PT4207
Universal High Brightness LED Driver
GENERAL DESCRIPTION
PT4207 is an AC/DC buck constant current driver for
high power LED lighting applications. The IC uses a
constant off-time control scheme. Both off time and
peak LED current is externally programmed. The
operating duty cycle can be as wide as 100% and it can
power LED load from a 20V-450V power supply. The
peak LED current compensation makes sure the LED
current is stable within the overall input range.
The PT4207 integrates a 350mA low side switch.
Besides, it provides EXT pin to drive external low side
power switch to extend current capacity. The dedicated
DIM input can accept either a 0.5V-2.5V analog dim
signal or a PWM dim signal. Multi protection is
integrated into PT4207 including output open/short
circuit protection and soft over temperature protection.
Built in soft start greatly reduces the inrush current
during start up.
PT4207 is available in SOP8 package.
FEATURES
Support 20VDC-450VDC input range application
LED string up to hundreds of diodes
Built-in 20V/350mA low side power switch
Low side power switch extendable
Up to 100% duty cycle
0.5V-2.5V analog dim and PWM dim acceptable
Built in 4mS soft start
LED string open/short circuit protection
Soft over temperature protection
APPLICATION
AC/DC LED lighting
RGB Backlighting LED Driver
Signal and Decorative LED lighting
E27/PAR30/PAR38 power supplier
ORDERING INFORMATION
PACKAGE
SOP-8
Note:
xxxxxX
TEMPERATURE
RANGE
-40 oC to 85 oC
ORDERING PART
NUMBER
PT4207ESOH
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
MARKING
PT4207
xxxxxX
TYPICAL APPLICATION
AC IN
BD
FUSE
C1
400V
68µF
D4
R3 D5
1M SBD
LED(s)
8 EXT
GATE
6
Q1
D3
1
DIM
5
SOURCE
D2
C2
400V
68µF
7
VDD
2
Toff
C3
10uF R1
100K
CS
GND
4
3
C4
4.7µF
R2
0.71
L1
2mH
Use built-in low side power switch, for <350mA application
C5
4.7uF
China Resources Powtech (Shanghai) Limited
PT4207_DSB Rev EN_0.2
WWW.CRPOWTECH.COM
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