EVALUATION KIT AVAILABLE MAX14871 4.5V to 36V Full-Bridge DC Motor Driver General Description Benefits and Features The MAX14871 DC motor driver provides a low-power Drive More Power and Reduce Footprint and simple solution for driving and controlling brushed Up to 2.8A Peak Motor-Current Package motors with voltages between 4.5V and 36V. Very low Flexible 4.5V36V Supply Enables Longer Runtime driver on resistance reduces power during dissipation. Low Power Consumption Runs Cooler and Longer The MAX14871 features a charge-pump-less design for 334m (typ) Total Bridge On-Resistance reduced external components and low supply current. 1mA (typ) Supply Current at 30kHz/24V Integrated current regulation allows user-defined peak startup 10A (max) Standby Current at 12V motor currents and requires minimal external components. Simplified Designs Reduces Time to Market The MAX14871 includes 3 modes of current regulation: Charge-Pump-Less Architecture fast decay, slow decay, and 25% current ripple modes. Current Regulation Only Requires a Sense Resistor Current regulation based on 25% ripple simplifies the Current-Sense Input Simplifies PCB Layout design and enables regulation independent of motor Internal/External V for Current Regulation REF characteristics. A separate voltage sense input (SNS) reduc- Fast/Slow/25% Ripple Current Regulation Modes es current-sensing errors due to parasitic trace resistance. Integrated Protection Provides Robust Driving Solutions The MAX14871 features shoot-through protection and Short-Circuit-Protected Drivers internal free-wheeling diodes that absorb inductive motor currents. Driver outputs are short-circuit-protected from Thermal Shutdown Undervoltage Lockout shorts to ground, to the supply, and between M1 and M2. Diagnostic FAULT Output An active-low FAULT output signals thermal overload and -40C to +85C Temperature Range overcurrents during fault conditions. The MAX14871 is available in a 16-pin TSSOP-EP package and operates over the -40C to +85C temperature range. Ordering Information appears at end of data sheet. Applications Printers and Scanners Industrial Automation Vending and Gaming Machines Typical Application Circuit 24V M M1 V M2 DD 3.3V 3.3V MAX14871 FAULT IRQ DIR VDD V DD GPO C PWM PWM DRIVER EN 3.3V DRIVER VREF TCOFF CURRENT C REGULATION OFF MODE GND SNS COM RSENSE 19-7063 Rev 0 9/14MAX14871 4.5V to 36V Full-Bridge DC Motor Driver Absolute Maximum Ratings (All voltages referenced to GND) Single-Layer Board (derate at 21.3mW/C V ........................................................................-0.3V to +40V above +70C) ............................................................1702mW DD M1, M2 ....................................................... -0.3V to (V +0.3V) Multiple-Layer Board (derate at 26.1mW/C DD PWM, DIR, FAULT, EN, SNS, VREF, above +70C) ............................................................2088mW MODE, TCOFF -0.3V to +6.0V Operating Temperature Range ........................... -40C to +85C ............................................................... COM .....................................................................-0.3V to +0.3V Junction Temperature ......................................................+150C Current Into M1, M2 .............................................................3A Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (Soldering, 10s) ................................+300C A Solder Temperature (Reflow) .........................................+260C 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. Package Thermal Characteristics (Note 1) Junction-to-Case Thermal Resistance ( ) Junction-to-Ambient Thermal Resistance ( ) JC JA TSSOP-EP (Single-Layer Board) ..................................3C/W TSSOP-EP (Single-Layer Board) ................................47C/W TSSOP-EP (Multiple-Layer Board) ................................3C/W TSSOP-EP (Multiple-Layer Board) ...........................38.3C/W Note 2: 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 = 4.5V to 36V, T = T to T , unless otherwise noted. Typical values are at V = 12V, T = +25C)(Note 3) DD A MIN MAX DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage V 4.5 36 V DD f = 50kHz 1 PWM EN = low, M1/M2 Supply Current I mA DD not connected No switching 0.5 1.2 V = 12V 3.7 10 EN = high, Driver DD Shutdown Supply Current I A SHDN is in shutdown V = 36V 10 20 DD Undervoltage Lockout V V rising 3.3 3.8 4.3 V UVLO DD Threshold Undervoltage Lockout V 400 mV UVLO HYST Threshold Hysteresis DRIVER (M1, M2) T = 25C 334 435 Driver Output Resistance J R I = 2.8A m ON M (High-Side + Low-Side) T = 125C 465 620 J Driver Overload Current Limit I 3 A M OL M1, M2 Leakage Current I EN = High, V = V = 0V or V -1 +1 A M LKG M1 M2 DD Low-side diode, EN = High, I = 2.8A 1.5 F M1, M2 Body Diode Forward- V V BF Voltage High-side diode, EN = High, I = 2.8A 1.5 F Maxim Integrated 2 www.maximintegrated.com