High-Power RGB-LED Driver

Name: High-Power RGB-LED Driver
SKU: 11343
Price: 50.00 USD
Availability: InStock

LM3404/BP1808 based high-power RGB-LED driver board

Designed by Boundary Condition in Hungary

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LM3404/BP1808 based high-power RGB-LED driver board

I present to you an LM3404 (V1) / BP1808 (V2) based high-power RGB-LED controller that can drive a single 100W RGB-LED chip. Two on-board voltage regulators can supply +5V and +12V for an external mi…

Current hardware version: V2.0.0

Features

Power input: 40VDC @ 4A (36V is sufficient too)
Reverse polarity protection on power input connector
Forward voltage on each channel: 22 ‒ 36V (automatically adjusted)
Forward current on each channel: 0.9A (set by a resistor)
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)
V1.3X: LM35 temperature sensor connectivity
V1.4X and V2: 10kΩ NTC thermistor temperature sensor (onboard, external)
Can be controlled with any PWM-capable 5V microcontroller (Arduino)
Color dimming pins are safe to drive with 3.3V microcontrollers (ESP32 / Raspberry Pi)
Not suitable for common anode/cathode LEDs! Separate common pin with a wire cutter to 3 individual pins to get 6 pins in total.

Additional features for V2

Screw terminals replaced with spring clamp terminals (17-22 AWG or max 1 mm^2 wiring)
Optional pads for heatsinks (included)
Selectable forward current on each channel: 0.32-1.90A
Analog flicker-free color dimming on each channel

See tables in datasheet for more detail.

Connector description (V1.3X)

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 (5V only, not safe for 3.3V devices) 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, 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

Connector description (V1.4X)

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
- GND: ground
- +12V: +12V
- RPM: RPM-signal
- PWM: PWM-control (4-pin fan only)
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
- DIMR: logic level PWM-signal (3.3V or 5V) to the red-channel
- DIMG: logic level PWM-signal (3.3V or 5V) to the green-channel
- DIMB: logic level PWM-signal (3.3V or 5V) to the blue-channel
- FANPWM: logic level PWM-signal (5V only, not safe for 3.3V devices) to the cooling fan for RPM control, no signal here means 100% RPM
- FANRPM: fan RPM feedback (5V logic, not safe for 3.3V devices, 3/4-pin fans only)
- INTTEMP: voltage divider output of the onboard NTC thermistor
- EXTTEMP: voltage divider output of an externally connected NTC thermistor (to measure heatsink temperature)

Connector description (V2)

Power input (J1): reverse polarity protected spring-loaded terminal
LED red-channel output (J2): spring-loaded terminal
LED green-channel output (J3): spring-loaded terminal
LED blue-channel output (J4): spring-loaded terminal
Cooling fan output (J5): standard +12V 3/4-pin fan connector
- GND: ground
- +12V: +12V
- RPM: RPM-signal
- PWM: PWM-control (4-pin fan only)
Control pins (J6):
- +VL: logic voltage output (selectable 3.3V or 5V)
- GND: ground
- DIMR: logic level PWM-signal (3.3V or 5V) to the red-channel
- DIMG: logic level PWM-signal (3.3V or 5V) to the green-channel
- DIMB: logic level PWM-signal (3.3V or 5V) to the blue-channel
- TEXT: voltage divider output of an externally connected NTC thermistor temperature output (to measure heatsink temperature)
- NTC1: external thermistor pin 1
- NTC2: external thermistor pin 2
- TINT: voltage divider output of the onboard NTC thermistor
- FANRPM: fan RPM feedback (pulled up to +VL)
- FANPWM: logic level PWM-signal to the cooling fan for RPM control, no signal here means 100% RPM
- 2P/3P & x: 2/3-pin fan select
- 4P & x: 4-pin fan select

Operation

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/DIMR, GREEN/DIMG and BLUE/DIMB 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 (5V only, 100-2000 Hz) to F-PWM/FANPWM 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/FANRPM 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 safe for 3.3V devices.
Read TEMP/INTTEMP/EXTTEMP pin to get temperature reading. LM35 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).