Datasheet TMC7300 (TRINAMIC) - 8

TMC7300 DATASHEET (Rev. 1.01 / 2019-NOV-06) 8
Pin Number Type Function
Motor supply voltage. Provide filtering capacity >10µF near pin with VS 18 shortest possible loop to GND pad. OA1 19 DC motor 1 output 2 Sense resistor connection for coil A or DC motor 1. Place sense BRA 20 resistor to GND near pin. Exposed Connect the exposed die pad to a GND plane. Provide as many as - die pad possible vias for heat transfer to GND plane.
2.3 Package Outline / Halfbridge mode
A 1 1 B R B R B OA VS O B 20 19 18 17 16 1 OA2 15 OB2 VCP 2 14 GND 3 TMC7300 A1 13 1.8VOUT (4 Halfbridge) 4 A2 © B. Dwersteg, 12 DIAG 5 TRINAMIC B1 PAD 11 VIO/NSTDBY 6 7 8 9 10 T E B2 EN R D M A O W U M P NE
Figure 2.2 TMC7300 Pinning Top View Stepper Driver – QFN20, 3x3mm², 0.4mm pitch 2.4 Signal Descriptions / Halfbridge mode Pin Number Type Function
OA2 1 Bridge A output 2 Charge pump voltage. Optionally tie to VS using 1nF to 100nF VCP 2 capacitor. May be left unconnected if maximum 2 pins change at a time. A1 3 DI Bridge A output 1 polarity A2 4 DI Bridge A output 2 polarity B1 5 DI Bridge B output 1 polarity B2 6 DI Bridge B output 2 polarity Enable input. The power stage becomes switched off (all motor EN 7 DI outputs floating) when this pin becomes driven to a low level. Also used to release driver after fault shutdown. ENUART 8 DI tie to GND MODE 9 DI tie to VIO Common PWM for high-side drivers. Tie high to enable high-side PWM 10 DI drivers as controlled by A and B inputs. Influences high-side driver, only. 1.8V to 5V IO supply voltage for all digital pins. IC goes to standby VIO/NSTDBY 11 mode and resets, when this pin is pulled to GND. DIAG 12 DO Diagnostic output. High level upon driver error. Reset by EN=low. Output of internal 1.8V regulator. Attach 100nF ceramic capacitor to 1.8VOUT 13 GND near to pin for best performance. Provide the shortest possible loop to the GND pad. www.trinamic.com