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AAT2848 Datasheet(PDF) 4 Page - Advanced Analogic Technologies

Part # AAT2848
Description  High-Current Charge Pump For Backlight Display and Flash Applications
PDF  19 Pages
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Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT2848 Datasheet(HTML) 4 Page - Advanced Analogic Technologies

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AAT2848
High-Current Charge Pump For Backlight Display and Flash Applications
ChargePump
TM
PRODUCT DATASHEET
4
2848.2008.05.1.0
www .analogictech.com
AAT2848
High-Current Charge Pump For Backlight Display and Flash Applications
ChargePump
TM
PRODUCT DATASHEET
4
2848.2008.05.1.0
www .analogictech.com
Electrical Characteristics1
VIN = 3.6V; CIN = 4.7μF; COUT = 2.2μF; C1 = C2 = 1μF; RBSET = 15kΩ; RFSET = 14.3kΩ; CFLTMR = 0.33μF; CFADE = 47nF;
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol Description
Conditions
Min Typ Max Units
VIN
IN Operating Voltage Range
2.7
5.5
V
IIN(Q)
IN Operating Current
BENS = IN, FENS = AGND, BL1 = BL2 = BL3 = BL4 = OUT
(Excluding LED Current)
600
μA
BENS = IN, FENS = AGND, BL1 = BL2 = BL3 = BL4 = OPEN
(1.5x CP, no load)
5.5
mA
BENS = AGND, FENS = IN, FL1 = FL2 = OUT
(Excluding LED Current)
600
μA
BENS = AGND, FENS = IN, FL1 = FL2 = OPEN
(2x CP, no load)
5.5
mA
IIN(SHDN)
IN Shutdown Current
BENS = FENS = AGND
1.0
μA
TSD
Thermal Shutdown
140
°C
TSD(HYS)
Thermal Shutdown Hysteresis
15
°C
Charge Pump Section
IOUT(MAX)
CP Maximum Output Current
IN = 3V
720
mA
VIN(TH_H)
Charge Pump Mode Transition
Hysteresis
BENS = DATA1
100
mV
fOSC
Charge Pump Oscillator
Frequency (1.5X mode)
TA = 25°C
1.0
MHz
tSS
Charge Pump Soft Start Time
100
μs
BL1-BL4 Backlight LED Outputs
IBL_(MAX)
BL1-BL4 Current Accuracy
BENS = DATA1; VIN – VF = 1.5V
18
20
22
mA
BENS = DATA32; VIN – VF = 1.5V
0.26 0.32
0.39
ΔI(BL_)
BL1-BL4 Current Matching
BENS = DATA1; VIN – VF = 1.5V
±3
%
VBL_(TH)
BL1-BL4 Charge Pump Mode
Transition Threshold
Any backlight current sink/channel BL1, BL2, BL3, BL4
120
mV
FL1-FL2 Flash LED Outputs
IFL_(MAX)
FL1-FL2 Current Accuracy
FENS = DATA1; VIN – VF = 1.5V
180
200
220
mA
FENS = DATA16; VIN – VF = 1.5V
5.66 6.66
7.66
ΔI(FL_)
FL1-FL2 Current Matching
FENS = DATA1; VIN – VF = 1.5V
±3
%
VFL_(TH)
FL1-FL2 Charge Pump Mode
Transition Threshold
Any flash current sink/channel FL1, FL2
300
mV



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