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PT4115 Datasheet

1.2A Step-down High Brightness LED Driver

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PT4115
30V, 1.2A Step-down High Brightness
LED Driver with 5000:1 Dimming
GENERAL DESCRIPTION
The PT4115 is a continuous conduction mode inductive
step-down converter, designed for driving single or
multiple series connected LED efficiently from a
voltage source higher than the total LED chain voltage.
The device operates from an input supply between 6V
and 30V and provides an externally adjustable output
current of up to 1.2A. Depending upon the supply
voltage and external components, the PT4115can
provide more than 30 watts of output power.
The PT4115 includes the power switch and a high-side
output current sensing circuit, which uses an external
resistor to set the nominal average output current, and a
dedicated DIM input accepts either a DC voltage or a
wide range of pulsed dimming. Applying a voltage of
0.3V or lower to the DIM pin turns the output off and
switches the device into a low current standby state.
The PT4115 is available in SOT89-5 and ESOP8
packages.
FEATURES
Simple low parts count
Wide input voltage range: 6V to 30V
Up to 1.2A output current
Single pin on/off and brightness control using DC
voltage or PWM
Up to 1MHz switching frequency
Typical 5% output current accuracy
Inherent open-circuit LED protection
High efficiency (up to 97%)
High-Side Current Sense
Hysteretic Control: No Compensation
Adjustable Constant LED Current
ESOP8 package for large output power application
RoHS compliant
APPLICATIONS
Low voltage halogen replacement LEDs
Automotive lighting
Low voltage industrial lighting
LED back-up lighting
Illuminated signs
SELV lighting
LCD TV backlighting
ORDERING INFORMATION
PACKAGE
SOT89-5
TEMPERATURE
RANGE
-40 oC to 85 oC
ORDERING PART
NUMBER
PT4115B89E:A type
PT4115B89E-B:B type
ESOP8
-40 oC to 85 oC
PT4115BSOH:A type
PT4115BSOH-B:B type
Note:
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
1000 units
Tape and Reel
2500 units
MARKING
PT4115
xxxxxX
PT4115
xxxxxX
TYPICAL APPLICATION CIRCUIT
DC6-30V
VIN
AC12-18V
CIN 100uF
RS
0.13Ω
D
LED
3W
L
68uH
VIN CSN SW
DIM PT4115
GND
China Resources Powtech (Shanghai) Limited
PT4115_DS Rev EN_2.9
WWW.CRPOWTECH.COM
Page 1
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PowTech

PT4115 Datasheet Preview

PT4115 Datasheet

1.2A Step-down High Brightness LED Driver

No Preview Available !

PIN ASSIGNMENT
PT4115
30V, 1.2A Step-down High Brightness
LED Driver with 5000:1 Dimming
CSN
VIN
SW
NC
1 8 DIM
2 7 GNDA
3 6 GNDP
4 5 NC
ESOP8
PIN DESCRIPTIONS
PIN No.
1
2
3
4
5
-
ESOP8 4,5
PIN
NAMES
SW
GND
DIM
CSN
VIN
Exposed PAD
NC
DESCRIPTION
Switch Output. SW is the drain of the internal N-Ch MOSFET switch.
Signal and power ground. Connect directly to ground plane.
Logic level dimming input. Drive DIM low to turn off the current regulator.
Drive DIM high to enable the current regulator.
Current sense input
Input Supply Pin. Must be locally bypassed.
Internally connected to GND. Mount on board for lower thermal resistance.
No connection
ABSOLUTE MAXIMUM RATINGS (note1)
SYMBOL
VIN
SW
CSN
DIM
ISW
PDMAX
PTR
PTR
TJ
TSTG
ITEMS
Supply Voltage
Drain of the internal power switch
Current sense input (Respect to VIN)
Logic level dimming input
Switch output current
Power Dissipation (Note 2)
Thermal Resistance, SOT89-5
θJA
Thermal Resistance, ESOP8 θJA
Operation Junction Temperature Range
Storage Temperature
ESD Susceptibility (Note 3)
VALUE
-0.3~45
-0.3~45
+0.3~(-6.0)
-0.3~6
1.5
1.5
45
40
-40 to 150
-55 to 150
2
UNIT
V
V
V
V
A
W
oC /W
oC /W
oC
oC
kV
China Resources Powtech (Shanghai) Limited
PT4115_DS Rev EN_2.9
WWW.CRPOWTECH.COM
Page 2


Part Number PT4115
Description 1.2A Step-down High Brightness LED Driver
Maker PowTech
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PT4115 Datasheet PDF






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