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PT4107 Datasheet Preview

PT4107 Datasheet

Universal High Brightness LED Driver

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PT4107
Universal High Brightness LED Driver
with Improved Current Regulation and EMI Performance
GENERAL DESCRIPTION
The PT4107 is a high voltage buck control IC for
constant LED current regulation. It allows efficient
operation of High Brightness (HB) LEDs from voltage
sources ranging from 18VDC up to 450VDC or
110VAC/220VAC. The PT4107 controls an external
MOSFET at fixed switching frequency from 25 kHZ to
200 kHZ. The frequency can be programmed using an
external resistor. A proprietary peak current control
method keeps constant average LED currents for wide
input and output ranges. The output current can be
programmed from a few milliamps up to more than 1A.
The output current on one LED string also can be
programmed to any value between zero and its
maximum value by applying an external control voltage
at the linear dimming control input of the PT4107.
Moreover, PT4107 provides a low-frequency PWM
dimming input that can accept an external control
signal with duty ratio of 0-100% and a frequency of up
to a few kilohertz.
Frequency jittering is used to reduce the EMI.
ORDERING INFORMATION
FEATURES
z Proprietary constant-current control.
z Wide input range from 18V to 450V or
110VAC/220VAC
z Applications from a few mA to more than 1A
Output
z up to hundreds of LEDs
z PWM Low-Frequency Dimming via Enable pin
z Linear Dimming via LD pin
z Frequency jittering for better EMI performance
z Programmable Over temp Protection (OTP)
APPLICATION
z AC/DC LED Driver applications
z RGB Backlighting LED Driver
z Signal and Decorative LED lighting
TEMPERATURE
PACKAGE
RANGE
ORDERING PART
NUMBER
SOP-8
-40to 85
PT4107ESOH
Note:
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
2500 units
MARKING
PT4107
xxxxxX
TYPICAL APPLICATION CIRCUIT
D1
1N4004
1N4004
C1
400V
C2
AC 22µF
R1
47KO
C3
1µF
VIN
LD GATE
PWMD
CS
D2
SBD
L1 LED(s)
2mH
Q1
4N60
1N4004
1N4004
NTC
ROTP GND RI
SW RT1
5K NTC
R2
300KO
R3
0.71
O
China Resources Powtech (Shanghai) Limited
PT4107_DS Rev EN_1.3
WWW.CRPOWTECH.COM
Page 1




Powtech

PT4107 Datasheet Preview

PT4107 Datasheet

Universal High Brightness LED Driver

No Preview Available !

PT4107
Universal High Brightness LED Driver
with Improved Current Regulation and EMI Performance
PIN ASSIGNMENT
PIN DESCRIPTIONS
SOP8
PIN No.
1
2
PIN
NAMES
GND
CS
3 LD
4 RI
5 ROTP
6 PWMD
7 VIN
8 GATE
DESCRIPTION
Device ground
Senses LED string current
Linear dimming by changing the current limit threshold at current
sense comparator
Oscillator frequency control. A resistor connected between this
pin and ground sets the PWM frequency
Temperature sensing input pin. Connected through an NTC
resistor to GND. Once the voltage of the ROTP pin drops below a
pre-defined value, PWM output will be disabled
Low frequency PWM dimming pin, also Enable input. Internal
100kohm pull-up to 5 V
Input Voltage 18V to 450VDC connected by a resistor
Drives the gate of the external MOSFET
ABSOLUTE MAXIMUM RATINGS (Note1)
SYMBOL
VIN
GATE
IVIN(MAX)
PDMAX
PTR1
TJ
TSTG
ITEMS
Supply Voltage
Drives the gate of the external MOSFET
Other pins voltage
Max. Input Current
Power Dissipation (Note 2)
Thermal Resistance, SOP-8 θJA
Operation Junction Temperature Range
Storage Temperature
ESD Susceptibility (Note 3)
VALUE
-0.3~25
-0.3~20
-0.3~6
10
Internally Limited
105
-40 to 125
-55 to 150
2
UNIT
V
V
V
mA
W
/W
kV
China Resources Powtech (Shanghai) Limited
PT4107_DS Rev EN_1.3
WWW.CRPOWTECH.COM
Page 2


Part Number PT4107
Description Universal High Brightness LED Driver
Maker Powtech
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PT4107 Datasheet PDF






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