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AAT3143 Datasheet(PDF) 4 Page - Advanced Analogic Technologies

No. de pieza AAT3143
Descripción Electrónicos  High Efficiency 1X/1.5X/2X Charge Pump with PWM Control for White LED Applications
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Fabricante Electrónico  ANALOGICTECH [Advanced Analogic Technologies]
Página de inicio  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

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Electrical Characteristics1
CIN = CCP = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C,
VIN = 3.5V.
Symbol
Description
Conditions
Min
Typ
Max
Units
Input Power Supply
VIN
Operation Range
2.7
5.5
V
ICC
Operating Current
VD1:D4 = 2.0V, CP = 1X
550
µA
No Load Current, CP = 1.5X
3
5
ISHDN
Shutdown Current
EN/PWM = 0
1
µA
IDX
Output Current Accuracy
IOUT = 20mA, TA = 25°C, VIN = 3.5V
18
20
22
mA
I(D-Match)
Current Matching2
VD1:D4 = 3.6V, VIN = 3.5V
-3
±0.5
3
%
ηCP
Charge Pump Efficiency
VIN = 3.5V, IOUT(TOTAL) = 80mA,
93
%
Measured from IN to CP
Charge Pump Section
FCLK
Clock Frequency
1000
kHz
EN/PWM
VEN(L)
Enable Threshold Low
0.4
V
VEN(H)
Enable Threshold High
1.4
V
FPWM
Maximum PWM Frequency
50
kHz
tON(MIN)
Minimum Pulse Width
2
µs
AAT3143
High Efficiency 1X/1.5X/2X Charge Pump with
PWM Control for White LED Applications
4
3143.2006.05.1.0
1. The AAT3143 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
2. Current matching is defined as I(D-Match) = (ID - IAVE)/IAVE.


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