TB62214AFG/AFTG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB62214AFG, TB62214AFTG
BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC
The TB62214AFG/AFTG is a two-phase bipolar stepping motor
driver using a PWM chopper controlled by clock input.
Fabricated with the BiCD process, the TB62214AFG/AFTG is
rated at 40 V/2.0 A .
The on-chip voltage regulator allows control of a stepping motor
with a single V
M
power supply.
TB62214AFG
Features
•
Bipolar stepping motor driver
•
PWM constant-current drive
•
Clock input control
•
Allows two-phase, 1-2-phase and W1-2-phase excitations.
•
BiCD process: Uses DMOS FETs as output power transistors.
•
High voltage and current: 40 V/2.0 A (absolute maximum
•
•
ratings)
Thermal shutdown (TSD), overcurrent shutdown (ISD), and
power-on-resets (PORs)
Packages: HSOP28-P-0450-0.80
QFN48-P-0707-0.50
HSOP28-P-0450-0.80
TB62214AFTG
QFN48-P-0707-0.50
Weight
HSOP28-P-0450-0.80
:
0.79 g (typ.)
QFN48-P-0707-0.50
:
0.14 g (typ.)
© 2014 TOSHIBA Corporation
1
2014-10-01
TB62214AFG/AFTG
Pin Assignment
TB62214AFG
(HSOP28)
CW/CCW
MO_OUT
D_MODE_1
D_MODE_2
CLK
ENABLE
RESET
1
2
3
4
5
6
7
28
27
26
25
24
23
22
OSCM
Vref_A
Vref_B
NC
NC
Vcc
VM
FIN(GND)
FIN(GND)
RS_A
NC
OUT_A
NC
GND
OUT_A
GND
8
9
10
11
12
13
14
21
20
19
18
17
16
15
RS_B
NC
OUT_B
NC
GND
OUT_B
GND
2
2014-10-01
TB62214AFG/AFTG
Pin Assignment
TB62214AFTG
(
QFN48
)
OUT_B1
OUT_B2
RS_B1
RS_B2
V
CC
VM
NC
NC
NC
NC
NC
*
NC 37
NC 38
NC 39
GND 40
Vref_B 41
Vref_A 42
OSCM 43
CW/CCW 44
MO_OUT 45
D_MODE_1 46
D_MODE_2 47
NC 48
*
NC
36
35
34
33
32
31
30
29
28
27
26
25
*
24 NC
23 NC
22 GND
21
OUT_B1
20
OUT_B2
19 GND
18 GND
17
OUT_A2
16
OUT_A1
15 GND
14 NC
13 NC
1
NC
2
CLK
3
ENABLE
4
RESET
5
GND
6
NC
7
RS_A1
8
RS_A2
9
NC
10
OUT_A1
11
OUT_A2
12
NC
*
*Mark PAD: It must be connected to GND
3
2014-10-01
TB62214AFG/AFTG
Block Diagram
RESET
CW/CCW
ENABLE
D_MODE_1
D_MODE_2
CLK
Step Decoder
(Input Logic)
VMR
Detect
Vcc Voltage
Regulator
VM
MO_OUT
Vcc
Chopper OSC
OSCM
OSC
Vref
Current Level Set
CR-CLK
Converter
Current Feedback (×2)
VM
V
RS
R
S
COMP
Output Control
(Mixed Decay Control)
RS
ISD
ENABLE
TSD
Output
(H-Bridge×2)
VM
VMR
Detect
Detection Circuit
Stepping
Motor
In the block diagram, part of the functional blocks or constants may be omitted or simplified for explanatory
purposes.
Note: All the grounding wires of the TB62214AFG/AFTG 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, V
DD
(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 TB62214AFG/AFTG may be
permanently damaged.
Also, utmost care should be taken for pattern designing and implementation of the TB62214AFG/AFTG since it
has the power supply pins (V
M
, RS
_
A, RS_B, OUT_A,
OUT_A
, OUT_B,
OUT_B
, GND) particularly a large current
can run through. If these pins are wired incorrectly, an operation error or even worse a destruction of the
TB62214AFG/AFTG may occur.
The logic input pins must be correctly wired, too; otherwise, the TB62214AFG/AFTG may be damaged due to a
current larger than the specified current running through the IC.
Please note the above when designing and implementing IC patterns.
4
2014-10-01
TB62214AFG/AFTG
Pin Function
TB62214AFG
(HSOP28)
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
CW/CCW
MO_OUT
D_MODE_1
D_MODE_2
CLK
ENABLE
RESET
RS_A
NC
OUT_A
NC
GND
Motor rotation: forward/reverse
Electric angle monitor
Excitation mode control
Excitation mode control
An electrical angle leads on the rising edge of the clock input. A motor rotation
count depends on the input frequency.
A-/B-channel output enable
Electric angle reset
The sink current sensing of A-phase motor coil
No-connect
A-phase positive driver output
No-connect
Motor power ground
A-phase negative driver output
Motor power ground
Motor power ground
B-phase negative driver output
Motor power ground
No-connect
B-phase positive driver output
No-connect
The sink current sensing of B-phase motor coil
Power supply
Smoothing filter for logic power supply
No-connect
No-connect
Tunes the current level for B-phase motor drive.
Tunes the current level for A-phase motor drive.
Oscillator pin for PWM chopper
Function
OUT_A
GND
GND
OUT_B
GND
NC
OUT_B
NC
RS_B
VM
V
CC
NC
NC
Vref_B
Vref_A
OSCM
Pin Interfaces
(HSOP28)
8 21
150Ω
1
3
5
4
6
7
100kΩ
FIN
22
8kΩ
3kΩ
3kΩ
10
19
13
16
12
17
150Ω
2
100kΩ
26
27
1kΩ
23
1kΩ
28
500Ω
14
15
FIN
FIN
FIN
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for
explanatory purposes. Absolute precision of the chip internal resistance is +/-30%.
5
2014-10-01
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