TMC603A Datasheet, PDF (18/44 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Three phase motor driver with BLDC back EMF commutation hallFX™ and current sensing

TMC603A DATA SHEET (V. 1.15 / 2009-Nov-19)
18
enable input, the TMC603 automatically switches off the bridges upon an error. The enable input then
should be driven via an open collector input plus pull-up resistor, or via a resistor.
TMC603 error logic
Drive with open drain
output, if feedback is
provided
ENABLE
CLR_ERR
undervoltage VLS
undervoltage VCP
D
short to GND 1
short to GND 2
short to GND 3
D
S: priority
SQ
RQ
Pull-up resistor can be
internal to microcontroller
+VCC
100k
/ERR_OUT
D
GND
Feedback connection for automatic self-protection
figure 13: error logic
Pin
/ERR_OUT
CLR_ERR
ENABLE
Comments
Error output (open drain). Signals undervoltage or overcurrent. Tie to ENABLE for
direct self protection of the driver. The internal error condition generator has a higher
priority than the CLR_ERR input, i.e. the error condition can not be cleared, as long as
it is persistent.
Reset of error flip-flop (active high). Clears error condition. The error condition should
at least be cleared once after IC power on.
Enables the power drivers (low: all MOSFETs become actively switched off)
5.2.11 Paralleling gate drivers for higher gate current
In order to double gate driver current in a BLDC application, two TMC603 can be switched in parallel
to have the double gate driver current while taking advantage of all features. Therefore it is important
to parallel the gate driver inputs and outputs of the second IC to the first IC, and to also parallel the
ERR_OUT and ENABLE input. The driver strength of both ICs adds taking into account their
respective slope control resistor. The switching regulator and charge pump of one device can supply
both ICs!
Copyright © 2009 TRINAMIC Motion Control GmbH & Co. KG