Datasheet > L99SM81V

L99SM81V

更新时间： 2024-09-18 14:58:15

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		电机驱动驱动器
页数	文件大小	规格书
85页	3325K
描述
具有微步进和失速检测的可编程步进电机驱动器，用于汽车应用

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L99SM81V 数据手册

L99SM81V

Programmable stepper motor driver for automotive applications

with micro-stepping and stall detection

Datasheet - Production data

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 4.1 interface for control and

diagnostics

Features



AEC-Q100 qualified

Stepper motor driver with up to 1.35 A

current capability



Programmable Step 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:

Applications

Bipolar 2 phase stepper motor driver for

automotive applications like adaptive front light

systems or projectors for head-up displaying



Two 4-bit programmable full scale

current amplitudes: one for RUN and

one for HOLD mode

Description



6-bit DAC for reference current

generation (whatever programmed full

scale amplitude)

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.



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 T_j

measurement or band-gap reference

2x programmable digital outputs for

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.

internally generated PWM ON duty cycles,

June 2017

DocID027599 Rev 4

1/85

www.st.com

This is information on a product in full production.

12 3 4 5 6 7...85

中文翻译

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