TB67S511FTAG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB67S511FTAG
Phase-in controlled Bipolar Stepping Motor Driver
The TB67S511FTAG is a two-phase bipolar stepping motor driver using a
PWM chopper. An interface is phase-in control.
Fabricated with the BiCD process, rating is 40 V/2.0 A.
Features
•
•
•
•
•
•
•
•
•
•
•
Monolithic IC integrated by BiCD process
Capable of controlling bipolar stepping motor by single IC
PWM controlled constant-current drive
Supporting full, half, and quarter step resolutions
P-WQFN36-0606-0.50-002
Weight: 0.10 g (typ.)
Built-in output MOSFET with low ON resistance (Upper + Lower side = 0.8
Ω
(typ.))
High voltage and current drive (For specifications, please refer to the absolute maximum ratings and the
operation ranges)
Built-in output functions of error detection (TSD and ISD) flags
Built-in error detection circuits (Thermal shutdown (TSD), over-current detection circuit (ISD), and power-on
reset (POR))
Built-in VCC regulator for internal circuit drive
Chopping frequency of a motor can be customized by external components
Package: P-WQFN36-0606-0.50-002
Note: Please be careful about thermal conditions during use.
©2016 TOSHIBA CORPORATION
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TB67S511FTAG
Pin assignment
OUT_B1+
27 26 25 24 23 22 21 20 19
NC 28
GND
VREF_B
VREF_A
OSCM
IN_A1
29
30
31
32
33
TB67S511FTAG
(Top View)
18 GND
17 OUT_B1-
16 OUT_B2-
15 GND
14 NC
13 GND
12 OUT_A2-
11
OUT_A1-
10 GND
1
IN_B1
2
IN_B2
3
STANDBY
4
GND
5
NC
6
RS_A1
7
RS_A2
8
OUT_A1+
9
OUT_A2+
IN_A2 34
PHASE_A 35
PHASE_B 36
*: Please mount the four-corner pins of the QFN package and the exposed pad to the GND area of the PCB.
OUT_B2+
RS_B1
RS_B2
VCC
NC
VM
NC
NC
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TB67S511FTAG
Block diagram
IN_A1
IN_A2
IN_B1
IN_B2
PHASE_A
PHASE_B
STANDBY
Standby
Control
+
Phase/Step
Selector
+
Signal Decode
Logic
OSC-Clock
Converter
System
Oscillator
Power-on
Reset
Motor
Oscillator
VCC
Regulator
OSCM
VCC
VM
Current
Level
Set
Current
Reference
Setting
VREF_A
VREF_B
Current
Comp
Predriver
RS_A*
Motor Control Logic
Current
Comp
Predriver
RS_B*
TSD
ISD
GND
OUT_A*+
OUT_A*-
OUT_B*+
OUT_B*-
Note: * means 1 or 2.
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory
purposes.
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TB67S511FTAG
Note:
All the grounding wires of the TB67S511FTAG 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.
Utmost care is necessary in the design of the output, VM, and GND lines since the IC may be destroyed by
short-circuiting between outputs, or by short-circuiting to the power supply or ground. Especially, if power supply
pins (VM, RS, OUT, and GND), through which a particularly large current may run, are wired incorrectly, an
operation error may occur or the device may be destroyed.
Also, if logic input pins are wired incorrectly, an operation error may occur or the device may be destroyed.
In this case, the IC may be destroyed because over rating current flows. Pay enough attention in designing
patterns and mounting the IC.
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TB67S511FTAG
Pin descriptions
Pin No.
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
RS_A2
OUT_A1+
OUT_A2+
GND
OUT_A1-
OUT_A2-
GND
NC
GND
OUT_B2-
OUT_B1-
GND
OUT_B2+
OUT_B1+
RS_B2
RS_B1
VM
NC
VCC
NC
NC
NC
GND
VREF_B
VREF_A
OSCM
IN_A1
IN_A2
PHASE_A
PHASE_B
Bch step resolution control 1
Bch step resolution control 2
Standby mode set pin
Ground pin
Non-connection pin
Sense resistor connection pin for setting current of Ach output
Sense resistor connection pin for setting current of Ach output
Motor Ach (+) output pin
Motor Ach (+) output pin
Power ground pin of Ach
Motor Ach (-) output pin
Motor Ach (-) output pin
Power ground pin of Ach
Non-connection pin
Power ground pin of Bch
Motor Bch (-) output pin
Motor Bch (-) output pin
Power ground pin of Bch
Motor Bch (+) output pin
Motor Bch (+) output pin
Sense resistor connection pin for setting current of Bch output
Sense resistor connection pin for setting current of Bch output
VM power supply pin
Non-connection pin
Internal VCC regulator monitor pin
Non-connection pin
Non-connection pin
Non-connection pin
Ground pin
Motor Bch current threshold set pin
Motor Ach current threshold set pin
Internal oscillator frequency set pin for chopping
Ach step resolution control 1
Ach step resolution control 2
Signal input pin of PWM current direction for Ach
Signal input pin of PWM current direction for Bch
Function
*: Please keep NC pins open.
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