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AAT2860 데이터시트 PDF




Advanced Analogic Technologies에서 제조한 전자 부품 AAT2860은 전자 산업 및 응용 분야에서
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부품번호 AAT2860 기능
기능 Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
제조업체 Advanced Analogic Technologies
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AAT2860 데이터시트, 핀배열, 회로
www.DataSheet4U.com
ChargePumpTM
PRODUCT DATASHEET
AAT2860
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
General Description
The AAT2860-x is a highly integrated charge pump-based
lighting management unit (LMU) with three low dropout
(LDO) regulators optimized for single-cell lithium-ion/
polymer systems. The charge pump provides power for
all LED outputs; multiple backlight and flash LED configu-
rations are available. The backlight LED outputs can be
programmed up to 31mA each and the flash LED outputs
can be programmed up to 300mA each. An I2C compati-
ble serial digital interface is used to enable, disable, and
set the current to one of 32 levels for the backlight and
one of 16 levels for the flash. A programmable safety
timer and flash control input is included for easy flash
control. Backlight current matching is better than 3% for
uniform display brightness, and flash current matching is
better than 5% for uniform power dissipation.
The AAT2860-x offers three high-performance low-noise
MicroPower™ LDO linear regulators. The regulators are
enabled and their output voltages are set through the
I2C compatible serial interface. Each LDO can supply up
to 300mA load current and ground-pin current is only
80µA making the AAT2860-x ideal for battery-operated
applications.
The AAT2860-x is available in a Pb-free, space saving
TQFN34-24 package and operates over the -40°C to
+85°C ambient temperature range.
Features
• Input Voltage Range: 2.7V to 5.5V
I2C Compatible Serial Interface
• Tri-Mode Charge Pump
Drives up to Seven LEDs (Backlight/Flash)
• Programmable Backlight Current Settings
32 Levels - 0.5mA to 31mA
• Programmable Flash Current
16 Levels – OFF to 300mA
• 1MHz Switching Frequency
• Automatic Soft-Start
• Three Low Dropout Regulators
300mA Output Current
150mV Dropout
Programmable Output from 1.5V to 3.0V
Output Auto-Discharge for Fast Shutdown
• Built-In Thermal Protection
• -40°C to +85°C Temperature Range
• TQFN34-24 Package
Applications
• Camera Enabled Mobile Devices
• Digital Still Cameras
• Multimedia Mobile Phones
Typical Application
VBAT
3.6V
CIN
4.7µF
CIN
4.7µF
LED Select
Flash Level Select
I2C Serial SDA
Interface
SCL
LDO Select
C1 C2
1µF 1µF
C1+ C1- C2+ C2-
IN OUT
AAT2860-x
IN
LED_SEL
FL_LVL
SDA
SCL
BL1
BL2
BL3
BL4
BL5
BL6/FL1
BL7/FL2
LDOA
LDO_SEL LDOB
AGND
LDOC
PGND
WLEDs
OSRAM LW M673
or equivalent
VOUT
COUT
2.2µF
Flash LEDs
Lumiled LXCL-PWF1
or equivalent
VLDOC
at 300mA
CLDOC
2.2µF
VLDOB
at 300mA
CLDOB
2.2µF
VLDOA
at 300mA
CLDOA
2.2µF
2860.2008.05.1.0
www.analogictech.com
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AAT2860 pdf, 반도체, 판매, 대치품
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ChargePumpTM
PRODUCT DATASHEET
AAT2860
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Electrical Characteristics1
VIN = 3.6V; CIN = 4.7µF; COUT = CLDO(A, B, C) = 2.2μF; C1 = C2 = 1µF; TA = -40°C to +85°C, unless otherwise noted.
Typical values are TA = 25°C.
Symbol Description
VIN IN Operating Voltage Range
IIN IN Operating Current
IIN(SHDN) IN Shutdown Current
TSD Over-Temperature Shutdown Threshold
TSD(HYS) Over-Temperature Shutdown Hysteresis
Charge Pump Section
VIN(TH_H, BL)
BL1-BL7 Charge Pump Mode Transition
Hysteresis
VIN(TH_H, FL)
FL1-FL2 Charge Pump Mode Transition
Hysteresis
fOSC Charge Pump Oscillator Frequency
tCP(SS) Charge Pump Soft-start Time
BL1-BL5, BL6/FL1, BL7/FL2 LED Drivers
tLED(SU) LED Output Current Start-up Time
IBLx
IBL_(DAT-
A7DH)
ΔI(BLx)/
IBL(AVG)
VBL_(TH)
BL1-BL7 Current Accuracy
BL1-BL7 Current Accuracy
BL1-BL7 Current Matching2
BL1-BL7 Charge Pump Transition Threshold
tFADE
BL1-BL7 Automatic Fade Out Timer
IFL[1/2] FL1, FL2 Current Accuracy, -4 Option
IFL[1/2] FL1, FL2 Current Accuracy, -4 Option
IFL2 FL2 Current Accuracy, -2 and -3 Options
IFL2 FL2 Current Accuracy, -2 and -3 Options
Conditions
LED_SEL = IN, LDO_SEL = FL_LVL =
AGND; ADDR = 02H, DATA = 4CH
2X Mode; LED_SEL = IN, FL_LVL = LDO_
SEL = AGND; BL1-BL7 = OPEN
2X Mode; LED_SEL = IN, FL_LVL = IN;
LDO_SEL = AGND; FL1-FL2 = OPEN
LED_SEL = FL_LVL = AGND, LDO_SEL =
IN; ADDR = 01H; DATA = 0EH; No Load
LED_SEL, LDO_SEL, FL_LVL = AGND
LED_SEL = IN, ADDR = 02H, DATA = 6CH;
FL_LVL = AGND, LDO_SEL = AGND
TA = 25°C
TA = 25°C
OUT: 0V to IN
LED_SEL = IN, ADDR=02H, DATA=6CH;
VIN – VF = 1V; FL_LVL = LDO_SEL = AGND
LED_SEL = IN, ADDR=02H, DATA=7DH;
VIN – VF = 1V; FL_LVL = LDO_SEL = AGND
LED_SEL = IN, ADDR=02H, DATA=6CH;
VIN – VF = 1V; FL_LVL = LDO_SEL = AGND
LED_SEL = IN, ADDR=02H, DATA=60H,
VIN – VF = 1V; FL_LVL = LDO_SEL = AGND
LED_SEL = IN, ADDR=02H, DATA=6CH;
VIN – VF = 1V; FL_LVL = LDO_SEL = AGND
LED_SEL = FL_LVL = IN, ADDR=04H,
DATA=03H; VIN - VF = 1V, LDO_SEL =
AGND
LED_SEL = FL_LVL = IN, ADDR = 04H,
DATA=60H; VIN - VF = 1V, LDO_SEL =
AGND
LED_SEL = FL_LVL = IN, ADDR = 04H,
DATA=03H; VIN - VF = 1V, LDO_SEL=
AGND
LED_SEL = FL_LVL = IN, ADDR = 04H,
DATA=60H; VIN - VF = 1V, LDO_SEL =
AGND
Min Typ Max Units
2.7 5.5 V
0.65 mA
5.5 mA
5.5 mA
220
1.0
140
15
µA
µA
˚C
˚C
0.15
1
1
100
V
V
MHz
µs
20
27 30
33
2.55 3 3.45
3
0.18
1
µs
mA
mA
%
V
s
270 300 330 mA
54 60 66
mA
540 600 660 mA
108 120 132 mA
1. The AAT2860 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. Current matching is defined as the deviation of any sink/channel current from the average of all active channels.
4
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AAT2860 전자부품, 판매, 대치품
www.DataSheet4U.com
ChargePumpTM
PRODUCT DATASHEET
AAT2860
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Backlight Mode Efficiency vs. Input Voltage
100
90
80
70
60
50
30mA/ch, VF = 3.95V
40 15mA/ch, VF = 3.5V
4.2mA/ch, VF = 3.4V
30
2.7 3.1 3.5 3.9 4.3 4.7
5.1 5.5
Input Voltage (V)
Flash Efficiency vs. Input Voltage
100
90
160mA/ch, VF = 3.15V
320mA/ch, VF = 3.25V
80
70
60
50
40
30
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
Backlight Current Matching vs. Temperature
(VIN = 3.6V; 30mA/Channel)
33
32
31
30
29
28 Channel 1 - Channel 5/6/7
27
26
25
-40 -15 10 35 60 85
Temperature (°C)
Charge Pump Output Turn-On Characteristic
(VIN = 3.6V; 0mA/Channel; COUT = 2.2V)
4
2
04
3
2
1
0
Time (20µs/div)
Flash Mode Turn-On Characteristic
(VIN = 4.2V; 300mA/Channel; 1x Mode)
VFL_LVL
(2V/div)
VOUT
(2V/div) 4
VFLX 2
(2V/div) 0
IIN
(200mA/div)
4
2
0
600
400
200
0
Time (20µs/div)
Flash Mode Turn-On Characteristic
(VIN = 3.6V; 300mA/Channel; 1.5x Mode)
VFL_LVL
(2V/div)
VOUT
(2V/div) 4
VFLX 2
(2V/div) 0
IIN
(200mA/div)
4
2
0
600
400
200
0
Time (50µs/div)
2860.2008.05.1.0
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