CONTROL CIRCUITS. YD3842 Datasheet

YD3842 Datasheet PDF, Equivalent


Part Number

YD3842

Description

CURRENT MODE PWM CONTROL CIRCUITS

Manufacture

Wuxi Youda electronics

Total Page 4 Pages
PDF Download
Download YD3842 Datasheet PDF


YD3842 Datasheet
www.DataSheet4U.com
YOUDA INTEGRATED CIRCUIT
YD3842
CURRENT MODE PWM CONTROL CIRCUITS—YD3842
DESCRIPTION
The YD3842 provides the necessary features to implement off-line or DC fixed frequency current mode control
schemes with a minimal external parts count.
FEATURES
*Optimized For Off-line and DC to DC Converts
*Low Start up Current
*Automatic Feed Forward Compensation
*Pulse-by-Pulse Current Limiting
*Under-voltage Lookout with Hysteresis
*Double Pulse Suppression
*High Current Totem Pole Output
*Internally Trimmed Band-gap Reference
*500kHz Operation
BLOCK DIAGRAM
8
1/2
5V
REF
S/R
7
UVL
65
VCC
RS
+ EA
-
1/3
OSC
1V
1234
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel86-755-83740369
Fax86-755-83741418
Ver 5.0
1 of 4
2006-7-10

YD3842 Datasheet
www.DataSheet4U.com
YOUDA INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Tamb=25)
PARAMETER
Supply Voltage (Low impedance Source)
Output Current
Analog Inputs(pin 2, 3)
Error Amplifier Output Sink Current
Power Dissipation
SYMBOL
VCC
Io
VI(ANA)
lSINK(EA)
PD
VALUE
30
±1
-0.3 to +6.3
10
1.0
YD3842
UNIT
V
A
V
mA
W
ELECTRICAL CHARACTERISTICS
(Tamb=25, VCC1=10V, Vcc2=9.5V, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS
Reference Section
Output Voltage
VREF
Tj=25, Io=1mA
Line Regulation
Load Regulation
Output Noise Voltage
VREF
VREF
Vose
Long Term Stability
12VIN25V
1lo=20mA
10Hzf10kHz,
Tj=25(note 2)
Ta=25, 1000Hrs
(note 2)
Output Short Circuit
lsc
Oscillator Section
Initial Accuracy
Voltage Stability
Temp Stability
f
f/Vcc
Tj=25
12Vcc25V
TminTATmax
(note 2)
Amplitude
Vosc Vpin 4 peak to peak
Error Amplifier Section
Input Voltage
VI(EA)
Vpin 1=2.5V
Input Bias Current
AVOL
lBIAS
2Vo4V
Unity Gain
Bandwidth
PSRR
Tj=25(note 2)
12Vcc25V
Output Sink Current
lsink
Vpin2=2.7V,
Vpin 1=1.1V
Output Source
Current
Vout High
lsource
VOH
Vpin 2=2.3V, Vpin
1=5V
Vpin 2=2.3V, RL=15kΩ
to GND
Vout Low
Vpin 2=2.7V, Vpin
VOL
1=1.1V
MIN
4.90
-30
47
2.42
60
0.7
60
2
-0.5
5
TYP
5.00
6
6
50
5
-100
52
0.2
5
1.7
2.50
-0.3
90
1
70
6
-0.8
6
0.7
MAX UNIT
5.10 V
20 mV
25 MV
6 mV
25 mV
-180 mA
57 kHz
1%
%
V
2.58 V
-2 μA
dB
6.0 mHz
dB
mA
mA
V
1.1 V
WuXi YouDa Electronics Co., Ltd
2 of 4
Website: www.e-youda.com


Features Datasheet pdf www.DataSheet4U.com YOUDA INTEGRATED CI RCUIT YD3842 CURRENT MODE PWM CONTROL CIRCUITS—YD3842 DESCRIPTION The YD38 42 provides the necessary features to i mplement off-line or DC fixed frequency current mode control schemes with a mi nimal external parts count. FEATURES * Optimized For Off-line and DC to DC Con verts *Low Start up Current *Automatic Feed Forward Compensation *Pulse-by-Pul se Current Limiting *Under-voltage Look out with Hysteresis *Double Pulse Suppr ession *High Current Totem Pole Output *Internally Trimmed Band-gap Reference *500kHz Operation BLOCK DIAGRAM 8 7 UV L 1/2 5V REF S/R VCC 6 5 R S + EA 1/ 3 1V OSC 1 2 3 4 WuXi YouDa Electr onics Co., Ltd Add: No.5 Xijin Road, Na tional Hi-Tech Industrial Development Z one, Wuxi Jiangsu China Tel: 86-510-852 05117 86-510-85205106 Fax: 86-510-85205 110 Website: www.e-youda.com SHENZHEN O FFICE Tel: 86-755-83740369 Fax: 86- 755-83741418 Ver 5.0 1 of 4 2006-7-10 www.DataSheet4U.com YOUDA INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING.
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