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PDF TMC236A Data sheet ( Hoja de datos )
| Número de pieza | TMC236A | |
| Descripción | High current low power dissipation microstep stepper motor drive | |
| Fabricantes | TRINAMIC | |
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TMC236/A DATA SHEET (V2.07 / 2011-Aug-10)
1
TMC236/A – DATA SHEET
High current, low power dissipation microstep
stepper motor driver with protection /
diagnostics and SPI Interface
TRINAMIC® Motion Control GmbH & Co KG
Hamburg, Germany
WWW.TRINAMIC.COM
Features
The TMC236 / TMC236A (1) is a dual full bridge driver IC for bipolar stepper motor control
applications. It is realized in a HVCMOS technology combined with Low-RDS-ON high efficiency
MOSFETs (pat. pend.). It allows driving a coil current of up to 1500mA even at high environment
temperatures. Its low current consumption and high efficiency together with the miniature package
make it a perfect solution for embedded motion control and for battery powered devices. The low
power dissipation makes the TMC236 an optimum choice for drives, where a high reliability is desired.
Internal DACs allow microstepping as well as smart current control. The device can be controlled by a
serial interface (SPI™i) or by analog / digital input signals. Short circuit, temperature, undervoltage and
overvoltage protection are integrated.
Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals
Short circuit, overvoltage and over temperature protection integrated
Status flags for overcurrent, open load, over temperature, temperature pre-warning, undervoltage
Integrated 4 bit DACs allow up to 16 times microstepping via SPI (can be expanded to 64
microsteps)
Any resolution via analog control
Mixed decay feature for smooth motor operation
Slope control user programmable to reduce electromagnetic emissions
Chopper frequency programmable via a single capacitor or external clock
Current control allows cool motor and driver operation
Internal open load detector
7V to 34V motor supply voltage (A-type)
Up to 1500mA output current and more than 800mA at 105°C
3.3V or 5V operation for digital part
Low power dissipation via low RDS-ON power stage
Standby and shutdown mode available
(1) The term TMC236 in this datasheet always refers to the TMC236A and the TMC236. The major
differences in the older TMC236 are explicitly marked with “non-A-type”. The TMC236A brings a
number of enhancements and is fully backward compatible to the TMC236
Copyright © 2004, TRINAMIC Motion Control GmbH & Co KG
http://www.Datasheet4U.com
1 page  
TMC236/A DATA SHEET (V2.07 / 2011-Aug-10)
Pinning
ANN
OA1
VSA
OA2
OA1
BRA
OA2
1
2
3
4
5
6
7
8
9
10
11
TMC 236 / 236A
QFP44
33 BL2
32
OB1
31
30 VSB
29
OB2
28
27
OB1
26
25 BRB
24
OB2
23
5
Package codes
Type
TMC236A
TMC236
Package
PQFP44
PQFP44
Temperature range Lead free (ROHS)
Code/marking
automotive (1)
Yes
TMC236A-PA
automotive (1)
From date code 30/04 TMC236-PA
(1) ICs are not tested according to automotive standards, but are usable within the complete
automotive temperature range.
Copyright © 2004, TRINAMIC Motion Control GmbH & Co KG
http://www.Datasheet4U.com
5 Page 
TMC236/A DATA SHEET (V2.07 / 2011-Aug-10)
11
Open load detection
Open load is signaled, whenever there are more than 14 oscillator cycles without PWM switch off. Note
that open load detection is not possible while coil current is set to “0000”, because the chopper is off in
this condition. The open load flag will then always be read as inactive (“0”). During overcurrent and
undervoltage or over temperature conditions, the open load flags also become active!
Due to their principle, the open load flags not only signal an open load condition, but also a torque loss
of the motor, especially at high motor velocities. To detect only an interruption of the connection to the
motor, it is advised to evaluate the flags during stand still or during low velocities only (e.g. for the first
or last steps of a movement).
Standby and shutdown mode
The circuit can be put into a low power standby mode by the user, or, automatically goes to standby on
Vcc undervoltage conditions. Before entering standby mode, the TMC236 switches off all power driver
outputs. In standby mode the oscillator becomes disabled and the oscillator pin is held at a low state.
The standby mode is available via the interface in SPI-mode and via the ENN pin in non-SPI mode.
The shutdown mode even reduces supply current further. It can only be entered in SPI-mode by pulling
the ENN pin high. In shutdown additionally all internal reference voltages become switched off and the
SPI circuit is held in reset.
Power saving
The possibility to control the output current can dramatically save energy, reduce heat generation and
increase precision by reducing thermal stress on the motor and attached mechanical components. Just
reduce motor current during stand still: Even a slight reduction of the coil currents to 70% of the current
of the last step of the movement, halves power consumption! In typical applications a 50% current
reduction during stand still is reasonable.
Copyright © 2004, TRINAMIC Motion Control GmbH & Co KG
http://www.Datasheet4U.com
11 Page | ||
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