LMD18245
FEATURES
- 2 DMOS Power Stage Rated at 55V and 3A Continuous
- Low RDS(ON) of Typically 0.3Ω per Power Switch
- Internal Clamp Diodes
- Low-loss Current Sensing Method
- Digital or Analog Control of Motor Current
- TTL and CMOS patible Inputs
- Thermal Shutdown (Outputs Off) at TJ = 155°C
- Overcurrent Protection
- No Shoot-Through Currents
- 15-lead Package
APPLICATIONS
- Full, Half and Microstep Stepper Motor Drives
- Stepper Motor and Brushed DC Motor Servo
Drives
- Automated Factory, Medical and Office
Equipment
DESCRIPTION
The LMD18245 full-bridge power amplifier incorporates all the circuit blocks required to drive and control current in a brushed type DC motor or one phase of a bipolar stepper motor. The multitechnology process used to build the device bines bipolar and CMOS control and protection circuitry with DMOS power switches on the same monolithic structure. The LMD18245 controls the motor current via a fixed off-time chopper technique.
An all DMOS H-bridge power stage...
