Chip Introduction
SS8841 provides a dual channel integrated motor drive solution for integrated applications of printers and other motors. SS8841 has two H-bridge drives, each of which can provide a maximum peak current of 2.5A and an average
The square root current is 1.75A (under appropriate heat dissipation conditions of 24V and Ta=25 ° C), which can drive two brush type DC motors, or a bipolar stepper motor, or a solenoid or other inductive load. Bipolar stepper motors can operate in full steps, 2 subdivisions, 4 subdivisions, or achieve high subdivisions using software.
The power output module of each H-bridge of SS8841 is composed of N-type Power MOSFET. Each H-bridge contains a rectifier circuit and a current limiting circuit. Simple parallel digital control interface with optional attenuation mode
Choose fast attenuation, slow attenuation, and mixed attenuation.
SS8841 provides a low-power sleep mode to turn off internal circuits to achieve very low quiescent current. This sleep mode is achieved by setting the nSLEEP pin. Internal shutdown function package
It includes overcurrent protection, short circuit protection, Undervoltage-lockout protection and overtemperature protection, and provides a fault output pin nFAULT pin.
SS8841 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.
Application: POS printers, security cameras, office automation equipment, game machines, robots
Chip characteristics
Dual channel H-bridge current control motor driver
- Single or two brushless DC motors
- One stepper motor
PWM control interface
Current control selectable at fixed frequency
-2 bits current control, providing 4 current steps
Metal oxide semiconductor field-effect transistor with low conduction impedance
(MOSFET)
2.5A maximum drive can be achieved at 24V, Ta=25 ° C
current
At 24V, Ta=25 ° C, the RDS (on) is 350m Ω (typical
Type value HS+LS)
8.2~40V working voltage range
Sleep mode low current
Built in 3.3V reference voltage
Surface mount packaging with heat dissipation fins
Protective characteristics
- Overcurrent protection (OCP)
- Hot shutdown
