EVAL-L99SM81VY Series

Programmable Stepper Motor Driver for Automotive Applications with Micro-Stepping and Stall Detection

Catalog

Programmable Stepper Motor Driver for Automotive Applications with Micro-Stepping and Stall Detection

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Voltage - Load	Qualification	Step Resolution	Technology	Mounting Type	Function	Motor Type - Stepper	Output Configuration	Package / Case	Current - Output	Grade	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Interface	Type	Utilized IC / Part	Primary Attributes	Supplied Contents	Contents
STMicroelectronics L99SM81VQ6TR	6 V	28 V	5 VDC	AEC-Q100	1 1/16 1/2 1/4 1/8	Power MOSFET	Surface Mount	Driver	Bipolar	Half Bridge (2)	40-TFQFN Exposed Pad	1.35 A	Automotive	40-QFN (6x6)	150 °C	-40 °C	PWM SPI
STMicroelectronics EVAL-L99SM81VQ																		Power Management	L99SM81V	Motors (Stepper)	Board(s)
STMicroelectronics EVAL-L99SM81VY																		Power Management	L99SM81V			Board(s)

Catalog

Programmable Stepper Motor Driver for Automotive Applications with Micro-Stepping and Stall Detection

Key Features

• Programmable stepping mode:

- Full step, Half step, Mini step, 1/8 Micro step, 1/16 Micro step

• Equivalent 10 bit resolution on current regulation loop:

- Two 4-bit programmable full scale current amplitudes: one for RUN and one for HOLD mode

- 6-bit DAC for reference current generation (whatever programmed full scale amplitude)

• 4 programmable decay modes:

- Slow-mode, mixed-mode and 2x automatically selected decay-modes

Description

The EVAL-L99SM81VQ is an evaluation board designed to drive one bipolar stepper motor in micro-stepping mode together with coil voltage measurement for stall detection. The evaluation board consists in a motherboard and a daughterboard on which the L99SM81VQ6 is mounted. Both of the evaluation boards provide electronic control modules with enhanced power management power supply functionalities including one standby mode. The motherboard, based on SPC56 microcontroller, provides the logic section for monitoring and driving the L99SM81VQ6 assembled on the daughterboard. With the aim of making the board usage and settings simpler, ST provides dedicated user-friendly software with a Graphic User Interface (GUI). This enables the user to set L99SM81VQ6 parameters and at the same time to get real time information from the device, such as voltage measurements, main power supply voltage, fault flags, device junction temperature and much more.