AIC1650
TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25°C)
ꢀ
Shutdown Current vs VIN
VREF Source Current vs VIN
350
300
250
200
150
20
15
10
5
0
4
8
12
16
20
4
6
8
10
12
14
16
18
20
VIN (V)
VIN (V)
Duty Cycle vs VIN Voltage
Frequency vs VIN Voltage
330
280
100
90
80
70
60
50
Ta=0 C
°
230
180
°
Ta=70 C
Ta=25°C
Ta=0°C
Ta=70°C
130
80
Ta=25°C
4
8
12
16
20
4
8
12
16
20
VIN (V)
VIN (V)
BLOCK DIAGRAM
ꢀ
VIN
CURRENT LIMIT
COMPARATOR
1
70mV
8
7
VIN
+
CL
-
PFM
OSCILLATOR
VIN
2
LATCH
VREF
DHI
1.22V
OUTPUT DRIVER
3
REFERENCE
VOLTAGE
6
5
SHDN
DLOW
GND
+
-
4
FB
ERROR COMPARATOR
3