Product overview
Description
The L99SM81V is an automotive grade integrated driver for bipolar two-phase stepper motors capable of current controlled micro-stepping with programmable amplitude. The device features a 5 V voltage regulator to supply external sensors. The integrated Serial Peripheral Interface (SPI) makes it possible to adjust device parameters, control all operating modes and read out diagnostic information. Digital I/Os are also optionally usable for more flexible and reliable application control.-
All features
- AEC-Q100 qualified
- Stepper motor driver with up to 1.35 A current capability
- Programmable stepping mode:
- Full step, Half step, Mini step, 1/8 Micro step, 1/16 Micro step
- Current regulation by integrated PWM control with fully integrated current sensing
- 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
- 3x programmable inputs for direct control of step clock, direction, hold and step modes
- 1x programmable analog output for Tj measurement or band-gap reference
- 2x programmable digital outputs for internally generated PWM ON duty cycles, error signals, coils voltage measurement synchronization signals
- Programmable MOSFETs switching speed: four options for EMC and power dissipation trade-off optimization
- PWM frequency wobbling for reduction of conducted EM energy
- Outputs protection and diagnosis (open load, short to battery, short to GND)
- Integrated ADC for coil voltage measurement and stall detection
- 5 V low drop voltage regulator short-circuit protected
- Very low current consumption in standby mode (typ. 10 µA)
- Thermal warning and shutdown
- ST SPI 4.0 interface for control and diagnostics
You might also like...
All tools & software
All resources
| Resource title | Latest update |
|---|
Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Jun 2017 | 19 Jun 2017 |
Application Notes (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 16 Apr 2021 | 16 Apr 2021 |
Flyers (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 25 Mar 2021 | 25 Mar 2021 |
Selection Guides (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 02 Mar 2021 | 02 Mar 2021 | |||
| 16 Apr 2021 | 16 Apr 2021 |
Brochures (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 02 Mar 2020 | 02 Mar 2020 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L99SM81V
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Symbols
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L99SM81VQ6 | NRND | VFQFPN 6X6 | Automotive | Ecopack2 | |
| L99SM81VQ6TR | Active | VFQFPN 6X6 | Automotive | Ecopack2 | |
| L99SM81VY | NRND | PowerSSO 36 | Automotive | Ecopack2 | |
| L99SM81VYTR | Active | PowerSSO 36 | Automotive | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L99SM81VY | No availability of distributors reported, please contact our sales office | NRND | EAR99 | NEC | Tube | PowerSSO 36 | - | - | - | |||
| L99SM81VYTR | 2 distributors | Active | EAR99 | NEC | Tape And Reel | PowerSSO 36 | - | - | MALAYSIA | 1.9592 / 1k | ||
| L99SM81VQ6TR | 2 distributors | Active | EAR99 | NEC | Tape And Reel | VFQFPN 6X6 | - | - | THAILAND | 1.9175 / 1k | ||
| L99SM81VQ6 | No availability of distributors reported, please contact our sales office | NRND | EAR99 | NEC | Tray | VFQFPN 6X6 | - | - | - | |||
Marketing Status
NRNDECCN (US)
EAR99Budgetary Price (US$)*/Qty
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.9592 / 1kMarketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.9175 / 1kMarketing Status
NRNDECCN (US)
EAR99Budgetary Price (US$)*/Qty
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
