MAX16832
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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Key Features
Applications/Uses
| VIN (V) (min) | 6.5 |
| VIN (V) (max) | 65 |
| Max. No. of LEDs | 15 |
| # LED Channels | 1 |
| Regulation Topology | Inductor Based |
| LED Configuration | Series |
| ILED per Channel (A) (max) | 1 |
| PWM Dimming Freq. (kHz) (max) | 20 |
| Dimming Ratio (max) | 200 |
| Dimming Control | Analog PWM |
| VDROPOUT (mV) (typ) | 700 |
| VCURR_SENSE (mV) | 170 |
| POUT (W) | 40 |
| ICC (mA) (max) | 1.5 |
| LED String Volt. (V) (max) | 63 |
| Switching Frequency (kHz) | 2000 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 1.46 |
Simplified Block Diagram
Technical Docs
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Sampling:
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Parameters
| VIN (V) (min) | 6.5 |
| VIN (V) (max) | 65 |
| Max. No. of LEDs | 15 |
| # LED Channels | 1 |
| Regulation Topology | Inductor Based |
| LED Configuration | Series |
| ILED per Channel (A) (max) | 1 |
| PWM Dimming Freq. (kHz) (max) | 20 |
| Dimming Ratio (max) | 200 |
| Dimming Control | Analog PWM |
| VDROPOUT (mV) (typ) | 700 |
| VCURR_SENSE (mV) | 170 |
| POUT (W) | 40 |
| ICC (mA) (max) | 1.5 |
| LED String Volt. (V) (max) | 63 |
| Switching Frequency (kHz) | 2000 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 1.46 |
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
Applications/Uses
- Architectural, Industrial, and Ambient Lighting
- Automotive RCL, DRL, and Fog Lights
- Heads-Up Displays
- Indicator and Emergency Lighting
- MR16 and MR111 LED Lights
Description
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.
Technical Docs
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 .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
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