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PT4230 Datasheet

Primary Side CC Regulator

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PT4230
Primary Side CC Regulator
GENERAL DESCRIPTION
The PT4230 is primary side constant
current regulator, which is designed for high
performance and cost-effective LED lighting
applications. With Powtech’s proprietary
constant current compensation technique
accurate output current regulation is achieved
without the need of a secondary feedback
circuitry. Integrated primary inductance
compensation circuitry provides accurate
constant current operation despite variations in
primary inductance. Excellent EMI performance
is achieved with frequency jittering function
together with soft driving control at totem pole
gate drive output.
The device integrates a high voltage power
switch, an oscillator, a current sense circuit, CC
control circuit. It also features a complete set of
integrated protection functions to protect
against all fault conditions including output
open/short circuit, line under-voltage, and over
temperature shut down.
The PT4230 is available in a SOP-8 package.
ORDERING INFORMATION
FEATURES
CC Without Secondary Feedback
Integrates 600V Power Switch
Inductance Compensation
Low Startup Current (<10uA)
Adjustable Primary Side Current limit
FB Over Voltage Protection
VCC/FB UVLO
Feedback Loop Open Circuit Protection
Over Temperature Protection
APPLICATIONS
LED lighting applications
PACKAGE
SOP-8
Note:
TEMPERATURE
ORDERING PART NUMBER
RANGE
-40to 85
PT4230ESOH
TRANSPORT
MEDIA
Tape and Reel
2500 units
xxxxxX
Assembly Factory Code
Lot Number
MARKING
PT4230
xxxxxX
TYPICAL APPLICATION CIRCUIT
AC IN
R1
C1
D3 C2
R5
R4
C3 R2
D1
VCC DRAIN
T1
GND
CS
FB
R3
D2
C4 R6
DC
OUT
AC IN
R1
C1
VCC DRAIN
C2
GND
CS
FB
R3
C3
R2
D1
R4
R5
T1
C4
D2
R6
DC
OUT
Application for three winding
Application for Double winding
CR POWTECH (SHANGHAI) CO., LTD.
PT4230_DS_Rev EN 1.0
WWW.CRPOWTECH.COM
Page 1


Part Number PT4230
Description Primary Side CC Regulator
Maker PowTech
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