TMC2208

Part: TMC2208-LA (TMC2208/2 & TMC2224/0/5 family) — Trinamic

Type: Step/Dir Driver for Two-Phase Bipolar Stepper Motors

Description: 4.75–36 V DC, up to 2 A peak (1.4 A RMS) step/dir stepper driver with integrated power MOSFETs (LS 280 mΩ / HS 290 mΩ typ. at 25 °C), stealthChop2 silent operation, and a single-wire UART interface.

Operating Conditions:

• Supply voltage: 4.75–36 V DC
• Microstep resolution: 2, 4, 8, 16 or 32 microsteps by pin setting; up to 256 microsteps via microPlyer interpolation
• Motor current: up to 2 A peak per coil (up to 1.4 A RMS)

Absolute Maximum Ratings:

• Power bridge repetitive output current: 2.5 A
• Max junction temperature: 150 °C (TJ range -50 to 150 °C)
• Storage temperature: -55 to 150 °C
• I/O supply voltage (VVIO): -0.5 to 5.5 V
• 5V regulator output current: 25 mA

Key Specs:

• Supply voltage range: 4.75–36 V DC
• Peak coil current: 2 A (up to 1.4 A RMS)
• RDSon: LS 280 mΩ, HS 290 mΩ (typ. at 25 °C)
• Microstepping: 2/4/8/16/32 by pin, 256 via microPlyer interpolation
• Abs max repetitive bridge output current: 2.5 A
• Abs max 5V regulator output current: 25 mA (continuous dissipation 0.5 W)
• ESD (HBM): 4 kV for interface pins, 1 kV for handling
• UART baud rate: 9600 Baud to 500k Baud, with automatic adaptation

Features:

• stealthChop2 silent motor operation
• spreadCycle highly dynamic chopper
• microPlyer interpolation to 256 microsteps
• Automatic standby current reduction
• Internal sense resistor option
• Passive braking and freewheeling
• Single-wire UART with CRC and OTP for configuration
• Integrated pulse generator for standalone motion
• Full protection and diagnostics (short, open load, overtemperature, undervoltage)

Applications:

• 3D printers
• Printers, POS
• Office and home automation
• Textile and sewing machines
• CCTV and security
• ATM and cash recyclers
• HVAC

Package:

• QFN28, 5 x 5 mm (TMC2208-LA, TMC2224-LA)
• QFN32 wettable edge, 5 x 5 mm (TMC2202-WA)
• TQFP48, 9 x 9 mm (TMC2220-TA, option)
• HTSSOP28, 9.7 x 6.4 mm (TMC2225-SA, option)

2-phase

stepper motors up to 2A coil current (peak) with 2, 4, 8, 16 or 32 microstep pin

STEP/DIR Interface setting

Smooth Running 256 microsteps by microPlyer™ interpolation stealthChop2™ silent motor operation

spreadCycle™ highly dynamic motor control chopper

Low RDSon LS 280mΩ & HS 290mΩ (typ. at 25°C)

Voltage Range 4.75… 36V DC

Automatic Standby current reduction (option)

Internal Sense Resistor option (no sense resistors required)

Passive Braking and Freewheeling

Single Wire UART & OTP for advanced configuration options

Integrated Pulse Generator for standalone motion

Full Protection & Diagnostics

Choice of QFN, TQFP and HTSSOP packages for best fit

Compatible Design Upgrade 3D Printers Printers, POS Office and home automation Textile, Sewing Machines CCTV, Security ATM, Cash recycler

HVAC

The TMC22xx family comes in a number of package variants in order to fit different footprints. Please check for availability.

The maximum ratings may not be exceeded under any circumstances. Operating the circuit at or near more than one maximum rating at a time for extended periods shall be avoided by application design.

The following table shall give an idea on the thermal resistance of the package. The thermal resistance for a four layer board will provide a good idea on a typical application. Actual thermal characteristics will depend on the PCB layout, PCB type and PCB size. The thermal resistance will benefit from thicker CU (inner) layers for spreading heat horizontally within the PCB. Also, air flow will reduce thermal resistance.

A thermal resistance of 30K/W for a typical board means, that the package is capable of continuously dissipating 3.3W at an ambient temperature of 25°C with the die temperature staying below 125°C. Note, that a thermally optimized layout is required.

Table 18.1 Thermal characteristics TMC22xx

Note

A spread-sheet for calculating TMC22xx power dissipation is available on www.trinamic.com.

Figure 3.1 Standard application circuit

The standard application circuit uses a minimum set of additional components. Two sense resistors set the motor coil current. See chapter 8 to choose the right sense resistors. Use low ESR capacitors for filtering the power supply. The capacitors need to cope with the current ripple cause by chopper operation. A minimum capacity of 100μF near the driver is recommended for best performance. Current ripple in the supply capacitors also depends on the power supply internal resistance and cable length. VCC_IO can be supplied from 5VOUT, or from an external source, e.g. a 3.3V regulator.

Figure 2.1 TMC2208 Pinning Top View - type: QFN28, 5x5mm², 0.5mm pitch