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

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

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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.
MAX16832A, MAX16832C: Typical Application Circuit MAX16832A, MAX16832C: Typical Application Circuit Enlarge+

Key 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


  • Architectural, Industrial, and Ambient Lighting
  • Automotive RCL, DRL, and Fog Lights
  • Heads-Up Displays
  • Indicator and Emergency Lighting
  • MR16 and MR111 LED Lights

See parametric specs for LED Drivers (81)

Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
PWM Dimming Freq.
Dimming RatioDimming ControlVDROPOUT
LED String Volt.
Oper. Freq.
maxmaxmaxtypminmaxmaxmaxSee Notes
MAX16832 Inductor Based151Series120200
SOIC (N)/8
$1.25 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX16832CEVKIT: Evaluation Kit for the MAX16832C and MAX16832A
Request Reliability Report for: MAX16832 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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