Code Mercenaries LED-Warrior01 User manual
Code Mercenaries
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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
Code Mercenaries
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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
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LED1
LEDn
GND
Vin
LEDk
MOD
LEDa
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LED1
LEDn
100kΩ
GND
Vin
LEDk
MOD
LEDa
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LED1
LEDn
100kΩ
Rx
V1.0.1 September 11th 2008
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