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Número de pieza
componentes Descripción
AIC1648CG Ver la hoja de datos (PDF) - Analog Intergrations
Número de pieza
componentes Descripción
Fabricante
AIC1648CG
Built-in OVP White LED Step-Up Converter
Analog Intergrations
AIC1648CG Datasheet PDF : 10 Pages
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AIC1648
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
11.0
10.
5
10.0
9.5
9.0
8.5
3 LEDs
I
LED
=20mA
8.0
7.5
6 Samples' Temperature Data
7.0
-40 -20 0
20 40 60 80 100
Temperature (
°
C)
Fig. 14 Output voltage vs. temperature
25
20
15
V
IN
=4.2V
10
V
IN
=3.6V
V
IN
=3.3V
5
V
IN
=2.5V
4 LEDs
0
-80 -60 -40 -20 0 20 40 60 80 100
Temperature (
°
C)
Fig. 15 LED Current vs. Temperature
BLOCK DIAGRAM
OVP
Over Voltage
Comparator
27V
+
-
PWM/PFM
Control
95mV
VIN
VREF
Error
+
AMP
Control
Driver
M1
Logic
+
*
-
PWM
Comparator
FB
-
1.2MHz
Slope
Oscillator
RC*
Compensation
CC
*
Internal
Soft Start
+
-
Current AMP.
RS*
SHDN
SW
GND
6
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