Document
TB67S105FTG
Toshiba BiCD process integrated circuit silicon monolithic
TB67S105FTG
8bit Serial controlled bipolar stepping motor driver
The TB67S105FTG is a two phase bipolar stepping motor driver using a PWM chopper, controlled by 8 bit serial. Fabricated by the BiCD process, the TB67S105FTG is rated at 50V/3.0A. The internal voltage regulator allows to control the device with a single VM power supply.
FTG
P-WQFN48-0707-0.50-003
Weight: 0.1 g (Typ.)
Features
・BiCD process integrated monolithic IC. ・Capable of controlling one bipolar stepping motor. ・PWM controlled constant-current drive. ・Built-in serial-parallel convert circuit (8bit shift register) ・3-line (Data, Clock, Latch) serial output function for cascade connection ・Allows full, half step operation ・4 bit (16 steps) adjustable torque function (TRQ1,TRQ2,TRQ3,TRQ4). ・Low on-resistance (High + Low side=0.6Ω(typ.)) MOSFET output stage. ・High voltage and current (for specification, please refer to the absolute maximum ratings and operation ranges). ・Built-in error detection circuits (Thermal shutdown (TSD), over current shutdown (ISD), and power on reset(POR)). ・Built-in VCC regulator for internal use. ・Chopping frequency of a motor can be customized by external resistance and condenser.
・Package type: P-WQFN48-0707-0.50-003 Note) Please be careful about thermal conditions during use.
©2014 TOSHIBA CORPORATION
1
2014-10-20
Pin assignment
(Top View)
TB67S105FTG
NC L_OUT VCC NC VM NC RS_B RS_B NC OUT_B+ OUT_B+ NC
36 35 34 33 32 31 30 29 28 27 26 25
NC C_OUT D_OUT
37 38 39
24 NC 23 NC 22 GND
GND VREF_B VREF_A
OSCM
40 41 42 43
TB67S105FTG
21 OUT_B20 OUT_B19 GND 18 GND
NC 44 SI 45
SCK 46 RCK 47
NC 48
17 OUT_A16 OUT_A15 GND 14 NC 13 NC
1 2 3 4 5 6 7 8 9 10 11 12
NC SCLR-
GSTANDBY
GND NC
RS_A RS_A
NC OUT_A+ OUT_A+
NC
Please mount the four corner pins of the QFN package and the exposed pad to the GND area of the PCB.
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Block diagram
TB67S105FTG
SCK RCK SI GSCLR-
STANDBY
8bit shift register (Serial-Parallel Interface )
Main Control Logic
Oscillator (Motor) Internal oscillator
TSD ISD POR
C_OUT L_OUT D_OUT
OSCM GND
VREF_A VREF_B
Torque control
VREF Comp A
Bridge A NF level set
VREF Comp B
Bridge A NF level set
VCC_REG
RS CompA
Bridge A Predriver
Motor output stage Bridge A
RS CompB
Bridge B Predriver
Motor output stage Bridge B
VCC VM RS_A OUT_A+ OUT_A-
RS_B OUT_B+ OUT_B-
Functional blocks/circuits/constants in the block diagram may be omitted or simplified for explanatory purposes.
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TB67S105FTG
Application Notes
All the grounding wires of the TB67S105 must run on the solder mask on the PCB, and be externally connected at a single point. Also, the grounding method should be considered for efficient heat dissipation. Careful attention should be paid to the layout of the output, VM 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, OUT, 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.
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Pin explanations TB67S105FTG (QFN48)
Pin No.1 to 28
Pin No.
Pin Name
Function
1 NC Non-connection pin
2
SCLR-
Serial register clear pin (low active)
3 G- Serial data select pin (low active)
4 STANDBY Standby pin
5
GND
Ground pin
6 NC Non-connection pin
7
RS_A
Motor Ach current sense pin
8
RS_A
Motor Ach current sense pin
9 NC Non-connection pin
10
OUT_A+
Motor Ach (+) pin
11
OUT_A+
Motor Ach (+) pin
12 NC Non-connection pin
13 NC Non-connection pin
14 NC Non-connection pin
15
GND
Ground pin
16
OUT_A-
Motor Ach (-) pin
17
OUT_A-
Motor Ach (-) pin
18
GND
Ground pin
19
GND
Ground pin
20
OUT_B-
Motor Bch (-) pin
21
OUT_B-
Motor Bch (-) pin
22
GND
Ground pin
23 NC Non-connection pin
24 NC Non-connection pin
25 NC Non-connection pin
26
OUT_B+
Motor Bch (+) pin
27
OUT_B+
Motor Bch (+) pin
28 NC Non-connection pin
TB67S105FTG
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Pin No.29 to 48
Pin No.
Pin Name
Function
29
RS_B
Motor Bch current sense pin
30
RS_B
Motor Bch current sense pin
31 NC Non-connection pin
32 VM Motor power supply pin
33 NC Non-connection pin
34
VCC
Internal VCC regulator monitor pin
35
L_OUT
Serial ‘Latch’ output pin
36 NC Non-connection pin
37 NC Non-connection pin
38
C_OUT
Serial ‘Clock’ output pin
39
D_OUT
Shift register data output pin
40
GND
Ground pin
41
VREF_B
Motor Bch output current set pin
42
VREF_A
Motor Ach output current set pin
43
OSCM
Oscillating circuit frequency for PWM chopping set pin
4.