Click here to ask about the production status of specific part numbers. MAX22203 65V, 3.8A Dual Brushed or Single Stepper Motor Driver with Integrated Current Sense General Description Benefits and Features The MAX22203 is a dual 65V, 3.8A H-Bridge with Two H-Bridges with 65V Maximum Operating Voltage MAX PWM inputs and accurate Current Drive Regulation Total R (High-Side + Low-Side): 300m typical ON (CDR). Each H-Bridge can be controlled individually and (T = 25C) A has a very low typical R (high-side + low-side) of 0.3, ON Current Ratings Per H-Bridge (Typical at 25C): resulting in high driving efficiency and low heat generation. I = 3.8A (Impulsive Current for Driving MAX The MAX22203 can be used to drive two Brushed DC mo- Capacitive Loads) tors or a single Stepper Motor. I = 3A (Maximum Current Setting for TRIP MAX The integrated CDR can limit the start up or stall the cur- Internal Current Drive Regulation) rent of a Brushed DC motor or control the phase current I = 2A RMS RMS for stepper operation. Integrated Current Drive Regulation (CDR) The bridge output current is sensed by a non-dissipative Internal Current Sensing (ICS) Eliminates External Integrated Current Sensing (ICS) eliminating the bulky ex- Bulky Resistors and Improves Efficiency ternal power resistors (which are normally required for this Current Drive Regulation Monitor Output Pins function) and compared with a configurable threshold cur- (CDRA and CDRB) rent (I ). The I threshold can be set independently Multiple Decay Modes (Slow, Mixed, Fast) TRIP TRIP for the two full bridges by connecting the external resistors Fixed Off Time Configurable with External to pins R and R . Resistance. EFA EFB The maximum output current per H-Bridge is I = 3.8A Current-Sense Output (Current Monitor) MAX and is limited by the Overcurrent Protection (OCP) circuit. Fault Indicator Pin (FAULT) This current can be driven for very short transients and Protections is aimed to effectively drive small capacitive loads. The Overcurrent Protection for Each Individual Channel maximum user-configurable current regulation threshold is (OCP) I = 3A. The maximum RMS current (I ) per Undervoltage Lockout (UVLO) TRIP MAX RMS H-Bridge is 2A on a standard JEDEC 4-layer board. Thermal Shutdown (TSD) T = +165C RMS J The maximum RMS current can be limited by thermal con- TQFN38 5mm x 7mm package (TSSOP38 4.4mm x siderations and depends on the thermal characteristic of 9.7mm available in the future) the application (PCB ground planes, heat sinks, forced air ventilation, etc). Ordering Information appears at end of data sheet. The MAX22203 features Overcurrent Protection (OCP), Thermal Shutdown (TSD), and Undervoltage Lockout (UVLO). An open-drain active low nFAULT pin is activated every time a fault condition is detected. During Thermal Shutdown and Undervoltage Lockout, the driver is tristat- ed until normal operations are restored. The MAX22203 is packaged into a small TQFN38 5mm x 7mm package. Applications Brushed DC Motor Driver Stepper Motor Driver Solenoid Driver Latched Valves 19-101012 Rev 0 5/21MAX22203 65V, 3.8A Dual Brushed or Single Stepper Motor Driver with Integrated Current Sense Simplified Block Diagram V CP1 CP2 VCP VM DD SLEEP FAULT ROFF MAX22203 PROTECTIONS CHARGE 1.8V OCP PUMP REGULATOR UVLO THERMAL SHUTDOWN V M 1:N VDD VCP GATE IREF DRIVER OUT1A VREFIN AND OCP CONTROL LOGIC AND REFA LEVEL V M SHIFTERS ENA VCP DIN2A GATE OUT2A DRIVER DIN1A AND OCP LIMITER PWM CURRENT COMPARATOR SENSE PGND IREF CDRA DECAY1 DECAY DECAY MODE ISENA SEL DECAY2 VM 1:N VDD VCP IREF GATE OUT1B VREFIN DRIVER AND OCP CONTROL LOGIC AND REFB LEVEL VM SHIFTERS ENB VCP DIN2B GATE OUT2B DRIVER DIN1B AND OCP LIMITER PWM CURRENT COMPARATOR SENSE PGND IREF CDRB ISENB AGND www.maximintegrated.com Maxim Integrated 2