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Silan Microelectronics

SD4841 Datasheet Preview

SD4841 Datasheet

(SD4840 - SD4844) Current Mode PWM Controller

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SD4840/4841/4842/4843/4844
CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE
MOSFET
DESCRIPTION
SD4840/4841/4842/4843/4844 is a current mode PWM controller
with low standby power and low start current for power switch. In
standby mode, the circuit enters burst mode to reduce the standby
power dissipation.
The switch frequency is 67KHz with ±2.5 KHz jitter frequency for
low EMI.
The stress on transformer during power on is reduced by the built-
in 15ms soft start circuit to avoid the saturation of transformer.
SD4840/4841/4842/4843/4844 includes under voltage lock-out,
over voltage protection, leading edge blanking, over current
protection and the temperature protection. The circuit will restart
automatically until the system is normal after the protection is
active.
FEATURES
* Lower start-up current (Typ.6μA)
* Frequency jitter for low EMI
* Overcurrent protection
* Overvoltage protection
* Undervoltage lockout
* Built-in temperature protection
* Built-in high voltage MOSFET
www.DataShee*t4AUu.ctoomrestart mode
* Built-in soft start
* Burst mode operation
* Cycle by cycle current limit
APPLICATIONS
* Switch power
ORDERING INFORMATION
Part No.
Package
Marking
SD4840P67K65
SD4840P67K65
SD4841P67K65
SD4841P67K65
SD4842P67K65
DIP-8-300-2.54
SD4842P67K65
SD4843P67K65
SD4843P67K65
SD4844P67K65
SD4844P67K65
Note: P denotes it is available in DIP8 package, 67k denotes 67KHz, and 65 denotes withstand voltage is 650V.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.2 2008.12.17
Page 1 of 11




Silan Microelectronics

SD4841 Datasheet Preview

SD4841 Datasheet

(SD4840 - SD4844) Current Mode PWM Controller

No Preview Available !

SD4840/4841/4842/4843/4844
TYPICAL OUPUT POWER CAPABILITY
Device
SD4840P67K65
SD4841P67K65
SD4842P67K65
SD4843P67K65
SD4844P67K65
190~265VAC
Adapter
Open
7W 9W
10W
14W
12W
17W
14W
19W
16W
21W
BLOCK DIAGRAM
85~265VAC
Adapter
Open
5W 7.2W
8W 12W
10W
14W
12W
15W
14W
18W
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATING
Characteristics
Drain-Gate Voltage (RGS=1MΩ)
Gate-Source (GND) Voltage
SD4840P67K65
SD4841P67K65
Drain Current Pulse (note1) SD4842P67K65
SD4843P67K65
SD4844P67K65
Symbol
VDGR
VGS
IDM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Rating
650
±30
4
6
8
11
14
Unit
V
V
A
REV:1.2 2008.12.17
Page 2 of 11


Part Number SD4841
Description (SD4840 - SD4844) Current Mode PWM Controller
Maker Silan Microelectronics
Total Page 11 Pages
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