ST EVAL6235Q User Manual
3-phase BLDC motor driver mounting the L6235Q
Features
■ Voltage range from 8 V to 52 V
■ Phase current up to 2.5 Ar.m.s.
■ Adjustable PWM current control OFF-time
■ Logic inputs 5 V / 3.3 V compliant
■ Hall sensor inputs
■ External speed loop
■ Small application footprint with high thermal
performance
■ Suitable for use in combination with
PractiSPIN™ 2 software
EVAL6235Q
Data brief
AM12699v1
Description
The EVAL6235Q is a 3-phase BLDC motor driver
board that allows the user to test the L6235Q
functions.
The board can be driven using the STEVALPCC009V2 communication board and the
PractiSPIN 2 evaluation software.
April 2012 Doc ID 023062 Rev 1 1/9
For further information contact your local STMicroelectronics sales office.
www.st.com
9
Board description EVAL6235Q
1 Board description
Table 1. EVAL6208Q electrical specifications
Parameter Value
Supply voltage (VS) 8 to 52 V
Maximum output current (each phase) 2.5 Ar.m.s.
Low level logic input voltage 0 V
High level logic input voltage 5 V / 3.3 V
Maximum VREF input voltage (J2 connector) 3.3 V
Switching frequency Up to 100 kHz
Operating temperature - 25 to +125 °C
L6235Q thermal resistance junction-to-ambient TBD
1. Logic inputs are 3.3 V and 5 V compliant.
Figure 1. Trimmer, jumper and connector locations
J4: DIAG to EN
pin connection
Power supply connector
(8 V - 52 V)
(1)
3ph BLDC motor
connector
J6: VREF source selection
1-2 = J3 conn. (default), 2-3 = J8 conn.
OFF time regulation
External speed loop
connector
connector
Control board
connector
J2:
and pull-ups voltage selection
1-2 = 3.3 V (default), 2-3 = 5 V
AM12700v1
2/9 Doc ID 023062 Rev 1
EVAL6235Q Board description
Table 2. Control board connector pinout (J3)
Pin Type Function
1 Power supply 5 V supply voltage
2 Ground Ground
3 Logic output Hall effect H1 signal (H1 input of L6235Q)
4 Logic input Direction input (FW/REV input of L6235Q)
5 Logic output Hall effect H3 signal (H3 input of L6235Q)
6 Logic input Motor brake input (BRAKE input of L6235Q)
11 Analog input Reference voltage for current control system
13 Ground Ground
14 Supply voltage 3.3 V supply voltage
15 Logic output Hall effect H2 signal (H2 input of L6235Q)
16 Logic input Device enable input (EN input of L6235Q)
23 Ground Ground
24 Analog output Board identification system ID0
25 Analog output Board identification system ID1
28 Ground Ground
29 Logic output Fault output (DIAG output of L6235Q)
30 Logic input Hall effect H2 signal (H2 input of L6235Q)
Others Unconnected
Table 3. Hall effect sensors connector pinout (J7)
Pin Type Function
1 Logic input Hall effect H1 signal (H1 input of L6235Q)
2 Logic input Hall effect H2 signal (H2 input of L6235Q)
3 Logic input Hall effect H3 signal (H3 input of L6235Q)
4 Power supply Hall effect sensor supply voltage VDD (selected through J2 jumper)
5 Ground Ground
Table 4. External speed loop connector pinout (J8)
Pin Type Function
1 Logic output TACHO output from L6235Q
2 Analog output Speed loop reference voltage from J3 connector
3 Analog input Speed loop output to L6235Q VREF pin
(1)
4 Power supply Supply voltage VDD (selected through J2 jumper)
5 Ground Ground
1. The J6 jumper must be properly set (closed 2-3).
Doc ID 023062 Rev 1 3/9
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