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| AAT3104 Datasheet, PDF (5/15 Pages) Advanced Analogic Technologies – Low Cost 1x/2x 4 Channel Charge Pump WLED Driver | |||
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ChargePumpTM
PRODUCT DATASHEET
AAT3104178
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
Typical Characteristics
VIN = 3.6V, CIN = COUT = C1 = 1μF; TA = 25°C, unless otherwise noted.
1X Mode Turn-On Waveform
(VIN = 4.2V; Load = 120mA)
2X Mode Turn-On Waveform
(VIN = 3.6V; Load = 120mA)
VLED
(2V/div) 0
IIN 0
(200mA/div)
VOUT
(2V/div) 0
EN
0
(1V/div)
Time (200µs/div)
VLED
(2V/div) 0
IIN 0
(250mA/div)
VOUT
(2V/div)
0
EN
(1V/div) 0
Time (200µs/div)
2X Mode Turn-Off Waveform
(VIN = 3.6V; Load = 120mA)
IIN
(250mA/div)
0
VLED
(2V/div)
0
EN
(1V/div) 0
Time (200µs/div)
VOUT
(AC Coupled) 0
(20mV/div)
2X Mode Output Ripple
(VIN = 3.6V; Load = 120mA)
VIN
(AC Coupled) 0
(5mV/div)
Time (0.4µs/div)
1mA to 30mA LED Current Step
(VIN = 4.2V)
VLED
2V/div
IIN 0
200mA/div 0
VOUT 0
2V/div
EN
1V/div
0
Time (80µs/div)
30mA to 1mA LED Current Step
(VIN = 4.2V)
VLED
(2V/div)
IIN 0
(200mA/div) 0
VOUT 0
(2V/div)
EN
(1V/div)
0
Time (80µs/div)
3104.2008.09.1.0
www.analogictech.com
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