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PT4203

PowTech
Part Number PT4203
Manufacturer PowTech
Description Primary Side CC Regulator
Published Jul 18, 2014
Detailed Description PT4203 Primary Side CC Regulator for LED driver DESCRIPTION： PT4203 is targeted to below 10W LED lighting applications. ...
Datasheet PDF File PT4203 PDF File

PT4203
PT4203

Overview
PT4203 Primary Side CC Regulator for LED driver DESCRIPTION： PT4203 is targeted to below 10W LED lighting applications.
It is designed for the flyback topology, and regulates output current without the secondary feedback loop.
The PT4203 provide accurate CC (constant current) regulation with built in compensation circuitry.
Integrated line and primary inductance compensation ensures output current free of line voltage and primary inductance variations.
Complete protection functions have been integrated allows PT4203 to protect against all fault conditions including cycle by cycle current limit, output open/short circuit, line under-voltage, and over temperature shut down.
PT4203 is available in SOT23-5 package.
FEATURES z z z z z z z z z z CC Control Without Secondary Feed back Compensates transformer Inductor Variation Compensates Line Voltage Variation Drive NPN or DNMOS Output Over Voltage Protection Output Short Circuit Protection Feedback resistor open circuit protection Line Under Voltage Protection Cycle by Cycle Current Limit Over Temperature Protection APPLICATIONS z 1-10W LED Power Supplier ORDERING INFORMATION PACKAGE SOT23-5 TEMPERATURE RANGE -40℃ to 85℃ ORDERING PART NUMBER PT4203E23E TRANSPORT MEDIA Tape and Reel MARKING 4203 TYPICAL APPLICATION CIRCUIT () PT4203_DSB Ver.
EN0.
1 1 PT4203 Primary Side CC Regulator for LED driver PIN ASSIGNMENT PIN DESCRIPTIONS NO.
1 2 3 4 5 PIN NAME SW GND FB VCC START DESCRIPTION Internal switch driver output， connects to the source of MOSFET System ground Feedback Winding Voltage Sense Input DC power supply pin, must be locally bypassed Start up control pin, connects to the gate of the MOSFET, must be locally bypassed ABSOLUTE MAXIMUM RATINGS (note 1,2,3) SYMBOL VCC START SW FB PDMAX PTR1 TJ TSTG HBM PARAMETER VCC supply voltage START input voltage SW output voltage FB input voltage Power dissipation (note 2) Heat resistance R θJA Junction temperature Storage temperature ESD sensitivity level (note 3) VALU...


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