MAX16822B
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MAX16822B

2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense

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High-Voltage, High-Efficiency LED Drivers with Integrated MOSFET Save Space and Cost

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1ku List Price Starting From $1.51
Features
  • Cost-Effective Solution for Wide Range of LED Lighting Applications
    • 6.5V to 65V Input Voltage Range
    • Output Current Up to 500mA
    • ±3% LED Current Accuracy
    • Selectable Dimming Options: Linear or PWM
  • Minimal Component Count Saves Cost and Space
    • On-Board 65V, 0.85Ω Power MOSFET
    • Resistor-Programmable Constant LED Current
    • Integrated High-Side Current Sense with 200mV Current-Sense Reference
    • Hysteretic Control: Up to 2MHz Switching Frequency
  • Protection Features and Wide Operating Temperature Range Improves Reliability
    • Thermal-Foldback Protection Dims LEDs to Minimize Overheating
    • Thermal-Shutdown Protection
    • Available in an 8-Pin SO Package
    • Operation Over -40°C to +125°C Temperature Range
Additional Details
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The MAX16822A/MAX16822B step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective design solution for automotive interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other LED illumination applications.

The MAX16822A/MAX16822B operate from a +6.5V to +65V input-voltage range and can provide an output current up to 350mA, if operated up to a temperature of +125°C, or up to 500mA, if operated up to a temperature of +105°C. A high-side current-sense resistor adjusts the output current and a dedicated pulse-width modulation (PWM) input enables pulsed LED dimming over a wide range of brightness levels.

These devices are well suited for applications requiring a wide input-voltage range. The high-side current sensing and an integrated current-setting circuitry minimize the number of external components while delivering an average output current with ±3% accuracy. A hysteretic control method ensures excellent input supply rejection and fast response during load transients and PWM dimming. The MAX16822A allows 10% current ripple and the MAX16822B allows 30% current ripple. Both devices operate up to a switching frequency of 2MHz, thus allowing the use of small-sized components.

The MAX16822A/MAX16822B offer an analog dimming feature that reduces the output current by applying an external DC voltage below the internal 2V threshold voltage from TEMP_I to GND. TEMP_I also sources 25µA to a negative temperature coefficient (NTC) thermistor connected between TEMP_I and GND, thus providing an analog thermal-foldback feature that reduces the LED current when the temperature of the LED string exceeds a specified temperature point.

An additional feature includes thermal-shutdown protection that turns off the LX driver when the junction temperature exceeds +165°C.

The MAX16822A/MAX16822B operate over the -40°C to +125°C automotive temperature range and are available in an 8-pin SO package.

Applications

  • Architectural, Industrial, and Ambient Lighting
  • Automotive RCL, DRL, and Fog Lights
  • Heads-Up Displays
  • Indicator and Emergency Lighting
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1ku List Price Starting From $1.51
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MAX16822B

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Data Sheet

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UPDATED 02/24/2015
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MAX16822A-MAX16822B: 2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense Data Sheet (Rev.4)

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UPDATED 07/23/2010
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MAX16822-MAX16822B_cn: 2MHz、高亮度LED驱动器，集成MOSFET和高边电流检测 Data Sheet (Rev.3)

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Reliability Data

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UPDATED 01/12/2023
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MAX16822B Reliability Data redirect icon

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UPDATED 11/15/2016
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Transform a LED Driver from Buck to Boost for Enhanced Flexibility, Reduced BOM redirect icon

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UPDATED 03/04/2009
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Selecting HB LED Drivers for Automotive Lighting Applications redirect icon

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UPDATED 06/09/2009
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为汽车照明应用选择HB LED驱动器 redirect icon

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UPDATED 07/21/2009
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車載用照明アプリケーション向けHB (高輝度) LEDドライバの選択 redirect icon

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UPDATED 10/13/2009
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Logic-Level Signals Dim -48V LED Driver redirect icon

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Documentation

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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MAX16822BASA+T Small-Outline IC, Narrow (0.15in) external-link
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Oct 30, 2020

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MAX16822BASA+

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Software & Part Ecosystem

Evaluation Kits 1

MAX16822BEVKIT

Evaluation Kit for the MAX16822B

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MAX16822BEVKIT

Evaluation Kit for the MAX16822B

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MAX16822BEVKIT
Evaluation Kit for the MAX16822B

Features and Benefits

  • 6V to 65V Wide Supply Voltage Range
  • 333mA LED Current
  • Digital PWM Dimming Control
  • Analog Dimming Control
  • Thermal Foldback and Temperature Simulation Circuit
  • Evaluates MAX16822A (IC Replacement Required)
  • Fully Assembled and Tested
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Product Detail

The MAX16822B evaluation kit (EV kit) demonstrates the MAX16822B hysteretic current-mode high-brightness LED (HB LED) driver IC. The MAX16822B EV kit is configured as a step-down topology with a constant-current HB LED driver circuit for external HB LEDs. The MAX16822B EV kit operates from a DC supply voltage of 6V to 65V and is configured to deliver up to 350mA of current to user-supplied HB LEDs. The output voltage for the HB LED string can go up to 64V and depends upon the EV kit's input voltage.

The MAX16822B EV kit can be configured for digital pulse-width modulation (PWM) dimming operation using a digital PWM input signal to control the HB LEDs' brightness. The MAX16822B has an undervoltage lockout (UVLO) feature that disables the EV kit at low input voltage. The EV kit circuit also features a thermal foldback and temperature simulation circuit feature. The MAX16822B EV kit is a fully assembled and tested surface-mount board. The MAX16822B EV kit can also evaluate the MAX16822A, or for higher currents, a MAX16832 IC.

Warning: Voltages exceeding 42V may exist on the LED+ and LED- output pads.

Applications

  • Architectural, Industrial, and Ambient Lighting
  • Automotive RCL, DRL, and Fog Lights
  • Heads-Up Displays
  • Indicator and Emergency Lighting

Evaluation Kits1

MAX16822BEVKIT

Evaluation Kit for the MAX16822B

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