Tindie

Name: High-Power RGB-LED Driver V1.3X
SKU: 11343
Price: 50.00 USD
Availability: InStock

High-Power RGB-LED Driver V1.3X

LM3404 based high-power RGB-LED driver board

Designed by Quantum Frame, Ships from Hungary

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Power input: 36VDC @ 4A
Reverse polarity protection on power input connector
Forward voltage on each channel: 22 ‒ 34V (automatically adjusted)
Forward current on each channel: 0.9A (set by a resistor)
Enable/disable LM3404 drivers
PWM color dimming on each channel
+5V power supply for external microcontroller
+12V power supply for cooling fan
Selectable fan configuration (2/3/4-pin)
PWM fan control
RPM signal output from fan (3/4-pin only)
LM35 temperature sensor connectivity
Can be controlled with any PWM-capable 5V/3.3V microcontroller (Arduino / Raspberry Pi / ESP32)

Power input (J1): reverse polarity protected screw terminal
LED red-channel output (J2): screw terminal
LED green-channel output (J3): screw terminal
LED blue-channel output (J4): screw terminal
Cooling fan output (J5): standard +12V 3/4-pin fan connector
- -: ground
- +: +12V
- S: sense (RPM)
- C: control (PWM)
Fan pin-selector (J6): a jumper here routes the F-PWM signal
- 4P & x: 4-pin fan
- 2P/3P & x: 2/3-pin fan
+5V output (J7): standard 2.54 mm pin header to power external microcontroller
Control pins (J8): standard 2.54 mm pin header
- EN: pull this pin low to enable all LM3404 drivers or use a jumper to connect with the ground pin above it
- RED: logic level PWM-signal (3.3V or 5V) to the red-channel
- GREEN: logic level PWM-signal (3.3V or 5V) to the green-channel
- BLUE: logic level PWM-signal (3.3V or 5V) to the blue-channel
- F-PWM: logic level PWM-signal (3.3V or 5V) to the cooling fan for RPM control, no signal here means 100% RPM
- F-RPM: fan RPM feedback (5V logic, not safe for 3.3V devices, two pulses per rotation, 3/4-pin fans only)
- TEMP: analog signal routed from J9 (3.3V safe)
LM35 temperature sensor (J9): if you want to measure heat sink temperature
- + : +5V
- T : analog signal (0 ‒ 1V)
- ‒ : ground

Don't hotswap on the J1-J4 connectors! Power down the system before you connect/disconnect high-current wires.
Pull EN pin low externally or put a jumper on it to enable all LM3404 drivers. This pin is a simple ON/OFF switch, don't PWM it!
Apply logic level PWM signal (3.3V or 5V, 100-2000 Hz) to RED, GREEN and BLUE pins to display colors and change brightness. If no control signal is present the RGB-LED won't turn on.
Apply logic level PWM signal (3.3V or 5V, 100-2000 Hz) to F-PWM pin to control the cooling fan RPM. Leave this pin disconnected if you want 100% RPM by default. Make sure to put the jumper in the right place on the J6 connector!
Read F-RPM pin to verify cooling fan RPM. This only works with 3/4-pin fans. Leave this pin disconnected if not used. This signal is NOT 3.3V safe (two 5V pulses every rotation).
Read TEMP pin to get LM35 temperature sensor analog value (ideally mounted on the heat sink). Voltage/temperature conversion: 0mV = 0°C, 250mV = 25°C, 618mV = 61.8°C (10mV/°C). Leave this pin disconnected if not used. The analog signal is 3.3V safe (0-1V).