EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX20096/MAX20097 Dual-Channel Synchronous Buck, High-Brightness LED Controller with and without SPI Interface General Description Benefits and Features The MAX20096/MAX20097 are dual-channel, high- Integration Minimizes BOM for High-Brightness LED voltage, synchronous n-channel high-current buck LED Driver, Saving Space and Cost drivers. The ICs use a proprietary average current-mode- Wide 4.5V to 65V Input Voltage Range control scheme to regulate the inductor current. This No Compensation Components control method does not require any control-loop compen- Programmable Switching Frequency sation, maintaining nearly constant switching frequency. External MOSFETs that are Sizable for the Inductor current sense is achieved by sensing the current Appropriate Current in the bottom switching device. The ICs integrate two fully Wide Dimming Ratio Allows High-Contrast Ratio synchronous buck-converter controllers, and operate over Analog Dimming a wide 4.5V to 65V input range. The ICs are designed for PWM Dimming high-frequency operation and can operate at switching Suitable for Matrix Lighting frequencies as high as 1MHz. Maintains Current Regulation While Shorting/ In the MAX20096, the output voltages and currents on Opening Individual LEDs in the String both channels and the junction temperature can be read Ultra-Fast Response Control Loop Prevents back through the SPI interface. Protection features include Overshoots and Undershoots inductor current-limit protection, overvoltage protection, Protection Features and Wide Temperature Range and thermal shutdown. The MAX20096 is available in a Increase System Reliability space-saving thermally enhanced (5mm x 5mm), 32-pin Short Circuit, Overvoltage, and Thermal Protection side-wettable TQFN package and is specified to operate -40C to +125C Operating Temperature Range over the -40C to +125C automotive temperature range. Thermal Monitor and LED Current Monitor The MAX20097 is available in a 28-pin thermally enhanced Fault Diagnosis Through SPI Interface and Through TSSOP package, but does not have the SPI interface. It FLTB Pin for Applications without SPI Interface includes an open-drain fault flag (FLTB) that goes low in case of an open string, shorted string, or overvoltage activation in any one of the channels, or also in thermal shutdown. Applications Ordering Information appears at end of data sheet. Automotive Exterior Lighting High-Beam/Low-Beam/Signal/Position Lights Daytime Running Lights (DRLs) Fog Light and Adaptive Front Light Assemblies Commercial, Industrial, and Architectural Lighting 19-100097 Rev 2 2/19MAX20096/MAX20097 Dual-Channel Synchronous Buck, High-Brightness LED Controller with and without SPI Interface Absolute Maximum Ratings V to V ........................................................-0.3V to +70V Short-Circuit Current on V ....................................Continuous IN AGND CC V to V ...........................................-0.3V to (V + 0.3)V Continuous Power Dissipation (Multilayer Board) LX AGND IN V , V to V ........................................-2.5V to +6V 32-Pin SW TQFN (T = +70C, derate 34.5mW/C CSN CSP AGND A V , V to V ..............................................-0.3V to +6.0V above +70C) .........................................................2758.6mW CC IO AGND V to V ................................................-0.3V to +72.0V Continuous Power Dissipation (Multilayer Board) BST AGND V to V ......................................................-0.3V to +6.0V 28-Pin TSSOP (T = +70C, derate 29.7mW/C BST LX A V to V ...................................................-0.3V to +65V above +70C) ................................................mW to 2380mW TON AGND V to V .................................................-0.3V to +0.3V Operating Temperature Range ......................... -40C to +125C PGND AGND V to V .................................................-0.3V to +2.5V Junction Temperature ......................................................+150C REFI AGND V to V ...................................................-0.3V to +6.0V Storage Temperature Range ............................ -40C to +150C DIM AGND V , V , V , V , V to V Soldering Temperature (reflow) .......................................+260C OUT CSB SCLK SDI RESETB AGND -0.3V to +6.0V, V to V ..........-0.3V to (V + 0.3)V SDO AGND IO Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation 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. (Note 1) Package Thermal Characteristics 32-Pin SW TQFN 28-Pin TSSOP Thermal Resistance, Single-Layer Board: Thermal Resistance, Single-Layer Board: Junction-to-Ambient Thermal Resistance ( ) ..........47C/W Junction-to-Ambient Thermal Resistance ( ) ..........45C/W JA JA Junction-to-Case Thermal Resistance ( ) .................3C/W Junction-to-Case Thermal Resistance ( ) .................2C/W JC JC Thermal Resistance, Four-Layer Board: Thermal Resistance, Four-Layer Board: Junction-to-Ambient Thermal Resistance ( ) ..........36C/W Junction-to-Ambient Thermal Resistance ( ) .......33.6C/W JA JA Junction-to-Case Thermal Resistance ( ) .................3C/W Junction-to-Case Thermal Resistance ( ) ..............3.3C/W JC 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. For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Electrical Characteristics (V = 12V, Limits are 100% tested at T = +25C and T = +125C. Limits over the operating temperature range and relevant supply IN A A voltage range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY VOLTAGE Operational Supply Voltage V 4.5 65 V IN IN Supply Current I DIM1 = DIM2 = 5V 10 mA INQ V REGULATOR CC I = 1mA, 5.5V < V < 65V 4.875 5.0 5.125 V VCC IN Output Voltage V CC I = 10mA, 6V < V < 25V 4.875 5.0 5.125 VCC IN V Dropout Voltage I = 10mA, V = 4.5V 200 500 mV CC VCC IN1 V Short-Circuit Current VCC V = 0V 60 mA CC IMAX CC V Undervoltage Lockout, CC VCC I rising 3.8 4.1 4.4 V UVLOR NS Rising V Undervoltage Lockout, CC VCC I falling 3.85 4.15 V UVLOF NS 3.55 Falling Maxim Integrated 2 www.maximintegrated.com