TB67S521FTAG
Toshiba BiCD Process Integrated Circuit Silicon Monolithic
TB67S521FTAG
BiCD constant current two-phase bipolar stepping motor driver IC
The TB67S521FTAG is a PWM chopper type 2-phase bipolar
stepping motor driver IC.
By applying the BiCD process, the TB67S521FTAG is rated at
40 V /2.8 A (Absolute maximum ratings).
The on-chip V
CC
regulator allows control of a stepping motor
with a single V
M
power supply.
P-WQFN36-0606-0.50-002
Weght: 0.14 g (typ.)
Features
●
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Bipolar stepping motor driver
PWM constant current drive, PHASE-IN control
Operational in full, half, and quarter step resolutions
BiCD process: Use DMOSFET for the output power transistor.
High withstand voltage and large current: 40 V / 2.8 A (Absolute maximum ratings)
Built-in thermal shutdown circuit (TSD), over-current detection circuit (ISD), and POR
Package: P-WQFN36-0606-0.50-002
©2016 TOSHIBA Corporation
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2016-12-13
TB67S521FTAG
Pin Assignment
(Top View)
OUT_B1+
OUT_B2+
18 GND
17 OUT_B1-
16 OUT_B2-
15 GND
14 NC
13 GND
12 OUT_A2-
11 OUT_A1-
10 GND
1 2 3
IN_B1
IN_B2
4 5 6 7 8 9
RS_A2
OUT_A1+
OUT_A2+
STANDBY
GND
NC
RS_A1
27 26 25 24 23 22 21 20 19
NC 28
GND 29
VREF_B 30
VREF_A 31
OSCM 32
IN_A1 33
IN_A2 34
PHASE_A 35
PHASE_B 36
TB67S521FTAG
VM
RS_B1
RS_B2
NC
NC
VCC
NC
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TB67S521FTAG
Block Diagram
PHASE_A
PHASE_B
IN_B1
IN_B2
IN_A1
IN_A2
OSC
Current Level Set
Step Decoder
(Input Logic)
Chopper OSC
V
MR
Detect
STANDBY
V
CC
Voltage
Regulator
VCC
OSCM
VREF
Torque Control
2bit D/A
(Angle Control)
CR-CLK
Converter
Current Control
VM
Current Feedback
Output Control
(Mixed Decay Control)
R
S
COMP
RS_A1
RS_A2
RS_B1
RS_B2
Output
(H-Bridge ×2)
V
M
ISD/V
RS
V
MR
Detect
TS
Detection Circuit
Stepping Motor
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for
explanatory purposes.
Note: All the grounding wires of the TB67S521FTAG should run on the solder mask on the PCB and be
externally terminated at only one point. Also, a grounding method should be considered for efficient
heat dissipation. Careful attention should be paid to the layout of the output, V
M
and GND traces, to
avoid short circuits across output pins or to the power supply or ground. If such a short circuit occurs,
the device may be permanently damaged. Also, the utmost care should be taken for pattern designing
and implementation of the device since it has power supply pins (VM, RS_A1, RS_A2, RS_B1, RS_B2,
OUT_A1+, OUT_A2+, OUT_A1-, OUT_A2-, OUT_B1+, OUT_B2+, OUT_B1-, OUT_B2-, and GND)
through which a particularly large current may run. If these pins are wired incorrectly, an operation error
may occur or the device may be destroyed. The logic input pins must also be wired correctly. Otherwise,
the device may be damaged owing to a current running through the IC that is larger than the specified
current. Careful attention should be paid to design patterns and mountings.
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TB67S521FTAG
Pin Function Description
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Pin name
IN_B1
IN_B2
STANDBY
GND
NC
RS_A1 (Note)
RS_A2 (Note)
OUT_A1+ (Note)
OUT_A2+ (Note)
GND
OUT_A1- (Note)
OUT_A2- (Note)
GND
NC
GND
OUT_B2- (Note)
OUT_B1- (Note)
GND
OUT_B2+ (Note)
OUT_B1+ (Note)
RS_B2 (Note)
RS_B1 (Note)
VM
NC
VCC
NC
NC
NC
GND
VREF_B
VREF_A
OSCM
IN_A1
IN_A2
PHASE_A
PHASE_B
B ch step resolution control pin 1
Function
B ch step resolution control pin 2
All functions initialization and power saving mode (H: normal operation, L:
operation stop)
GND
Non-connection
Sense resistance connection pin for setting current value of A ch output
Sense resistance connection pin for setting current value of A ch output
A ch (+) output
A ch (+) output
A ch side power GND
A ch (-) output
A ch (-) output
A ch side power GND
Non-connection
B ch side power GND
B ch (-) output
B ch (-) output
B ch side power GND
B ch (+) output
B ch (+) output
Sense resistance connection pin for setting current value of B ch output
Sense resistance connection pin for setting current value of B ch output
Monitor pin of motor power supply
Non-connection
Monitor pin for internal generated 5V bias
Non-connection
Non-connection
Non-connection
GND
Bias pin for current value setting for B ch output
Bias pin for current value setting for A ch output
Oscillation circuit frequency setting pin for chopping
A ch step resolution control pin 1
A ch step resolution control pin 2
Signal input pin in direction of PWM current for A ch
Signal input pin in direction of PWM current for B ch
The NC pin should be used open.
Note: Connect the same function pins (numbered 1, 2) indicated as (Note) after the terminal name at near their
respective terminals
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TB67S521FTAG
Input/Output Equivalent Circuit
6, 7
21, 22
1, 2, 3,
1 kΩ
100 kΩ
33, 34, 35, 36
8, 9
19, 20
11, 12
16, 17
GND
GND
25
1 kΩ
30, 31
32
1 kΩ
500
Ω
GND
GND
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
Pin No
1
2
3
6,7
8,9
11,12
16,17
19,20
21,22
23
25
30
31
32
33
34
35
36
Pin name
IN_B1
IN_B2
STANDBY
RS_A1, RS_A2
OUT_A1+, OUT_A2+
OUT_A1-, OUT_A2-
OUT_B2-, OUT_B1-
OUT_B2+, OUT_B1+
RS_B2, RS_B1
VM
VCC
VREF_B
VREF_A
OSCM
IN_A1
IN_A2
PHASE_A
PHASE_B
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2016-12-13
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