參數(shù)資料
型號(hào)： AAT1270
廠商： Advanced Analogic Technologies, Inc.
英文描述： 1A Step-Up Current Regulator for Flash LEDs
中文描述： 第1A升壓電流調(diào)節(jié)器的閃光燈發(fā)光二極管
文件頁(yè)數(shù)： 4/18頁(yè)
文件大?。?/td> 734K
代理商： AAT1270
AAT1270
1A Step-Up Current Regulator for Flash LEDs
4
1270.2007.07.1.0
1. The AAT1270 is guaranteed to meet performance specification from 0C to +70C. Specification over the –40C to +85°C operating
temperature range is assured by design, characterization and correlation with statistical process controls.
Electrical Characteristics
1
V
IN
= 3.6V; C
IN
= 2.2μF; C
OUT
= 2.2μF; R
SET
= 162kΩ; T
A
= 0°C to 70°C, unless otherwise noted. Typical val-
ues are T
A
= 25°C.
Symbol
Power Supply
V
IN
V
OUT(MAX)
Description
Conditions
Min
Typ
Max Units
Input Voltage Range
Maximum Output Voltage
2.7
5.5
5.5
1
V
V
FLEN = IN, Set FL Load = 1A
EN/SET = IN, Set FL Load = 0A,
R
SET
= 162k
Ω
EN/SET = FLEN = FLINH = GND
R
SET
= 162k
Ω
; FLOUTA + FLOUTB
0.57
I
IN(Q)
V
IN
Supply Current
0.23
mA
I
SHDN(MAX)
I
FL(TOTAL)
V
IN
Shutdown Current
Total Output Current, Flash Mode
FLOUTA and FLOUTB Current
Matching
1
μA
mA
800
1000
1200
I
FL(MATCH)
10
%
I
MM(TOTAL)
Total Output Current, Movie Mode
R
SET
= 162k
Ω
; Movie Mode Current
Set = 100%;FLOUTA + FLOUTB
T
A
= 25C
C
T
= 47nF
137
mA
f
OSC
t
DEFAULT
T
SD
T
SD(HYS)
EN/SET/ FLEN/ FLINH Logic Control
V
EN/SET(L)
,
EN/SET, FLEN Input Low
V
FLEN(L)
Threshold
V
EN/SET(H)
,
)
EN/SET, FLEN Input High
V
FLEN(H
Threshold
I
EN/SET
EN/SET Input Leakage Current
I
FLEN
FLEN Input Leakage Current
V
T(FLINH)
FLINH Input Threshold Voltage
R
IN(FLINH)
FLINH Input Resistance to AGND
t
EN/SET(LOW)
EN/SET Serial Interface Low Time
t
EN/SET(HI_MIN)
Minimum EN/SET High Time
t
EN/SET(HI_MAX)
Maximum EN/SET High Time
t
EN/SET(OFF)
EN/SET Off Timeout
t
EN/SET(LAT)
EN/SET Latch Timeout
t
FLEN_ON
FLEN ON Delay Time
t
FLEN_OFF
FLEN OFF Delay Time
t
FLINH_ON
FLINH ON Delay Time
t
FLINH_OFF
FLINH OFF Delay Time
Switching Frequency
Default ON time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
1.5
2.0
1
140
15
2.5
MHz
s
°C
°C
0.4
V
1.4
V
V
EN/SET
= V
IN
= 5V
V
FLEN
= V
IN
= 5V
-1
-1
1
1
μA
μA
V
kΩ
μs
ns
μs
μs
μs
μs
μs
μs
μs
V
IN
200
0.3
75
50
75
500
500
EN/SET = GND
EN/SET = GND
100
20
100
5
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