SPMD150STP STMicroelectronics, SPMD150STP Datasheet - Page 19

• Manufacturer Part Number: SPMD150STP
• Description: MOD STEPPER MOTOR DRV 1.5A BIPO
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of SPMD150STP

• Motor Type: Stepper, Bipolar
• Number Of Motors: 1
• Current - Output: 1.5A
• Transistor Type: MOSFET
• Termination Style: PC Pin
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 50 V
• Supply Current: 1.5 A
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10065

SPMD150STP
4.6
Figure 20. Microstepping
Non-dissipative overcurrent protection
The SPMD150STP integrates an overcurrent protection circuit.
This circuit provides protection against a short circuit to ground or between two phases of
the bridge.
To implement the over current detection, a sensing element that delivers a small but precise
fraction of the output current is implemented with each high side power MOSFET.
Since this current is a small fraction of the output current, there is very little additional power
dissipation.
This current is compared with an internal reference, when the output current reaches the
detection threshold (typically 5.6A) the OCP comparator signals a fault condition.
If a fault condition is detected, the EN pin is pulled below the turn off threshold (1.3V typical)
by an internal open drain MOSFET with a pull down capability of 4mA.
Doc ID 17160 Rev 1
Function description and application information
19/23