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1. Features
• Input voltage 7 - 30V
• Constant current output, 350mA, 700mA, 1A
• Maximum output power 24W
• 1A max output
• Capable of driving 1..7 white LEDs
• Input transients up to 40V <0.5s
• Up to 95% efficiency
• PWM or analog control input for dimming
• Standby current max. 40μA
• Optimized for point-of-load regulation
1.1 Variants
LED-Warrior01 is available in variants for 350mA,
700mA and 1A output current.
1.2 Custom variants
Custom output current versions are available on
request. Minimum order quantities may apply.
2. Functional overview
LED-Warrior01 is a point-of-load regulator for
LED lighting applications. By providing a highly
efficient constant current regulation off a DC
source LED-Warrior01 is perfectly suited for
applications that require low DC levels for safety
reasons, driving multiple LED groups in one
luminaire, mobile or in-vehicle lighting, and to
refit existing low voltage halogen installations.
3. Mechanical dimensions and connections
Dimensions in mm
Height at thickest point: 7mm
Mounting holes are 2.5mm in diameter.
Solder pad holes are 0.9mm in diameter.
Tolerances:
Hole diameters: -0.05 / +0.1mm
Hole positions: ±0.05mm
Outer contour: ±0.2mm
When mounting the module make sure to use
insulating washers or use screw heads that are
small enough to avoid contact to the surrounding
PCB traces and components. When mounting on a
conductive surface make sure to add spacers or an
insulating layer under the module to avoind short
circuits
21,0
25,0
Vin
GND
LEDa
MOD
LEDk
3,3
18,6
3,3
17,7
V1.0.1 September 11th 2008
HB LED driver module for low
voltage input
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3.1 Pin Descriptions
Vin
Supply voltage positive input. Apply a DC voltage
of 7V to 30V here.
GND
Supply voltage negative input and ground
reference for MOD input.
LEDa
Positive output for LED, connect the anode of the
first LED of the string to this pin.
LEDk
Negative output for LED, connect the cathode of
the last LED of the string to this pin. This pin is not
identical to GND!
MOD
Modulation and dimming input. Can be used for
analog or PWM dimming (see section 5 for
detailed description). Pulling this pin low disables
the LED output and puts the LED-Warrior01 into a
standby mode. This pin can be left unconnected if
no brightness control is required.
4. Connecting the LEDs
The maximum number of LEDs that can be driven
by LED-Warrior01 depends on the supply voltage
and the combined forward voltage of the LEDs.
Input voltage needs to be about 2V higher than the
total forward voltage of the LED string for proper
operation.
4.1 Reducing output ripple
To reduce output ripple and possibly prevent EMC
problem when the LEDs are mounted not
immediately adjacent to the regulator a capacitor
may be put parallel to the LEDs, preferable
connected direct between LEDa and LEDk of the
LED-Warrior01.
5. Brightness control
The MOD input allows analog or PWM brightness
control of the LEDs.
By applying a 0.3V-2.5V level to the MOD input
the output current can be controlled between 25%
to 200% of the nominal value. Though driving the
current over 100% is to be used very cautiously as
this can exceed the maximum current for the
regulator.
For simple dimming a 100kΩ potentiometer
connecting between MOD and GND is
recommended:
Setting the output current to values above the
100% setting requires either a 2.5V voltage
reference or a voltage divider in the correct relation
to your supply voltage:
Rx = (Vin/2.5) * 100,000
Dimming from 1% to 100% brightness is possible
with an open collector or open drain PWM signal
up to 1kHz connected to MOD.
Example circuit for reducing output current by
PWM:
GND
Vin
LEDk
MOD
LEDa
LLLLWWWW000011
11
LED1
LEDn
GND
Vin
LEDk
MOD
LEDa
LLLLWWWW000011
11
LED1
LEDn
100kΩ
GND
Vin
LEDk
MOD
LEDa
LLLLWWWW000011
11
LED1
LEDn
100kΩ
Rx
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PWM frequencies significantly higher than 1kHz
will be turned into analog dimming signals by the
input low pass filter of LED-Warrior01.
6. Regulator efficiency
The regulator efficieny depends on a number of
parameters. Since there are a couple constant
losses independent of the total power delivered by
the regulator the basic rule is that the regulator is
more efficient when used at higher power (i.e.
more LEDs connected). A lower difference
between input and output voltage does also
increase the efficiency.
GND
Vin
LEDk
MOD
LEDa
LLLLWWWW000011
11
LED1
LEDn
4K7
PWM in
0 10 20 30
Input Voltage (V)
70
75
80
85
90
95
100
Efficiency (%)
1 LED
3 LED
7 LED
5LED
Efficiency LW01-350
0 10 20 30
Input Voltage (V)
70
75
80
85
90
95
100
Efficiency (%)
1 LED
7 LED
5LED
3 LED
Efficiency LW01-700
0 10 20 30
Input Voltage (V)
70
75
80
85
90
95
100
Efficiency (%)
3 LED
1 LED
5LED
7 LED
Efficiency LW01-1000
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6.1 Output current
The output current varies somewhat depending on
the forward voltage of LEDs and the input voltage.
If a more precise output current is required it can
be set by using the MOD input.
6.2 Reliability
The reliability data is based on data provided by
component manufacturers:
Failure Rate (FIT): 55 * 10
-9h-1
Mean Time to Failure (MTTF): 1,8 * 107h
7. FCC / CE
The LED-Warrior01 is sold as a module to be
integrated into a device. As such it can not be FCC
or CE approved.
Code Mercenaries has excerted greatest care in
designing this module to minimize RF emission
and assure safe and stable operation. Though the
use of proper cable materials and correct
integration into a device is crucial to assure
product safety and interference free operation.
The integrator who assembles the module into a
device has to take care for appropriate construction
and testing.
10 20 30
Input Voltage (V)
0,3
0,32
0,34
0,36
0,38
0,4
0,42
LED Current (A)
1 LED
7 LED
3 LED
5 LED
Output Current LW01-350
10 20 30
Input Voltage (V)
0,66
0,68
0,7
0,72
0,74
0,76
LED Current (A)
7 LED
5 LED
1 LED
3 LED
Output Current LW01-700
10 20 30
Input Voltage (V)
0,9
0,92
0,94
0,96
0,98
1
1,02
1,04
LED Current (A)
3 LED
5 LED
1 LED
7 LED
Output Current LW01-1000
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8. Absolute maximum ratings
Input Voltage (Vin relative to GND): -0.3V to +30V (40V for 0.5sec)
MOD pin input voltage (realtive to GND): -0.3V to +6V
Input Current: 1.25A
Operating temperature:
LW01-350: -30°C to +85°C in still air
LW01-700: -30°C to +85°C in still air
LW01-1000: -30°C to +65°C in still air
Absolute maximum ratings must not be exceeded or permanent damage to the LED-Warrior01 may
result.
8.1 Thermal precautions
When operating at elevated ambient temperature,
vertical mounting in an air volume sufficiently
large to allow convection is recommended to
reduce surface temperature of the regulator.
Additional cooling measures can help to further
reduce the regulator temperature and increase long
term reliability.
No part of the module surface may exceed 125°C
during operation at any time.
8.2 Electrical Characteristics
Input Voltage (Vin): 7V to 30V
Standby current (MOD grounded): 20μA to 40μA
Output current (tested parameter):
LW01-350: 348mA ±20%
LW01-700: 699mA ±10%
LW01-1000: 1000mA ±10%
8.3 Failure modes
The most common failure mode seen when the
regulator is destroyed due to overtemperature or
overcurrent is a short circuit between Vin and
GND.
Overvoltage typically also leads to a short circuit
between Vin and GND, additionally the LEDs can
be exposed to overvoltage in this case.
8.4 Recommended safety measures
An appropriate fuse or other current limiting
measure in the power supply is required to prevent
fire hazards in case of malfunctions.
Materials with low flash points must be kept away
from the regulator. The surface temperature of
parts of the regulator may reach up to 125°C
surface temperature when used at elevated ambient
temperatures and maximum power.
V1.0.1 September 11th 2008
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9. Ordering information
The modules listed here are standard products.
Customized modules are available on request.
9.1 Packaging info
The modules are packaged in boxes of 30 units
each.
9.2 Identifying current values
LED-Warrior01 modules are marked with a color
dot to identify the current value of the module. The
color dot also serves to identify that the module has
been tested and is OK.
The color dot can be found on the coil of the
module. Color codings are in the ordering
information table.
Legal Stuff
This document is ©1999-2008 by Code
Mercenaries.
The information contained herein is subject to
change without notice. Code Mercenaries makes
no claims as to the completeness or correctness of
the information contained in this document.
Code Mercenaries assumes no responsibility for
the use of any circuitry other than circuitry
embodied in a Code Mercenaries product. Nor
does it convey or imply any license under patent or
other rights.
Code Mercenaries products may not be used in any
medical apparatus or other technical products that
are critical for the functioning of lifesaving or
supporting systems. We define these systems as
such that in the case of failure may lead to the
death or injury of a person. Incorporation in such a
system requires the explicit written permission of
the president of Code Mercenaries.
Trademarks used in this document are properties of
their respective owners.
Code Mercenaries
Hard- und Software GmbH
Karl-Marx-Str. 147a
12529 Schönefeld OT Grossziethen
Germany
Tel: x49-3379-20509-20
Fax: x49-3379-20509-30
Mail: support@codemercs.com
Web: www.codemercs.com
HRB 9868 CB
Geschäftsführer: Guido Körber, Christian Lucht
V1.0.1 September 11th 2008
Partname Description Color code Description
LED-Warrior01-350
LED-Warrior01-700
LW01-350
LW01-700
Orange
Violet
HB LED supply module for 350mA
HB LED supply module for 700mA
LED-Warrior01-1000 LW01-1000 Brown HB LED supply module for 1000mA
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