TB62261FTG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB62261FTG
PHASE-in controlled Bipolar Stepping Motor Driver
The TB62261FTG 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/1.8 A .
FTG
Features
・BiCD
process integrated monolithic IC.
・Capable
of controlling 1 bipolar stepping motor.
・PWM
controlled constant-current drive.
・Allows
full, half, quarter step operation.
・Low
on-resistance (High + Low side = 0.8
Ω
(typ.)) MOSFET
output stage.
・High
voltage and current (For specification, please refer to absolute
maximum ratings and operation ranges)
・Error
detection (TSD/ISD) signal output function
・Built-in
error detection circuits (Thermal shutdown (TSD), over-current
shutdown (ISD), and power-on reset (POR))
・Built-in
VCC regulator for internal circuit use.
・Chopping
frequency of a motor can be customized by external resistor
and
capacitor
.
・Package
TB62261FTG: P-WQFN48-0707-0.50-003
Note: Please be careful about
thermal conditions during use.
P-WQFN48-0707-0.50-003
Weight: 0.10 g (typ.)
©2015 TOSHIBA CORPORATION
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2015-11-6
TB62261FTG
Pin assignment (TB62261FTG)
(Top View)
OUTB＋
OUTB＋
OUTA＋
VCC
RSB
RSB
VM
NC
NC
NC
NC
36 35 34 33 32 31 30 29 28 27 26 25
NC
NC
NC
GND
VREFB
VREFA
OSCM
INA1
INA2
PHASEA
PHASEB
NC
37
38
39
40
41
42
43
44
45
46
47
48
1
NC
2
INB1
3
INB2
4
STANDBY
5
GND
6
NC
7
RSA
8
RSA
9 10 11 12
OUTA＋
NC
NC
FTG
24 NC
23 NC
22 GND
21 OUTB－
20 OUTB－
19 GND
18 GND
17 OUTA－
16 OUTA－
15 GND
14 NC
13 NC
Please mount the four corner pins of the QFN package and the exposed pad to the GND area of the PCB.
NC
2
NC
2015-11-6
TB62261FTG
TB62261FTG Block diagram
INA1
INA2
INB1
INB2
PHASEA
PHASEB
STANDBY
Standby
Control
+
Phase/Step
Selector
+
Signal Decode
Logic
OSC-Clock
Converter
System
Oscillator
Power-on
Reset
Motor
Oscillator
VCC
Regulator
OSCM
VCC
VM
Curren
Level
Set
Current
Reference
Setting
VREFA
VREFB
Current
Comp
Motor Control Logic
Current
Comp
Predriver
RSA
TSD
Predriver
RSB
ISD
GND
OUTA+
OUTA-
OUTB+
OUTB-
Functional blocks/circuits/constants in the block chart etc. may be omitted or simplified for explanatory purposes.
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2015-11-6
TB62261FTG
Notes
All the grounding wires of the TB62261FTG must 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, VDD(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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2015-11-6
TB62261FTG
Pin explanations
TB62261FTG (QFN48)
Pin No.1 – 28
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
Pin Name
NC
INB1
INB2
STANDBY
GND
NC
RSA(*)
RSA(*)
NC
OUTA＋(*)
OUTA＋(*)
NC
NC
NC
GND
OUTA－(*)
OUTA－(*)
GND
GND
OUTB－(*)
OUTB－(*)
GND
NC
NC
NC
OUTB＋(*)
OUTB＋(*)
NC
Non-connection pin
Motor
Bch excitation control input 1
Motor
Bch excitation control input 2
Low power dissipation mode
Ground pin
Non-connection pin
Motor Ach current sense pin
Motor Ach current sense pin
Non-connection pin
Motor Ach (+) output pin
Motor Ach (+) output pin
Non-connection pin
Non-connection pin
Non-connection pin
Ground pin
Motor Ach (-) output pin
Motor Ach (-) output pin
Ground pin
Ground pin
Motor Bch (-) output pin
Motor Bch (-) output pin
Ground pin
Non-connection pin
Non-connection pin
Non-connection pin
Motor Bch (+) output pin
Motor Bch (+) output pin
Non-connection pin
Function
・Please
do not run patterns under NC pins.
*
:
Please connect the pins with the same pin name, while using the TB62261FTG.
5
2015-11-6
51单片机
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