YD3842 Datasheet, PDF (3/4 Pages) Wuxi Youda electronics Co.,LTD – CURRENT MODE PWM CONTROL CIRCUITS

YOUDA INTEGRATED CIRCUIT
YD3842
Current Sense Section
Gain
Gv
(note 3, 4)
2.85 3 3.15 V/V
Maximum Input Signal
PSRR
Input Bias Current
VI(MAX)
lBIAS
Vpin 1=5V(note 3)
12≤Vcc≤25V
0.9
1
1.1
V
70
dB
-2 -10 μA
Delay to Output
Vpin 3=0 to 2V
150 300 ns
Output Section
Output Low Level
VOL
lsink=20mA
lsink=200mA
0.1 0.4 V
1.5 2.2 V
Output High Level
Rise Time
Fall Time
UVLO Saturation
lsource=20mA
13 13.5
V
VOH
lsource=200mA
12 13.5
V
Tj=25℃, CL=1nF
tR
(note 2)
50 150 ns
tF
Tj=25℃, CL=1nF(note 2)
50 150 ns
Vcc=5V, lsink=10mA
0.7 1.2 V
Under-Voltage lockout Output Section
Start Threshold
VTH(ST)
Min. Operating Voltage
VOPR(min)
After Turn On
14.5 16 17.5 V
8.5 10 11.5 V
PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
Total Standby Current
D(MAX)
D(MIN)
95 07 100 %
0
%
Start-up Current
Operating Supply
Current
lST
Icc(OPR)
Vpin 2=Vpin 3=0V
0.5
1
mA
11 17 mA
Vcc Zener Voltage
Vz
Icc=25mA
34
V
APPLICATION CIRCUIT
Error Amp
Adjust
RT
1
8
2
7
3
6
4
5
CT
Vref
A
VCC
1κΩ
/1ï¼·
OUTPUT
WuXi YouDa Electronics Co., Ltd
3 of 4
Website: www.e-youda.com