MAX16833CAUE Datasheet

LED Lighting Drivers


The MAX16833/MAX16833B–MAX16833D( MAX16833CAUE ) are peak current-mode-controlled LED drivers for boost, buckboost, SEPIC, flyback, and high-side buck topologies. A dimming driver designed to drive an external p-channel in series with the LED string provides wide-range dimming control. This feature provides extremely fast PWM current switching to the LEDs with no transient overvoltage or undervoltage conditions. In addition to PWM dimming, the ICs provide analog dimming using a DC input at ICTRL. The ICs sense the LED current at the high side of the LED string.A single resistor from RT/SYNC to ground sets the switching frequency from 100kHz to 1MHz, while an external clock signal capacitively coupled to RT/SYNC allows the ICs to synchronize to an external clock. In the MAX16833/MAX16833C, the switching frequency can be dithered for spread-spectrum applications. The MAX16833B/MAX16833D instead provide a 1.64V reference voltage with a 2% tolerance. The ICs operate over a wide 5V to 65V supply range and include a 3A sink/source gate driver for driving a power MOSFET in high-power LED driver applications. Additional features include a fault-indicator output (FLT) for short or overtemperature conditions and an overvoltage-protection sense input (OVP) for overvoltage protection. High-side current sensing combined with a p-channel dimming MOSFET allow the positive terminal of the LED string to be shorted to the positive input terminal or to the negative input terminal without any damage. This is a unique feature of the ICs. MAX16833CAUE Features • Boost, SEPIC, and Buck-Boost Single-Channel LED Drivers• +5V to +65V Wide Input Voltage Range with a Maximum 65V Boost Output• Integrated High-Side Current-Sense Amplifier• ICTRL Pin for Analog Dimming• Integrated High-Side pMOS Dimming MOSFET Driver (Allows Single-Wire Connection to LEDs)• Programmable Operating Frequency (100kHz to 1MHz) with Synchronization Capability• Frequency Dithering for Spread-Spectrum Applications (MAX16833/MAX16833C)• 2% Accurate 1.64V Reference (MAX16833B/MAX16833D)• Full-Scale, High-Side, Current-Sense Voltage of 200mV• Short-Circuit, Overvoltage, and Thermal Protection• Fault Indicator Output


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Manufacturer information


Electrification, automation and digitalization are the long-term growth fields of Siemens. In order to take full advantage of the market potential in these fields, our businesses are bundled into eight divisions and Siemens Healthineers as well as Siemens Wind Power as a separately managed businesses.

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