Chip Introduction
The SS8844T provides four independently controllable 1/2 H bridge initiators. It can be used to drive two DC motors, one stepper motor, four solenoids, or other loads. The output driver channel for each channel consists of an N-channel Power MOSFET configured in a 1/2 H bridge configuration.
The SS8844T provides up to 2.5A peak current or 1.75A root mean square (RMS) output current on each bridge channel (with appropriate printed circuit board (PCB) heat dissipation at 24V and 25 ° C). SS8844T internal shutdown function includes overcurrent protection, short circuit protection, Undervoltage-lockout protection and overtemperature protection, and provides a fault output pin nFAULT pin.
SS8844T provides an ETSSOP28 package with exposed solder pads, which can effectively improve heat dissipation performance and is a lead-free product. The pin frame is 100% Wuxi plated.
Chip characteristics
Dual channel H-bridge current control motor driver - single or two brushless DC motors - one stepper motor - completely independent half bridge control
Industry standard IN/IN digital control interface
Low conduction impedance metal oxide semiconductor field-effect transistor (MOSFET) -24V, can achieve a maximum driving current of 2.5A at Ta=25 ° C -24V, and RDS (on) at Ta=25 ° C is 350m Ω (typical value HS+LS)
8.2~40V working voltage range
Built in 3.3V reference voltage
Surface mount packaging with heat dissipation fins
Protection characteristics - Overcurrent protection (OCP) - Thermal shutdown (TSD) - Under voltage lockout (UVLO) - Fault display Pin (nFAULT)
