YOUDA INTEGRATED CIRCUIT
Current Sense Section
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
Output Section
Output Low Level
V
OL
V
OH
t
R
t
F
lsink=20mA
lsink=200mA
lsource=20mA
lsource=200mA
Tj=25℃, C
L
=1nF
(note 2)
Tj=25℃, C
L
=1nF(note 2)
Vcc=5V, lsink=10mA
V
TH(ST)
V
OPR
(min
)
14.5
8.5
13
12
0.1
1.5
13.5
13.5
50
50
0.7
16
10
l
BIAS
Vpin 3=0 to 2V
Gv
V
I(MAX)
(note 3, 4)
Vpin 1=5V(note 3)
12≤Vcc≤25V
2.85
0.9
3
1
70
-2
150
YD3842
3.15
1.1
-10
300
0.4
2.2
V/V
V
dB
μA
ns
V
V
V
V
Output High Level
Rise Time
Fall Time
UVLO Saturation
150
150
1.2
17.5
11.5
ns
ns
V
V
V
Under-Voltage lockout Output Section
Start Threshold
Min. Operating Voltage
After Turn On
PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
Total Standby Current
Start-up Current
Operating Supply
Current
Vcc Zener Voltage
l
ST
Icc
(OPR)
Vz
Vpin 2=Vpin 3=0V
Icc=25mA
0.5
11
34
1
17
mA
mA
V
D
(MAX)
D
(MIN)
95
07
100
0
%
%
APPLICATION CIRCUIT
Vref
4.7ＫΩ
RT
100ＫΩ
1
2
3
4
CT
8
7
6
5
0.1μＦ
A
0.1μＦ
VCC
Error Amp
Adjust
4.7ＫΩ
Isense
Adjust
5κΩ
1κΩ
/1Ｗ
OUTPUT
WuXi YouDa Electronics Co., Ltd
3 of 4
Website: www.e-youda.com
YOUDA [ WUXI YOUDA ELECTRONICS CO.,LTD ]
