AT1780
Preliminary Product Information
640kHz/1.2MHz,Low-Noise Step-Up
Current-Mode PWM Controller
Typical Characteristics
(VIN = 3.3V, FREQ = GND, TA=25℃, unless otherwise noted.)
Efficiency vs. Output current
95
AT1780
Efficiency vs. Output current
95
AT1780
90
90
85
Efficiency Eff (%)
Efficiency Eff (%)
Vin=3.3V
Vout=10V
fosc=640kHz
L=10uH
1
10
100
Output current Iout (mA)
1000
85
80
80
75
75
70
70
Vin=3.3V
Vout=10V
fosc=1.2MHz
L=4.7uH
1
10
100
Output current Iout (mA)
1000
65
65
Output voltage vs. Output current
10.10
AT1780
Output voltage vs. Output current
10.10
10.05
Output voltage Vout (V)
10.00
9.95
9.90
9.85
9.80
9.75
9.70
9.65
Vin=3.3V
Vout=10V
fosc=1.2MHz
L=4.7uH
0
40
80
120
160
200
Output current Iout (mA)
240
AT1780
10.05
Output voltage Vout (V)
10.00
9.95
9.90
9.85
9.80
9.75
9.70
9.65
Vin=3.3V
Vout=10V
fosc=640kHz
L=10uH
0
40
80
120
160
200
Output current Iout (mA)
240
CH1:Output voltage,100mV/div/AC
CH4:Output current,100mA/div/DC
Vout=10V,fosc=640kHz,L=10uH
R1=100k,C1=470PF,C2=18PF
CH1:Output voltage,100mV/div/AC
CH4:Output current,100mA/div/DC
Vout=10V,fosc=1.2MHz,L=4.7uH
R1=100k,C1=470PF,C2=18PF
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
3/24/06 REV 1.1
Email:
service@aimtron.com.tw
5
AIMTRON [ AIMTRON TECHNOLOGY ]
