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MAX16823
High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection
Highly Integrated, High-Voltage LED Driver Ideal for Automotive Applications
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The MAX16823 three-channel LED driver operates from a 5.5V to 40V input voltage range and delivers up to 100mA per channel to one or more strings of high-brightness LEDs (HB LEDs). Each channel's current is programmable using an external current-sense resistor in series with the LEDs. Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and off control of the outputs. Wave-shaping circuitry reduces EMI while providing fast turn-on and turn-off times.
The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy. Additional features include an active-high, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x 5mm, 16-pin TQFN-EP and 16-pin TSSOP-EP packages and is specified over the -40°C to +125°C automotive temperature range.
The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy. Additional features include an active-high, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x 5mm, 16-pin TQFN-EP and 16-pin TSSOP-EP packages and is specified over the -40°C to +125°C automotive temperature range.
Key Features
- 5.5V to 40V Operating Range
- Adjustable Constant Output Current (5mA to 100mA and Up to 2A with External BJT)
- ±5% Output Current Accuracy
- Open LED Detection
- Three Independent High-Voltage DIM Inputs
- Three Integrated Pass Elements with Low Dropout Voltage (0.7V max)
- Undervoltage Lockout
- Output Short-Circuit Protection
- 3.4V Voltage Regulator with 4mA Capability
- Accurate, Low 203mV Current Sense
- Overtemperature Shutdown
- -40°C to +125°C Operating Temperature Range
Applications/Uses
- Architecture and Industrial Lighting
- Automotive Exterior: Rear Combination Lights (RCLs), CHMSL
- Automotive Interior: RGB Ambient Lighting, Cluster Lighting, and LCD Backlighting
- Emergency Vehicle Warning Lights
- Navigation and Marine Indicators
Parametric specs for LED Drivers
| VIN (V) (min) | 5.5 |
| VIN (V) (max) | 40 |
| Max. No. of LEDs | 10 |
| # LED Channels | 3 |
| Regulation Topology | Linear |
| LED Configuration | Series-Parallel |
| ILED per Channel (A) (max) | 0.1 |
| PWM Dimming Freq. (kHz) (max) | 3 |
| Dimming Ratio (max) | 200 |
| Dimming Control | PWM |
| VDROPOUT (mV) (typ) | 700 |
| VCURR_SENSE (mV) | 203 |
| POUT (W) | 12 |
| ICC (mA) (max) | 3 |
| LED String Volt. (V) (max) | 39.1 |
| Package/Pins | TQFN/16 TSSOP/16 |
| Budgetary Price (See Notes) | $1.82 @1k |
View More
Technical Docs
| Data Sheet | High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection | Sep 01, 2015 | |
| Reference Schematic | Reference Design for a 3S3P Rear Combination Lamp (RCL) LED Driver |
Click any title below to view the detail page where available.
Description
The MAX16823 evaluation kit (EV kit) circuit demonstrates a current-controlled LED driver that uses the MAX16823 current regulator. The EV kit is configured to supply 50mA to each of the three output channels and the circuit features 3 series LEDs per channel. Output pads are provided at two channels to evaluate external LEDs rated up to 70mA. Additional output pads are available to evaluate LEDs rated up to 550mA (typ) on one of the channels. The MAX16823 EV kit requires a 6.5V to 16V, 1A power supply for proper operation. However, the MAX16823 IC can accept input voltages from 5.5V to 40V.
The MAX16823 EV kit features pulse-width modulation (PWM) dimming-control inputs and an open LED detection output. The MAX16823 EV kit is a fully assembled and tested printed circuit board (PCB).
Features
- 6.5V to 16V Supply Voltage Range
- Open LED Detection Output
- On-Board or External LED Connections
- 50mA Load Current
- Configurable 550mA Output Current at OUT_3
- Separate PWM Dimming Control for Each Channel
- Fully Assembled and Tested
/en/design/design-tools/ee-sim.html?
 | SIMULATION MODELS MAX16823 LED Driver Macromodel | Download |
Support & Training
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Parameters
Parametric specs for LED Drivers
| VIN (V) (min) | 5.5 |
| VIN (V) (max) | 40 |
| Max. No. of LEDs | 10 |
| # LED Channels | 3 |
| Regulation Topology | Linear |
| LED Configuration | Series-Parallel |
| ILED per Channel (A) (max) | 0.1 |
| PWM Dimming Freq. (kHz) (max) | 3 |
| Dimming Ratio (max) | 200 |
| Dimming Control | PWM |
| VDROPOUT (mV) (typ) | 700 |
| VCURR_SENSE (mV) | 203 |
| POUT (W) | 12 |
| ICC (mA) (max) | 3 |
| LED String Volt. (V) (max) | 39.1 |
| Package/Pins | TQFN/16 TSSOP/16 |
| Budgetary Price (See Notes) | $1.82 @1k |
Key Features
- 5.5V to 40V Operating Range
- Adjustable Constant Output Current (5mA to 100mA and Up to 2A with External BJT)
- ±5% Output Current Accuracy
- Open LED Detection
- Three Independent High-Voltage DIM Inputs
- Three Integrated Pass Elements with Low Dropout Voltage (0.7V max)
- Undervoltage Lockout
- Output Short-Circuit Protection
- 3.4V Voltage Regulator with 4mA Capability
- Accurate, Low 203mV Current Sense
- Overtemperature Shutdown
- -40°C to +125°C Operating Temperature Range
Applications/Uses
- Architecture and Industrial Lighting
- Automotive Exterior: Rear Combination Lights (RCLs), CHMSL
- Automotive Interior: RGB Ambient Lighting, Cluster Lighting, and LCD Backlighting
- Emergency Vehicle Warning Lights
- Navigation and Marine Indicators
Description
The MAX16823 three-channel LED driver operates from a 5.5V to 40V input voltage range and delivers up to 100mA per channel to one or more strings of high-brightness LEDs (HB LEDs). Each channel's current is programmable using an external current-sense resistor in series with the LEDs. Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and off control of the outputs. Wave-shaping circuitry reduces EMI while providing fast turn-on and turn-off times.
The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy. Additional features include an active-high, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x 5mm, 16-pin TQFN-EP and 16-pin TSSOP-EP packages and is specified over the -40°C to +125°C automotive temperature range.
The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy. Additional features include an active-high, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x 5mm, 16-pin TQFN-EP and 16-pin TSSOP-EP packages and is specified over the -40°C to +125°C automotive temperature range.
Technical Docs
| Data Sheet | High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection | Sep 01, 2015 | |
| Reference Schematic | Reference Design for a 3S3P Rear Combination Lamp (RCL) LED Driver |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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