Document
PT4227
1-10W Primary Side CC Regulator
GENERAL DESCRIPTION
The PT4227 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 PT4227 is available in an DIP-8L package.
FEATURES
CC Without Secondary Feedback Integrates 600V Power Switch Inductance Compensation Low Startup Current (<10uA) Adjustable Primary Side Current limit VCC/FB Over Voltage Protection VCC/FB UVLO Feedback Loop Open Circuit Protection Over Temperature Protection
APPLICATIONS
Sub 10W LED lighting applications
ORDERING INFORMATION
PACKAGE
DIP-8L,Pb free
TEMPERATURE RANGE
-40℃ to 85℃
ORDERING PART NUMBER
PT4227EDIH
TRANSPORT MEDIA
Tube/50 units
MARKING
PT4227 xxxxxX
Note:
xxxxxX
Assembly Factory Code Lot Number
TYPICAL APPLICATION CIRCUIT
D2 R2 C2 C4 R5
DC out
AC IN
C1 R1 D1
T1
NC
DRAIN
PT4227
CS
D3
DRAIN
VCC
R3
FB
R4 R6 C3
GND
China Resources Powtech (shanghai) Co. Ltd
PT4227_DS Rev EN1.0
WWW.CRPOWTECH.COM
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PT4227
1-10W Primary Side CC Regulator
PIN ASSIGNMENT
CS 1 8 DRAIN
PT4227
CS 2 GND FB 3 4
7 DRAIN 6 NC 5 VCC
DIP-8L
PIN DESCRIPTIONS
PIN No. DIP-8L 1,2 3 4 5 6 7,8 PIN NAMES CS GND FB VCC NC DRAIN DESCRIPTION Primary Side Current Sense Input Ground Feedback Winding Voltage Sense Input Power supply, the device is supplied by an auxiliary winding. Not connected Internal power switch output, drive primary winding
ABSOLUTE MAXIMUM RATINGS (note1)
SYM PARAMETER VALUE UNIT
VCC VFB,VCS VDRAIN Topt Tstg ESD
RΘJA
VCC pin Voltage FB,CS pin Input Voltage DRAIN pin Voltage Operating Junction Temp. Range Storage Temp. Range HBM
DIP_8L
-0.3~35 -0.3~5 -0.3~600 -40 to 150 -55 to 150 2000
107
V V V ℃ ℃ V
℃/W
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended Operating Range indicates conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the Operating Range. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance.
RECOMMENDED OPERATING RANGE
SYM PARAMETER VALUE UNIT
VCC TA
VCC pin Operating Voltage Operating Ambient Temperature
9.5~26 -20~85
V ℃
China Resources Powtech (shanghai) Co. Ltd
PT4227_DS Rev EN1.0
WWW.CRPOWTECH.COM
Page 2
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