TB62208FG
TOSHIBA BiCD Integrated Circuit
Silicon Monolithic
TB62208FG
BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC
The TB62208FG is a two-phase bipolar stepping motor
driver using a PWM chopper.
Fabricated with the BiCD process, the TB62208FG is rated
at 40 V/1.8 A.
The on-chip voltage regulator allows control of a stepping
motor with a single VM power supply.
HSOP28-P-0450-0.80
Features
•
Bipolar stepping motor driver
•
PWM constant-current drive
•
BiCD process: Uses DMOS FETs as output power transistors.
•
High voltage and current: 40 V/1.8 A
•
Thermal shutdown (TSD), over-current shutdown (ISD), and power-on-resets (PORs) for
VMR and VCCR
•
Package:
Heat-sink Small Outline Package (HSOP28-P-0450-0.80)
Weight: 0.79 g (typ.)
•
Provides phase-A and phase-B enable inputs to allow 2-phase and 1-2-phase excitation.
© 2014 TOSHIBA Corporation
1
2014-10-01
TB62208FG
Block Diagram
OUT_B
OUT_B
16
13
Vref_A
Vref_B
OSCM
PGND
FIN&LOGIC GND
28
27
26
25
24
23
22
21
20
19
18
17
15
½
Reg
Pre-driver
ISD
Comparator
TSD
Comparator
ISD
Control
Pre-driver
1
2
3
4
5
6
7
8
9
10
11
12
14
PHASE_A
NC
NC
NC
ENABLE_A
ENABLE_B
PHASE_B
RS_A
OUT_A
NC
PGND
In the block diagram, part of the functional blocks or constants may be omitted or simplified for explanatory purposes.
STANDBY
FIN&LOGIC GND
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2014-10-01
OUT_A
PGND
PGND
RS_B
VCC
VM
NC
NC
NC
NC
TB62208FG
Pin Function
Pin #
1
2
3
4
5
6
7
FIN
8
9
10
11
12
13
14
15
16
17
18
19
20
21
FIN
22
23
24
25
26
27
28
Pin Name
NC
NC
PHASE_A
PHASE_B
ENABLE_A
ENABLE_B
STANDBY
Function
No-connect
No-connect
Phase-A motor output current direction selector
Phase-B motor output current direction selector
Phase-A motor output enable SW
Phase-B motor output enable SW
5V:OUTPUT ON / GND:OUTPUT OFF
5V:OUTPUT ON / GND:OUTPUT OFF
Power-saving waiting mode SW pin with stopping OSCM and motor outputs
This fin is a heat sink which functions as logic GND.
This must be connected to GND line of board.
Power supply for the Phase-A motor output and sensing of the current
No-connect
Positive phase-A motor output
No-connect
Motor power ground
Negative phase-A motor output
Motor power ground
Motor power ground
Negative phase-B motor output
Motor power ground
No-connect
Positive phase-B motor output
No-connect
Power supply for the Phase-B motor output and sensing of the current
This fin is a heat sink which functions as logic GND.
This must be connected to GND line of board.
Power supply
Smoothing filter for internal 5V power supply
No-connect
No-connect
Tunes the current level for phase-B motor output
Tunes the current level for phase-A motor output
Tunes frequency of oscillator for chopping
FIN&Logic GND
RS_A
NC
OUT_A
NC
PGND
OUT_A
PGND
PGND
OUT_B
PGND
NC
OUT_B
NC
RS_B
FIN&Logic GND
VM
Vcc
NC
NC
Vref_B
Vref_A
OSCM
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2014-10-01
TB62208FG
Pin Interfaces
150
Ω
4
6
5
7
100 kΩ
40 kΩ
3
26
27
FIN
23
60 kΩ
FIN
8
1 kΩ
500
Ω
28
22
8 kΩ
3 kΩ
3 kΩ
21
10 13
FIN
19 16
12
17
14
15
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
4
2014-10-01
TB62208FG
Output Function Table
Pin name
STAND BY
PHASE
ENABLE
OUT(+)
OUT(-)
OSC_M
Function
Power-saving waiting SW
“L” : disable the OSCM and
Outputs.The motor can
not be operated
The determination pin of the
direction of motor current
“H” : Current flows into
OUT(-) from OUT(+)
The ON/FFF switch of
the output transistors
“L” :Output pins will be in a
high impedance state.
L
X
X
OFF
OFF
a halt
H
State
H
X
L
OFF
OFF
oscillation
H
H
H
L
oscillation
H
L
H
L
H
oscillation
X : Don't-care
Protection Features
(1)
Thermal shutdown (TSD)
The thermal shutdown circuit turns off all the outputs when the junction temperature (Tj) exceeds 150°C (typical).
The outputs retain the current states.
The TB62208FG exits TSD mode and resumes normal operation when the TB62208FG is rebooted or the
STANDBY
pin is changed from High to Low and then to High.
Power-on-resets (PORs) for VMR and VCCR (V
M
and V
CC
voltage monitor)
The outputs are forced off until V
M
and V
CC
reach the rated voltages.
Overcurrent shutdown (ISD)
Each phase has an overcurrent shutdown circuit, which turns off the corresponding outputs when the output
current exceeds the shutdown trip threshold (above the maximum current rating: 2.0 A minimum).
The TB62208FG exits ISD mode and resumes normal operation when the
STANDBY
pin is changed from High
to Low and then to High.
This circuit provides protection against a short-circuit by temporarily disabling the device. Important notes on this
feature will be provided later.
(2)
(3)
5
2014-10-01
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