Document
PT4204
Primary Side CC Regulator for LED driver
DESCRIPTION:
PT4204 is targeted to sub-5W LED lighting applications. It is designed for the flyback topology, and regulates output current without the secondary feedback loop. A 600V power switch is integrated into PT4204 witch is helpful for reducing the circuit board dimension and system total cost. Accurate CC (constant current) regulation can be achieved 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 PT4204 to protect against all fault conditions including cycle by cycle current limit, output open/short circuit, line under-voltage, and over temperature shut down. PT4204 is available in SOP-8 package.
FEATURES
z z z z z z z z z CC Control Without Secondary Feed back Compensates transformer Inductor Variation Built in 600V power switch 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 1~5W LED Power Supplier
ORDERING INFORMATION
PACKAGE
SOP8 Note:
xxxxxX
Assembly Factory Code
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TEMPERATURE RANGE
-40℃ to 85℃
ORDERING PART NUMBER
PT 4204ESOH
TRANSPORT MEDIA
Tape and Reel
MARKING
PT4204 xxxxxX
Lot Number
TYPICAL APPLICATION CIRCUIT
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HV DC INP
LED+
LED-
START
DRAIN
VCC GND
FB
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PT4204_DSB Ver. EN0.1
1
PT4204
Primary Side CC Regulator for LED driver
PIN ASSIGNMENT PIN DESCRIPTIONS
NO. 1 2 3 4 5,6 7,8 PIN NAME NC START VCC FB GND DRAIN DESCRIPTION No connection Start up control pin, must be locally bypassed DC power supply pin, must be locally bypassed Feedback Winding Voltage Sense Input Ground Internal 600V switch drain
ABSOLUTE MAXIMUM RATINGS (note 1, 2, 3)
SYMBOL VCC START FB DRAIN PDMAX PTR1 TJ TSTG HBM PARAMETER VALUE -0.3~6 -0.3~15 -0.3~6 -0.3~600 0.43 150 -40 to 150 -55 to 150 2
o
UNIT V V V V W C /W
o o
VCC Supply Voltage
START input voltage FB input range DRAIN maximum reverse voltage Power dissipation (note2) Heat resistance R θJA Junction temperature
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C C
Storage temperature ESD sensitivity level(note3)
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kV
RECOMMENDED OPERATING RANGE
SYMBOL VCC TOPT PARAMETER Power supply voltage Operating ambient temperature VALUE 5.5 -20 to +85 UNIT V
o
C
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. Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA)/ θJA or the number given in Absolute Maximum Ratings, whichever is lower. Note 3: Human body model, 100pF discharged through a 1.5kΩ resistor.
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PT4204_DSB Ver. EN0.1
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PT4204
Primary Side CC Regulator for LED driver
ELECTRICAL CHARACTERISTICS
(TOPT=25℃, VCC=5.5V,unless specified otherwise) SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT
VCC Supply and Start up (VCC andSTART) VSTART_ON VSTART_OFF VSTART_CLMP VCC VCC_CLMP VCC_UVLO ICH START on threshold START off threshold START clamp voltage VCC operating voltage VCC clamp voltage VCC UVLO threshold VCC charge current I(VCC)=5mA VCC falling VCC=0V,VDRAIN=20V 4.0 -7.5 START rising START falling I(VSTART)=5mA 9 5.5 11.5 11 7.5 13 6 6.5 4.5 -5 5 -2.5 13 9.5 14.5 V V V V V V mA
Feedback(FB) VFBMAX VFBMIN IFB_OPEN FB over voltage threshold FB minimum voltage FB open loop protection threshold 2.25 2.5 0.50 -120 2.75 V V uA
OSCILLATOR FB=2.25V, Fosc DMAX Oscillator frequency
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IFB×Ton=1.5mA*uS note(4)
60
65 60
70
kHz %
Maximum duty cycle
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Driver output(DRAIN)
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RDS(ON) IDS BVDS TLEB Protection ILIMIT TSD TSDHYS TAR_ON
On state resistance Off state leak current DRAIN breakdown voltage Current sense leading edge blanking time
VSTART=12V IDRAIN=410mA VSTART=0,VDS=600V
,
8
15 25
Ω uA V
VSTART=0,IDRAIN=250uA
600 300
ns
SW peak current Over temperature shut down threshold Over temperature shut down hysterises Fault condition restart time
di/dt=100 mA/us
381
410 150 50 4
438
mA ℃ ℃ S
Note 4:including±7% jittering
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PT4204_DSB Ver. EN0.1
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PT4204
Primary Side CC Regulator for LED driver
SIMPLIFIED BLOCK DIAGRAM
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PT4204_DSB Ver. EN0.1
4
PT4204
Primary Side CC .