MAX16832
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MAX16832

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

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $1.72
Features
  • Cost-Effective Solution for a Wide Range of LED Lighting Applications
    • 6.5V to 65V Input Voltage Range
    • Output Current Up to 1A
    • ±3% LED Current Accuracy
    • Selectable Dimming Options: Linear or PWM
  • Minimal Component Count Saves Cost and Space
    • On-Board 65V, 0.45Ω 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 Lighting Fixture Reliability
    • Thermal-Foldback Protection Dims LEDs to Minimize Overheating
    • Thermal-Shutdown Protection
    • Available in a Thermally Enhanced 8-Pin SO Package
    • Operation over -40°C to +125°C Temperature Range
Additional Details
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The MAX16832A/MAX16832C 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 MAX16832A/MAX16832C operate from a +6.5V to +65V input voltage range and can provide an output current up to 700mA, if operated up to a temperature of +125°C, or up to a 1A 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 MAX16832A allows 10% current ripple, and the MAX16832C allows 30% current ripple. Both devices operate up to a 2MHz switching frequency, thus allowing the use of small-sized components.

The MAX16832A/MAX16832C 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. Additional features include thermal-shutdown protection.

The MAX16832A/MAX16832C operate over the -40°C to +125°C automotive temperature range and are available in a thermally enhanced 8-pin SO package.

Applications

  • Architectural, Industrial, and Ambient Lighting
  • Automotive RCL, DRL, and Fog Lights
  • Heads-Up Displays
  • Indicator and Emergency Lighting
  • MR16 and MR111 LED Lights
Part Models 6
1ku List Price Starting From $1.72

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX16832AASA+
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MAX16832AASA+T
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MAX16832AASA/V+
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MAX16832AASA/V+T
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MAX16832CASA+
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MAX16832CASA+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX16832CEVKIT

Evaluation Kit for the MAX16832C and MAX16832A

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MAX16832CEVKIT

Evaluation Kit for the MAX16832C and MAX16832A

Evaluation Kit for the MAX16832C and MAX16832A

Features and Benefits

  • 6.5V to 65V Wide Supply Voltage Range
  • 666mA HB LED Current
  • Digital PWM Dimming Control
  • Analog Dimming Control
  • Thermal-Foldback and Temperature-Simulation Circuit
  • Demonstrates a Thermally Optimized PCB Layout Design
  • Evaluates MAX16832A (IC Replacement Required)
  • Lead-Free and RoHS Compliant
  • Fully Assembled and Tested

Product Detail

The MAX16832C evaluation kit (EV kit) demonstrates the MAX16832C hysteretic current-mode high-brightness LED (HB LED) driver IC. The MAX16832C EV kit is configured as a step-down topology with a constant-current HB LED driver circuit for external HB LEDs. The MAX16832C EV kit operates from a DC supply voltage of 6.5V to 65V and is configured to deliver 666mA 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 MAX16832C EV kit can be configured for digital pulse-width modulation (PWM) dimming operation using a digital PWM input signal. The EV kit circuit also features a thermal-foldback and temperature-simulation circuit feature. The MAX16832C EV kit is a fully assembled and tested surface-mount board. Additionally, the PCB layout design has been maximized for optimum thermal dissipation. The MAX16832C EV kit can also evaluate a MAX16832A after replacing the IC, which can be ordered from the number listed in the full data sheet.

Warning: Voltages exceeding 42V could 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
  • MR16 and MR111 LED Lights

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