TB62208FTG
TOSHIBA BiCD Integrated Circuit
Silicon Monolithic
TB62208FTG
BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC
The TB62208FTG is a two-phase bipolar stepping motor
driver using a PWM chopper.
Fabricated with the BiCD process, the TB62208FTG 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.
Features
•
Bipolar stepping motor driver
•
PWM constant-current drive
•
Provides phase inputs to allow 2-phase and 1-2-phase excitation.
•
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: QFN48-P-0707-0.50
QFN48-P-0707-0.50
Weight: 0.14g (typ.)
Solderability
1.Use of Sn-37Pb solder bath
solder bath temperature = 230
°C
dipping time = 5 seconds
number of times = once
use of R-type flux
2.Use of Sn-3.0Ag-0.5Cu solder bath
solder bath temperature = 245
°C
dipping time = 5 seconds
number of times = once
use of R-type flux
1
2012-03-11
TB62208FTG
Block Diagram
OUT_B1
OUT_B2
26
Rs_B1
Vcc
Rs_B2
VM
NC
NC
NC
NC
36
35
NC
34
33
32
31
30
29
28
27
25
NC 37
NC 38
NC 39
Comparator
Comparator
Reg
NC
24 NC
23 NC
22 GND
Pre-driver
21 OUT_B1
20 OUT_B2
ISD
TSD
ISD
8
19 GND
18 GND
17 OUT_A2
16 OUT_A1
Control
GND 40
Vref_B 41
Vref_A 42
OSCM 43
43
NC 44
NC 45
Control
PHASE_A 46
PHASE_B 47
NC 48
1
1
NC
2
2
ENABLE_A
Comparator
3
3
ENABLE_B
4
4
STANDBY
5
5
GND
6
6
NC
7
Rs_A1
Pre-driver
15 GND
14 NC
13 NC
8
8
Rs_A2
9
9
NC
10
OUT_A1
11
11
OUT_A2
12
12
NC
In the block diagram, part of the functional blocks or constants may be omitted or simplified for explanatory purposes.
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2012-03-11
TB62208FTG
Pin Function
Pin
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
NC
No-connect
Function
Pin No
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Pin Name
NC
OUT_B2
OUT_B1
NC
Rs_B2
Rs_B1
NC
VM
NC
Vcc
NC
NC
NC
NC
NC
No-connect
B-phase positive driver output
No-connect
Power supply for the Phase-B motor coil;
sensing of the sink current
No-connect
Power supply
No-connect
Smoothing filter for logic power supply
No-connect
No-connect
No-connect
No-connect
No-connect
Function
ENABLE_A Phase-A enable
ENABLE_B Phase-B enable
STANDBY
H = Normal operation; L = Standby
Logic ground
No-connect
Power supply for the Phase-A motor coil;
sensing of the sink current
No-connect
Phase-A positive driver output
No-connect
No-connect
No-connect
Motor power ground
GND
NC
Rs_A1
Rs_A2
NC
OUT_A1
OUT_A2
NC
NC
NC
GND
OUT _ A1
OUT _ A 2
GND
GND
OUT _ B2
OUT _ B1
GND
NC
NC
17
18
19
20
21
22
23
24
Phase-A negative driver output
Motor power ground
Motor power ground
B-phase negative driver output
Motor power ground
No-connect
No-connect
40
41
42
43
44
45
46
47
48
GND
Vref_B
Vref_A
OSCM
NC
NC
PHASE_A
PHASE_B
NC
Logic ground
Tunes the current level for B-phase motor drive.
Tunes the current level for A-phase motor drive.
Oscillator pin for PWM choppers
No-connect
No-connect
Phase-A PWM current direction select
Phase-B PWM current direction select
No-connect
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2012-03-11
TB62208FTG
Pin Interfaces
150
Ω
100 kΩ
40 kΩ
2
3
4
41
42
40
34
60 kΩ
46 47
40
8
1 k
Ω
500
Ω
43
32
8 kΩ
3 k
Ω
3 k
Ω
10 16
7
11 17
40
15
18
29
32
8 kΩ
3 k
Ω
3 k
Ω
20 26
30
21 27
19
22
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
4
2012-03-11
TB62208FTG
Output Function Table
Pin name
STANDBY
PHASE
Pin Name
OUT(+)
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.
OUT(-)
OSC_M
L
H
State
H
H
X
X
H
L
X
L
H
H
OFF
OFF
H
L
OFF
OFF
L
H
a halt
oscillation
oscillation
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 TB62208FTG exits TSD mode and resumes normal operation when the TB62208FTG 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 TB62208FTG 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 short-circuit by temporarily disabling the device. Important notes on this
feature will be provided later.
.
(2)
(3)
5
2012-03-11
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