AAT2848 Analogic Corporation, AAT2848 Datasheet - Page 4

• Manufacturer Part Number: AAT2848
• Manufacturer: Analogic Corporation

Electrical Characteristics
V
T
4
4
ChargePump
ChargePump
A
Symbol Description
Charge Pump Section
BL1-BL4 Backlight LED Outputs
FL1-FL2 Flash LED Outputs
IN
I
V
I
I
I
T
V
V
= -40°C to +85°C, unless otherwise noted. Typical values are T
OUT(MAX)
ΔI
IN(SHDN)
BL_(MAX)
ΔI
FL_(MAX)
IN(TH_H)
I
= 3.6V; C
SD(HYS)
BL_(TH)
FL_(TH)
f
T
V
IN(Q)
t
OSC
(BL_)
(FL_)
SS
SD
IN
IN Operating Voltage Range
IN Operating Current
IN Shutdown Current
Thermal Shutdown
Thermal Shutdown Hysteresis
CP Maximum Output Current
Charge Pump Mode Transition
Hysteresis
Charge Pump Oscillator
Frequency (1.5X mode)
Charge Pump Soft Start Time
BL1-BL4 Current Accuracy
BL1-BL4 Current Matching
BL1-BL4 Charge Pump Mode
Transition Threshold
FL1-FL2 Current Accuracy
FL1-FL2 Current Matching
FL1-FL2 Charge Pump Mode
Transition Threshold
IN
= 4.7μF; C
TM
TM
High-Current Charge Pump For Backlight Display and Flash Applications
High-Current Charge Pump For Backlight Display and Flash Applications
OUT
= 2.2μF; C1 = C2 = 1μF; R
Conditions
BENS = IN, FENS = AGND, BL1 = BL2 = BL3 = BL4 = OUT
(Excluding LED Current)
BENS = IN, FENS = AGND, BL1 = BL2 = BL3 = BL4 = OPEN
(1.5x CP, no load)
BENS = AGND, FENS = IN, FL1 = FL2 = OUT
(Excluding LED Current)
BENS = AGND, FENS = IN, FL1 = FL2 = OPEN
(2x CP, no load)
BENS = FENS = AGND
IN = 3V
BENS = DATA1
T
BENS = DATA1; V
BENS = DATA32; V
BENS = DATA1; V
Any backlight current sink/channel BL1, BL2, BL3, BL4
FENS = DATA1; V
FENS = DATA16; V
FENS = DATA1; V
Any fl ash current sink/channel FL1, FL2
1
A
= 25°C
w w w . a n a l o g i c t e c h . c o m
w w w . a n a l o g i c t e c h . c o m
IN
IN
IN
IN
IN
IN
– V
– V
– V
– V
– V
BSET
– V
F
F
F
F
F
F
= 1.5V
= 1.5V
= 1.5V
= 1.5V
= 15kΩ; R
= 1.5V
= 1.5V
A
= 25°C.
FSET
= 14.3kΩ; C
PRODUCT DATASHEET
PRODUCT DATASHEET
FLTMR
AAT2848
AAT2848
Min
0.26
5.66
720
180
2.7
18
= 0.33μF; C
Typ
0.32
6.66
140
100
100
120
200
300
1.0
±3
±3
15
20
2848.2008.05.1.0
2848.2008.05.1.0
Max
0.39
7.66
600
600
220
5.5
5.5
5.5
1.0
22
FADE
= 47nF;
Units
MHz
mA
mA
mA
mV
mA
mV
mA
mV
μA
μA
μA
°C
°C
μs
%
%
V