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
Board description EVAL6235Q
Figure 2. EVAL6235Q - schematic
J5
123
C4A
OPTION
+
PTH OPTION
220n/16V
C1
VS
21
10n/100V
C7
3
D1
BAV99
1 2
C5
100n/100V
40
R7 100
35
34
27
26
U1
VBOOT
VCP
VSA
VSA
VSB
VSB
44
DIAG
3
OUT12OUT1
BRAKE20H241H1
17EN18
FW/REV
43
L6235Q
42
OUT238OUT2
H3
39
RCOFF48RCPULSE13VREF
19
23
OUT322OUT3
TACHO
12
NC25NC28NC29NC30NC32NC33NC36NC37NC
NC1NC4NC5NC7NC8NC
47
R13
0.2/1W
16
SNSB
15
SNSB
46
SNSA
SNSA
GND
GND
EPAD
NC10NC
NC14NC
9
11
24
R14
0.2/1W
45
31
6
49
Application reference
3V3 3V3
1
1
VS GND
VS
1
2
J1
VS
GND
R2
R1
52V - 8V
VS
10k/1%
NM
DIAG
BRAKE
J4
1 2
R5 100k
R20 56k
R19 56k
FW_REVH3BRAKE
H1
FW_REVH1H2
C8
EN
C3
100n/100V
+
C4
100u/63V
C6
100n/4V
R3
ID1
23k2/1%
C2
100n/4V
0
R4
ID0
5V3V3 VDD
31
J2
5V
2
1234567891011121314151617181920212223242526272829
J3
5.6n/6V3
R6 4k3
3V3
RCOFF
H3
3 1
VREF
1k
R8
TACHO
C11
10n/6V3
R10
SLOUT
10k
47k
C10
820p/6V3
RCOFF
ID0
1
GND
VDD
R18
10k
R11
100K
3
ID1
1
R12
2
4k3
DIAG
H2
30
CON-FLAT-15X2-180M-INLINE
R17
R16
R15
VDD VDD
AM12701v1
10k
10k
10k
VREF
TACHO
12345
J8
VREF
TACHO
H1H2H3
12345
J7
H2H3VDD
H1
SLOUT
SLOUT
VDD
STRIP254P-M-5
GND
GND
STRIP254P-M-5
C9
68n/6V3
2
J6
R9
EN
H2
4/9 Doc ID 023062 Rev 1
EVAL6235Q Board description
Table 5. EVAL6235Q - bill of material
Index Quantity Reference Value Package
1 1 C1 220 nF / 16 V CAPC-0603
2 2 C2, C6 100 nF / 4 V CAPC-0603
3 2 C3, C5 100 nF / 100 V CAPC-0805
4 1 C4 100 µF / 63 V CAPES-R10H10
5 1 C4A 100 µF / 63 V (option) CAPE-R8H12-P35
6 1 C7 10 nF / 100 V CAPC-0805
7 1 C8 5.6 nF / 6V3 CAPC-0603
8 1 C9 68 nF / 6V3 CAPC-0603
9 1 C10 820 pF / 6V3 CAPC-0603
10 1 C11 10 nF / 6V3 CAPC-0603
11 1 D1 BAV99 SOT23
12 1 J1 Screw connector 2 poles MORSV-508-2P
13 2 J2, J6 Jumper - close 12 JP3SO
14 1 J3
15 1 J4 Jumper - close JP2SO
16 1 J5 Screw connector 3 poles MORSV-508-3P
17 2 J7, J8 Pin strip header 1x5 poles STRIP254P-M-5
18 1 R1 NM RESC-0603
19 1 R2 10 kΩ / 1% RESC-0603
20 1 R3 23.2 kΩ / 1% RESC-0603
21 1 R4 0 Ω RESC-0603
22 1 R5 100 kΩ RESC-0603
23 2 R6, R12 4.3 kΩ RESC-0603
24 1 R7 100 Ω RESC-0603
25 1 R8 1 kΩ RESC-0603
26 5 R9, R15, R16, R17, R18 10 kΩ RESC-0603
27 1 R10 47 kΩ RESC-0603
28 1 R11 100 kΩ TRIMM-100x50x110-64W
29 2 R13, R14 0.4 Ω / 1 Ω RESC-2512
30 2 R19, R20 56 kΩ RESC-0603
Pol. IDC male header
vertical 30 poles
CON-FLAT-15X2-180M
31 1 TP1 TPTH-RING-1 mm red TH
32 2 TP2, TP3 TPTH-RING-1 mm black TH
33 1 U1 L6235Q QFN7x7_48
Doc ID 023062 Rev 1 5/9
Board description EVAL6235Q
Figure 3. EVAL6235Q - layout (silk screen)
AM12702v1
Figure 4. EVAL6235Q - layout (top layer)
Figure 5. EVAL6235Q - layout (inner layer 2)
6/9 Doc ID 023062 Rev 1
AM1270
3v1
AM12704v1
EVAL6235Q Board description
Figure 6. EVAL6235Q - layout (inner layer 3)
AM12705v1
Figure 7. EVAL6235Q - layout (bottom layer)
AM12706v1
Doc ID 023062 Rev 1 7/9
Revision history EVAL6235Q
2 Revision history
Table 6. Document revision history
Date Revision Changes
11-Apr-2012 1 Initial release.
8/9 Doc ID 023062 Rev 1
EVAL6235Q
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Doc ID 023062 Rev 1 9/9
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