EVALUATION KIT AVAILABLE MAX16833/MAX16833B/C/D/G High-Voltage HB LED Drivers with Integrated High-Side Current Sense General Description Benefits and Features The MAX16833, MAX16833B, MAX16833C, MAX16833D, Integration Minimizes BOM for High-Brightness LED and MAX16833G are peak current-mode-controlled LED Driver with a Wide Input Range Saving Space and drivers for boost, buck-boost, SEPIC, flyback, and high- Cost side buck topologies. A dimming driver designed to drive +5V to +65V Wide Input Voltage Range with a an external p-channel in series with the LED string pro- Maximum 65V Boost Output Integrated High-Side pMOS Dimming MOSFET vides wide-range dimming control. This feature provides extremely fast PWM current switching to the LEDs with Driver (Allows Single-Wire Connection to LEDs) ICTRL Pin for Analog Dimming no transient overvoltage or undervoltage conditions. In addition to PWM dimming, the ICs provide analog Integrated High-Side Current-Sense Amplifier Full-Scale, High-Side, Current-Sense Voltage of dimming using a DC input at ICTRL. The ICs sense the 200mV LED current at the high side of the LED string. A single resistor from RT/SYNC to ground sets the Simple to Optimize for Efficiency, Board Space, and Input Operating Range switching frequency from 100kHz to 1MHz, while an Boost, SEPIC, and Buck-Boost Single-Channel external clock signal capacitively coupled to RT/SYNC LED Drivers allows the ICs to synchronize to an external clock. In the 2% Accurate 1.64V Reference (MAX16833B/D) MAX16833/C/G, the switching frequency can be dithered Programmable Operating Frequency (100kHz to for spread-spectrum applications. The MAX16833B/D 1MHz) with Synchronization Capability instead provide a 1.64V reference voltage with a 2% Frequency Dithering for Spread-Spectrum tolerance. Applications (MAX16833/C/G) The ICs operate over a wide 5V-to-65V supply range Thermally Enhanced 5mm x 4.4mm, 16-Pin and include a 3A sink/source gate driver for driving a TSSOP Package with Exposed Pad power MOSFET in high-power LED driver applications. Protection Features and Wide Temperature Range Additional features include a fault-indicator output (FLT) Increase System Reliability for short or overtemperature conditions and an overvolt- Short-Circuit, Overvoltage, and Thermal Protection age-protection sense input (OVP) for overvoltage protec- Fault-Indicator Output tion. High-side current sensing combined with a p-channel -40C to +125C Operating Temperature Range 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 Simplified Operating Circuit unique feature of the ICs. 6V TO 18V Applications WITH LOAD DUMP UP Automotive Exterior Lighting: TO 70V High-Beam/Low-Beam/Signal/Position Lights, IN NDRV Daytime Running Lights (DRLs), CS MAX16833 Fog Light and Adaptive Front-Light Assemblies OVP ISENSE+ PWMDIM PWMDIM Commercial, Industrial, and Architectural Lighting ISENSE- DIMOUT Ordering Information appears at end of data sheet. LED+ PGND LED- 19-5187 Rev 15 10/19MAX16833/MAX16833B/C/D/G High-Voltage HB LED Drivers with Integrated High-Side Current Sense Absolute Maximum Ratings IN to PGND .......................................................... -0.3V to +70V Peak Current on NDRV ........................................................ Q3A ISENSE+, ISENSE-, DIMOUT to PGND ............... -0.3V to +80V Continuous Current on NDRV .......................................Q100mA DIMOUT to ISENSE+ ...............................................-9V to +0.3V Short-Circuit Duration on V ...................................Continuous CC ISENSE- to ISENSE+ ...........................................-0.6V to +0.3V Continuous Power Dissipation (T = +70C) A PGND to SGND ....................................................-0.3V to +0.3V 16-Pin TSSOP (derate 26.1mW/C above +70C) .....2089mW V to PGND ..........................................................-0.3V to +9V Operating Temperature Range ....................... -40C to +125C CC NDRV to PGND ........................................ -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C CC OVP, PWMDIM, COMP, LFRAMP, REF, ICTRL, Storage Temperature Range ............................ -65C to +150C RT/SYNC, FLT to SGND...................................-0.3V to +6.0V Lead Temperature (soldering, 10s) .................................+300C CS to PGND .........................................................-0.3V to +6.0V Soldering Temperature (reflow) .......................................+260C Continuous Current on IN ................................................100mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) 16 TSSOP Junction-to-Ambient Thermal Resistance (q )........38.3C/W JA Junction-to-Case Thermal Resistance (q ) .................3C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = 12V, R = 12.4k, C = C = 1F, C /C = 0.1F, NDRV = COMP = DIMOUT = PWMDIM = FLT = unconnected, IN RT IN VCC LFRAMP REF V = V = V = V = 0V, V = V = 45V, V = 1.40V, T = T = -40C to +125C, unless otherwise OVP CS PGND SGND ISENSE+ ISENSE- ICTRL A J noted. Typical values are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SYSTEM SPECIFICATIONS Operational Supply Voltage V 5 65 V IN PWMDIM = 0, no switching 1.5 2.5 Supply Current I mA INQ Switching 2.5 4 UVLOR V rising 4.2 4.55 4.85 IN IN Undervoltage Lockout (UVLO) V UVLOF V falling, I = 35mA 4.05 4.3 4.65 IN IN VCC UVLO Hysteresis 250 mV Startup Delay t During power-up 410 s START DELAY UVLO Falling Delay t During power-down 3.3 s FALL DELAY V LDO REGULATOR CC 0.1mA I 50mA, 9V V 14V VCC IN Regulator Output Voltage V 6.75 6.95 7.15 V CC 14V V 65V, I = 10mA IN VCC Dropout Voltage V I = 50mA, V = 5V 0.15 0.35 V DOVCC VCC IN Short-Circuit Current I V = 0V, V = 5V 55 100 150 mA MAXVCC CC IN OSCILLATOR (RT/SYNC) Switching Frequency Range f 100 1000 kHz SW Bias Voltage at RT/SYNC V 1 V RT V = 0V MAX16833/MAX16833B only 87.5 88.5 89.5 CS Maximum Duty Cycle D % V = 0V MAX16833C/MAX16833D/ MAX CS 93 94 95 MAX16833G only Oscillator Frequency Accuracy -5 +5 % Maxim Integrated 2 www.maximintegrated.com