3
AAT1236
OV
EN SDA SCL
RSET GND AGND
R1
22.6kΩ
R2
187kΩ
R3
12.1kΩ
1




AAT1236 pdf, 반도체, 판매, 대치품
AAT1236
High Efficiency White LED Drivers
for Backlight and Keypad
Electrical Characteristics1
VIN = 3.6V; CIN = 2.2µF;TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol Description
Power Supply
VIN
VOUT(MAX)
Input Voltage Range
Maximum Output Voltage
VUVLO
UVLO Threshold
ICC Operating Current (No Switching)
ISHDN(MAX)
IOX
IDX
IDX-Matching
VOV
RDS(ON)N
RDS(ON)IN
VIN Pin Shutdown Current
Maximum Continuous Output Current
Current Sink Accuracy
Current Matching Between Any
Sink Channels
OVP Threshold Voltage
OVP Threshold Hysteresis
Low Side Switch On Resistance
Input Disconnect Switch
TSS Soft-Start Time
ISET Current Set Ratio
ILIMIT
Input Switch Current Limit
Enable Input – EN
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
I2C Serial Interface – SCL, SDA
FSCL
TLOW
THIGH
THD_STA
TSU_STA
TSU_DAT
THD_DAT
TSU_STO
TBUF
Clock Frequency
Clock Low Period
Clock High Period
Hold Time START Condition
Setup Time for Repeat START
Data Setup Time
Data Hold Low
Setup Time for STOP Condition
Bus Free Time Between STOP
and START Condition
VIL Input Threshold Low
VIH Input Threshold High
II Input Current
VOL Output Logic Low (SDA)
Conditions
Min
2.7
VIN Rising
Hysteresis
VIN Falling
B1 = B2 = A1 = A2 = A3 = 1.2V,
2mA Setting, RSET = 226kΩ
EN = GND
VO = 24V
RSET = 22.6kΩ
RSET = 22.6kΩ,
A1 = A2 = A3 = B1 = B2 = 0.4V
VOUT Rising
1.8
100
18
1.1
IOUT = 100mA
IOUT = 100mA
From Enable to Output
Regulation; VFB = 300mV
ISINK/IRSET, VRSET = 0.6V
1.2
1.4
2.7 VIN 5.5
2.7 VIN 5.5
IPULLUP = 3mA
1.3
0.6
0.6
0.6
100
0
0.6
1.3
1.4
-1.0
Typ
150
20
2
1.2
100
80
200
300
760
Max Units
5.5 V
24 V
2.7 V
mV
V
300 µA
1.0 µA
mA
22 mA
5%
1.3 V
mV
mΩ
mΩ
µs
A/A
A
0.4 V
V
400 kHz
µs
µs
µs
µs
ns
0.9 µs
µs
µs
0.4 V
V
1.0 µA
0.4 V
1. The AAT1236 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
4 1236.2007.02.1.1

4페이지










AAT1236 전자부품, 판매, 대치품
Typical Characteristics
21.2
21.0
20.8
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
19.0
-40
LED Current vs. Temperature
(All Channels = 20mA)
IA3
IB1
IB2
IA2
IA1
-15 10 35 60
Temperature (°C)
85
AAT1236
High Efficiency White LED Drivers
for Backlight and Keypad
LED Current Accuracy vs. Temperature
(All Channels = 20mA)
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-40
IB1
IA2
IB2, A1
IA3
-15 10
35
60
85
Temperature (°C)
5
Enable (V)
0
50
IGROUP_A (mA) 0
IGROUP_B (mA)
0.5
IINDUCTOR (A)
0
Shutdown Operation
(All Channels)
50
0
Time (50µs/div)
Output Ripple
(All Channels = 20mA)
14.5
14.0
13.5
16V
0V
1.0
0.5
0.0
Time (200ns/div)
Output Ripple
(All Channels = 10mA)
13.5
13.0
12.5
14V
0V
0.5
0.0
Time (200ns/div)
Switching Frequency vs.
Supply Voltage and Temperature
2.5
2.0 25°C
1.5
-40°C
1.0
+85°C
0.5
0.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Supply Voltage (V)
1236.2007.02.1.1
7

7페이지


구       성 총 24 페이지수
다운로드[ AAT1236.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
AAT1230

Step-Up Converter

AAT
AAT
AAT1230-1

18V 100mA Step-Up Converter

Advanced Analogic Technologies
Advanced Analogic Technologies

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵