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| AAT2847_08 Datasheet, PDF (4/20 Pages) Advanced Analogic Technologies – Four-Channel Backlight Driver with Dual LDOs | |||
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ChargePumpTM
PRODUCT DATASHEET
AAT2847
Four-Channel Backlight Driver with Dual LDOs
Electrical Characteristics1
VIN = 3.6V; CIN = CLDOA = CLDOB = 2.2µF; COUT = 1µF; C1 = C2 = 1µF; TA = 25°C, unless otherwise noted. Typical values
are at TA = 25°C.
Symbol Description
Power Supply
VIN
Input Voltage Range
ISHDN
Total Shutdown Current at IN
Charge Pump
IIN
Input Operating Current
IDX
Average Current Accuracy
I(D-Match)
Current Matching2
VTH
1x to 1.5x or 1.5x to 2x Transition
Threshold at Any DX Pin
fCLK
Clock Frequency
TSD
Over-Temperature Shutdown Threshold
THYS
Over-Temperature Shutdown Hysteresis
EN/SET Logic Control
TEN/SET LO EN/SET Low Time
TEN/SET_HI_MIN Minimum EN/SET High Time
TEN/SET_HI_MAX Maximum EN/SET High Time
TOFF
EN/SET Off Timeout
TLAT
EN/SET Latch Timeout
VIL(EN/SET) EN/SET Logic Low Threshold Voltage
VIH(EN/SET) EN/SET Logic High Threshold Voltage
IEN/SET
EN/SET Input Leakage
Conditions
VEN/SET = VENA = VENB = 0V
1x Mode, 3.0 ⤠VIN ⤠5.5, Active, No Load,
VENA = VENB = 0V
1.5x Mode, 3.0 ⤠VIN ⤠5.5, Active, No Load,
VENA = VENB = 0V
2x Mode, 3.0 ⤠VIN ⤠5.5, Active, No Load,
VENA = VENB = 0V
DATA 1, 20mA Range
DATA 2, ADDRESS 4
DATA 1, 30mA Range
DATA 1, 15mA Range
VIN - VF = 1.5V, 20mA Range
20mA Range
VEN/SET = VIN = 5V
Min Typ Max Units
2.7
5.5
V
1.0
µA
1.0
4.0 mA
5.0
18 20 22
0.9 1.0 1.1
30
15
0.5 1
150
1
140
15
mA
%
mV
MHz
°C
°C
0.3
75
µs
50
ns
75
µs
500
µs
500
µs
0.4
V
1.4
V
-1
1
µA
1. The AAT2847 is guaranteed to meet performance specifications over the â40°C to +85°C operating temperature range is assured by design, characterization and correlation
with statistical process controls.
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
4
www.analogictech.com
2847.2008.05.1.2
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