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PT4227 Datasheet Preview

PT4227 Datasheet

1-10W Primary Side CC Regulator

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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
Powtechs 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.
ORDERING INFORMATION
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
PACKAGE
TEMPERATURE
ORDERING PART NUMBER
RANGE
DIP-8LPb free
-40to 85
PT4227EDIH
Note:
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tube/50 units
MARKING
PT4227
xxxxxX
TYPICAL APPLICATION CIRCUIT
AC IN
C1
R1
R2 C2
D1 T1
D3
R3
R4 R6
NC
CS
VCC
FB
C3
DRAIN
DRAIN
GND
D2
C4 R5 DC out
China Resources Powtech (shanghai) Co. Ltd
PT4227_DS Rev EN1.0
WWW.CRPOWTECH.COM
Page 1




PowTech

PT4227 Datasheet Preview

PT4227 Datasheet

1-10W Primary Side CC Regulator

No Preview Available !

PIN ASSIGNMENT
PT4227
1-10W Primary Side CC Regulator
CS 1
CS 2
GND 3
FB 4
8 DRAIN
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
VCC pin Voltage
-0.3~35
V
VFBVCS
VDRAIN
Topt
FBCS pin Input Voltage
DRAIN pin Voltage
Operating Junction Temp. Range
-0.3~5
-0.3~600
-40 to 150
V
V
Tstg Storage Temp. Range
-55 to 150
ESD HBM
2000
V
RΘJA
DIP_8L
107 /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
VCC
TA
PARAMETER
VCC pin Operating Voltage
Operating Ambient Temperature
VALUE
9.5~26
-20~85
UNIT
V
China Resources Powtech (shanghai) Co. Ltd
PT4227_DS Rev EN1.0
WWW.CRPOWTECH.COM
Page 2


Part Number PT4227
Description 1-10W Primary Side CC Regulator
Maker PowTech
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PT4227 Datasheet PDF






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