AIC1648 Ver la hoja de datos (PDF) - Analog Intergrations
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AIC1648 Datasheet PDF : 10 Pages
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AIC1648
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
90
85
VIN=3.0V
80
75
VIN=4.2V
VIN=3.6V
70
3 LEDs, 10µH
L1: 976AS-100M, TOKO
65
D1: RB521S-30, ROHM
Test circuit refer to Fig.1
60
0
5 LED Cur1r0ent (mA) 15
20
Fig. 8 3 LEDs Efficiency vs. LED Current
90
VIN=4.2V
85
80
75
70
65
60
0
Fig. 9
VIN=3.6V
VIN=3.0V
4 LEDs, 10µH
L1: 976AS-100M, TOKO
D1: RB521S-30, ROHM
Test circuit refer to Fig.1
5
10
15
20
LED Current (mA)
4 LEDs Efficiency vs. LED Current
85
VIN=4.2V
80
75
VIN=3.6V
VIN=3.0V
70
5 LEDs, 10µH
L1: 976AS-100M, TOKO
65
D1: RB521S-30, ROHM
Test circuit refer to Fig.1
60
0
5 LED Cur1r0ent (mA) 15
20
Fig. 10 5 LEDs Efficiency vs. LED Current
90
VIN=4.2V
85
80
75
VIN=3.0V
VIN=3.6V
70
3 LEDs, 6.8µH
L1: 976AS-6R8M, TOKO
65
D1: RB521S-30, ROHM
Test circuit refer to Fig.1
60
0
5
10
15
20
LED Current (mA)
Fig. 11 3 LEDs Efficiency vs. LED Current
VSHDN, 2V/div
VOUT, 2V/div
IINDUCTOR, 100mA/div
VIN=3.6V; 3 LEDs; L1=10µF; COUT=0.22µF; ILED=20mA
Fig. 12 Start-Up from Shutdown
VOUT, 100mV/div
IINDUCTOR, 100mA/div
VSW, 10V/div
VIN=3.6V; 3 LEDs; L1=10µF; COUT=0.22µF; ILED=10mA
Fig. 13 Operation Wave Form
5
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