E910.94

Pinout




Specifications

• Operating voltage range VDD 7V to 16V
• Low standby current typ. 40A
• Speed regulation using the ripple detection principle (Evaluation of commutation ripple)
• Fully protected half bridge (slew rate, gate voltage and temperature)
• Overlap free PWM actuation for external power MOS half bridge
• Internal charge pump for 100% PWM duty cycle actuation
• Adjustable maximum motor voltage
• Conditioning of motor current for external P and ADC
• Watchdog with emergency function depending on the clamp 15 (Kl.15) signal
• CRASH input for emergency shutoff of the DC motor
• STATUS output for failure analysis
• Overvoltage shutdown
• Overtemperature shutdown
• 40C to +125C operating temperature
• SO24 package

Description

The E910.94 IC is designed to control the speed of DC-motors. In order to determine the motor speed the commutation-related ripple of the motor current is evaluated and converted to a 5V digital signal for the C. The filtered motor current is also buffered and provided to the Cs ADC. Many types of motors can be adapted with appropriate filter design.

The E910.94 nominal motor voltage, provided by the C is converted into a 20kHz PWM signal used to drive the power MOS half bridge. Duty cycle of 100% is possible due to an implemented charge pump.

The E910.94 CRASH signal immediately stops the motor in case of an error. An overtemperature driver shut down is provided with appropriate TEMPFET transistors (optional). With an integrated power supply and watchdog, an emergency function with maximum motor drive can be realized in case of C failure.