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參數(shù)資料
| 型號： | TQFN34-20 |
| 廠商： | ANADIGICS, Inc. |
| 英文描述： | Four-Channel Backlight Driver with Dual LDOs |
| 中文描述： | 四通道雙LDO的背光驅(qū)動器 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 392K |
| 代理商： | TQFN34-20 |
AAT2847
Four-Channel Backlight Driver with Dual LDOs
4
2847.2007.09.1.0
Electrical Characteristics
1
V
IN
= 3.6V; C
IN
= C
LDOA
= C
LDOB
= 2.2μF; C
OUT
= 1μF; C1 = C2 = 1μF; T
A
= 25°C, unless otherwise noted.
Typical values are at T
A
= 25°C.
1. The AAT2847 is guaranteed to meet performance specifications over the –40C 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.
Symbol
Power Supply
V
IN
I
SHDN
Charge Pump
Description
Conditions
Min Typ Max Units
Input Voltage Range
Total Shutdown Current at IN
2.7
5.5
1.0
V
μA
V
EN/SET
= V
ENA
= V
ENB
= 0V
I
IN
Input Operating Current
1x Mode, 3.0
≤
V
IN
≤
5.5, Active, No Load,
V
ENA
= V
ENB
= 0V
1.5x Mode, 3.0
≤
V
IN
≤
5.5, Active, No
Load, V
ENA
= V
ENB
= 0V
2x Mode, 3.0
≤
V
IN
≤
5.5, Active, No Load,
V
ENA
= V
ENB
= 0V
DATA 1, 20mA Range
DATA 2, ADDRESS 4
DATA 1, 30mA Range
DATA 1, 15mA Range
V
IN
- V
F
= 1.5V, 20mA Range
1.0
mA
4.0
5.0
I
DX
Average Current Accuracy
18
0.9
20
1.0
30
15
0.5
22
1.1
mA
I
(D-Match)
Current Matching
2
1x to 1.5x or 1.5x to 2x Transition
Threshold at Any DX Pin
Clock Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
EN/SET Logic Control
T
EN/SET LO
EN/SET Low Time
T
EN/SET_HI_MIN
Minimum EN/SET High Time
T
EN/SET_HI_MAX
Maximum EN/SET High Time
T
OFF
EN/SET Off Timeout
T
LAT
EN/SET Latch Timeout
EN/SET Logic Low Threshold
Voltage
1
%
V
TH
20mA Range
150
mV
f
CLK
1
MHz
T
SD
140
C
T
HYS
15
C
0.3
75
μs
ns
μs
μs
μs
50
75
500
500
V
IL(EN/SET)
0.4
V
V
IH(EN/SET)
EN/SET Logic High Threshold
Voltage
EN/SET Input Leakage
1.4
V
I
EN/SET
V
EN/SET
= V
IN
= 5V
-1
1
μA
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