AAT1270_08 Datasheet, PDF (7/18 Pages) Advanced Analogic Technologies – 1A Step-Up Current Regulator for Flash LEDs

SwitchReg^TM
Typical Characteristics
FLEN ON Delay Time vs. Input Voltage
200
180
160
140
-40°C
120
100
80
60 _{25°C 85°C}
40
20
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
PRODUCT DATASHEET
AAT1270
1A Step-Up Current Regulator for Flash LEDs
Flash Inhibit On Delay Time
(EN/SET = 0V; FLEN = 3.3V; 500mA/ch)
FLINH
(2V/div) _0V
V_OUT
(2V/div)
4
V_SINK
2
(2V/div)
0
1A
I_LED
(500mA/div)
Time (100µs/div)
Movie Mode Turn On
(13.7mA/ch)
EN/SET
(2V/div) ^0V
V_OUT
(2V/div) ^0V
V_SINK 0V
(2V/div)
I_{LED 0A}
(100mA/div)
Time (200µs/div)
Movie Mode Turn On
(68.5mA/ch)
EN/SET
(2V/div)
0V
0V
V_OUT
(2V/div)
V_SINK ^0V
(2V/div)
I_LED 0A
(100mA/div)
Time (100µs/div)
Movie Mode to Flash Mode Turn On
(68.5mA/ch to 500mA/ch)
FLEN
(2V/div)
0V
V_OUT
(2V/div)
V_SINK
(2V/div)
I_LED
(1A/div)
4
2
0
1A
Time (100µs/div)
FLEN
(2V/div)
0V
V_{OUT 0V}
(2V/div)
V_SINK
(2V/div) ^0V
I_{IN 0A}
(1A/div)
Flash Mode Turn On
(500mA/ch)
Time (100µs/div)
1270.2008.07.1.5
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