AAT3105 Datasheet, PDF (4/15 Pages) Advanced Analogic Technologies – Low Cost 1x/2x 4 Channel Charge Pump WLED Driver

ChargePump^TM
PRODUCT DATASHEET
AAT3105178
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
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
Input Power Supply
IN
Input Voltage Range
I_IN
Input Operating Current
I_IN(SHDN) Input Shutdown Current
Charge Pump Section
I_OUT
OUT Maximum Output Current
V_OUT
Charge Pump Output Voltage
f_OSC
Charge Pump Oscillator Frequency
V_{IN_(TH)} Charge Pump Mode Hysteresis
t_OUT
LED Output Current Start-up Time
LED Current Source Outputs
I_{D_(MAX)} D1 – D4 Current Accuracy
ΔI_{D_(MAX)} D1 – D4 Current Matching
I_{D_(10%)} D1 – D4 Current Accuracy
V_{D_(TH)}
D1- D4 Charge Pump Mode
Transition Threshold
EN/PWM Current Control
V_ENH
EN/PWM Input High Threshold
Voltage
V_ENL
EN/PWM Input Low Threshold
Voltage
I_EN(LKG)
t_PWM(ON)
t_EN/PWM
EN/PWM Input Leakage Current
PWM Control Turn-on Delay
EN/PWM Input OFF Timeout
f_PWM
PWM Control Frequency
Conditions
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
When charge pump is on
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.
EN/PWM = IN = 5V
Duty cycle = 80%
Min Typ Max Units
2.7
5.5
V
6.1 8.0 mA
3.0 4.6 mA
6.0 8.0 mA
1
μA
0.60
150
5
0.85
150
110
1.05
250
mA
V
MHz
mV
μs
27 30 33
mA
-3
3
%
3.2
mA
380
mV
1.4
V
0.4
V
-1
1
μA
2
μs
0.15
1
ms
50 kHz
4
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3105.2008.10.1.0