AAT2860 Datasheet, PDF (7/23 Pages) Advanced Analogic Technologies – Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit

PRODUCT DATASHEET
AAT2860
ChargePump^TM Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Backlight Mode Efficiency vs. Input Voltage
100
90
80
70
60
50
30mA/ch, VF = 3.95V
40
15mA/ch, VF = 3.5V
4.2mA/ch, VF = 3.4V
30
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Flash Efficiency vs. Input Voltage
100
90
160mA/ch, VF = 3.15V
320mA/ch, VF = 3.25V
80
70
60
50
40
30
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Backlight Current Matching vs. Temperature
(V_IN = 3.6V; 30mA/Channel)
33
32
31
30
29
28
Channel 1 - Channel 5/6/7
27
26
25
-40
-15
10
35
60
85
Temperature (°C)
Charge Pump Output Turn-On Characteristic
(V_IN = 3.6V; 0mA/Channel; C_OUT = 2.2V)
4
2
0
4
3
2
1
0
Time (20µs/div)
Flash Mode Turn-On Characteristic
(V_IN = 4.2V; 300mA/Channel; 1x Mode)
4
V_{FL_LVL}
2
(2V/div)
0
V_OUT
(2V/div) ⁴
V_FLX ²
(2V/div) ₀
600
400
I_IN
200
(200mA/div)
0
Time (20µs/div)
Flash Mode Turn-On Characteristic
(V_IN = 3.6V; 300mA/Channel; 1.5x Mode)
4
V_{FL_LVL}
(2V/div)
2
0
V_OUT
(2V/div) ⁴
V_FLX ²
(2V/div) ₀
600
400
I_IN
200
(200mA/div)
0
Time (50µs/div)
2860.2008.05.1.0
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