PRODUCT DATASHEET
AAT3105178
ChargePump
TM
Electrical Characteristics
IN = EN = 3.6V, C
IN
= 1μF, C
OUT
= 1μF, C
P
= 1μF, T
A
= -40°C to 85°C unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
Description
Conditions
Min
2.7
IN = 5.5V, EN = IN, VD1 = VD2 = VD3= VD4 = 0V
IN = 5.5V, EN = IN, I
D1
= I
D2
= I
D3
= I
D4
= FS, V
D1
=
V
D2
= V
D3
= V
D4
= IN – 1.5V, Excluding I
DN
current
Operating, I
D1
= I
D2
= I
D3
= I
D4
= OPEN
EN/PWM = GND
6.1
3.0
6.0
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
Typ
Max
5.5
8.0
4.6
8.0
1
Units
V
mA
mA
mA
μA
mA
V
MHz
mV
μs
mA
%
mA
mV
Input Power Supply
IN
Input Voltage Range
I
IN
Input Operating Current
Input Shutdown Current
I
IN(SHDN)
Charge Pump Section
I
OUT
OUT Maximum Output Current
V
OUT
Charge Pump Output Voltage
Charge Pump Oscillator Frequency
f
OSC
Charge Pump Mode Hysteresis
V
IN_(TH)
LED Output Current Start-up Time
t
OUT
LED Current Source Outputs
D1 – D4 Current Accuracy
I
D_(MAX)
D1 – D4 Current Matching
ΔI
D_(MAX)
I
D_(10%)
D1 – D4 Current Accuracy
D1- D4 Charge Pump Mode
V
D_(TH)
Transition Threshold
EN/PWM Current Control
EN/PWM Input High Threshold
V
ENH
Voltage
EN/PWM Input Low Threshold
V
ENL
Voltage
I
EN(LKG)
EN/PWM Input Leakage Current
t
PWM(ON)
PWM Control Turn-on Delay
EN/PWM Input OFF Timeout
t
EN/PWM
f
PWM
PWM Control Frequency
When charge pump is on
0.60
I
D1
= I
D2
= I
D3
= I
D4
=30mA
EN/PWM =IN
Duty Cycle = 100%
Duty Cycle = 100%, V
IN
– V
F
= 1.5V
Duty Cycle = 10%, V
IN
– V
F
= 1.5V
I
D1
= I
D2
= I
D3
= I
D4
=30mA, V
IN
– V
D1
is measured.
27
-3
150
5
0.85
150
110
30
3.2
380
1.05
250
33
3
1.4
0.4
EN/PWM = IN = 5V
-1
2
0.15
Duty cycle = 80%
1
50
1
V
V
μA
μs
ms
kHz
4
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3105.2008.10.1.0
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