RT9368A Datasheet, PDF (8/12 Pages) Richtek Technology Corporation – 4-Channel Charge Pump White LED Driver with Low Dropout Current Source

RT9368A
VIN
(2V/Div)
VOUT
(2V/Div)
Dimming Operation
VIN = 3.3V
VIN
(2V/Div)
VOUT
(2V/Div)
Dimming Operation
VIN = 3.6V
EN
(2V/Div)
ILED
(20mA/Div)
Time (1ms/Div)
EN
(2V/Div)
ILED
(20mA/Div)
Time (1ms/Div)
x1 Mode Inrush Current Response
VIN = 4.2V, CIN = COUT = 2.2uF, CPUMP = 1uF
x1.5 Mode Inrush Current Response
VIN = 3.7V, CIN = COUT = 2.2uF, CPUMP = 1uF
VIN
(2V/Div)
VOUT
(5V/Div)
EN
(2V/Div)
IIN
(500mA/Div)
Time (25us/Div)
VIN
(2V/Div)
VOUT
(5V/Div)
EN
(2V/Div)
IIN
(500mA/Div)
Time (100us/Div)
x2 Mode Inrush Current Response
VIN = 3V, CIN = COUT = 2.2uF, CPUMP = 1uF
VIN
(2V/Div)
VOUT
(5V/Div)
EN
(2V/Div)
IIN
(500mA/Div)
Time (100us/Div)
x2 Mode EN Pin Shutdown Response
CIN = COUT = 2.2uF, CPUMP = 1uF
C2N
(2V/Div)
VOUT
(5V/Div)
EN
(2V/Div)
ILED
(500mA/Div)
Time (500us/Div)
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8
DS9368A-06 April 2011