TB62208FNG
TOSHIBA BiCD Integrated Circuit
Silicon Monolithic
TB62208FNG
BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC
The TB62208FNG is a two-phase bipolar stepping motor
driver using a PWM chopper.
Fabricated with the BiCD process, the TB62208FNG 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.
HTSSOP48-P-300-0.50
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: HTSSOP48-P-300-0.50 (with thermal pad at bottom)
Weight: 0.21g (typ.)
1
2011-01-28
TB62208FNG
Block Diagram
OUT_B1
OUT_B2
RS_B1
Vref_A
OUT_B1
RS_B2
Vref_B
OUT_B2
26
23
PGND
VCC
VM
NC
NC
NC
NC
NC
NC
NC
NC
NC
48
47
46
45
44
43
42
41
40
Reg
39
38
37
36
35
34
33
32
31
30
29
NC
28
27
25
Pre-driver
ISD
Comparator
TSD
Comparator
½
ISD
Control
Pre-driver
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
24
RS_A1
RS_A2
OUT_A2
STANDBY
PHASE_B
PHASE_A
ENABLE_A
ENABLE_B
OUT_A1
OUT_A1
OUT_A2
OSCM
LGND
NC
NC
NC
NC
NC
NC
NC
PGND
NC
In the block diagram, part of the functional blocks or constants may be omitted or simplified for explanatory purposes.
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2011-01-28
PGND
NC
PGND
LGND
NC
TB62208FNG
Pin Function
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin Name
OSCM
NC
NC
NC
PHASE_A
NC
PHASE_B
ENABLE_A
ENABLE_B
STANDBY
LGND
NC
R
S
_A1
R
S
_A2
NC
OUT_A1
OUT_A2
NC
NC
PGND
NC
OUT_A1
OUT_A2
PGND
Function
Oscillator pin for PWM choppers
No-connect
No-connect
No-connect
Phase-A PWM current direction select
No-connect
Phase-B PWM current direction select
Phase-A enable SW
Phase-B enable SW
ON:5V OFF: GND
ON:5V OFF: GND
Pin #
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin
Name
PGND
OUT_B2
OUT_B1
NC
PGND
NC
NC
OUT_B2
OUT_B1
NC
R
S
_B2
R
S
_B1
NC
NC
VM
NC
Vcc
NC
NC
NC
NC
LGND
Vref_B
Vref_A
Power GND
Function
Phase-B negative driver output 1
Phase-B negative driver output 2
No-connect
power GND
No-connect
No-connect
Phase-B positive driver output 2
Phase-B positive driver output 1
No-connect
Power supply for the Phase-B motor
coil; sensing of the sink current
No-connect
No-connect
VM reference monitor
No-connect
Smoothing filter for built-in 5V power
supply for logic
No-connect
No-connect
No-connect
No-connect
GND for low-voltage parts, such as logic
Tunes the current level for phase-B motor
drive by supplied bias
Tunes the current level for phase-A motor
drive by supplied bias
Power-saving waiting mode with OSCM
stopping and output disabling
GND for low-voltage parts, such as logic
No-connect
Power supply for the Phase-A motor coil;
sensing of the sink current
Power supply for the Phase-A motor coil;
sensing of the sink current
No-connect
Phase-A positive driver output
Phase-A positive driver output
No-connect
No-connect
Power GND
No-connect
Phase-A negative driver output
Phase-A negative driver output
Power GND
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2011-01-28
TB62208FNG
Pin Interfaces
150
Ω
100 kΩ
40 kΩ
47
11
46
48
5
7
9
8
10
41
60 kΩ
11
46
13
1 kΩ
500
Ω
39
8 kΩ
11
46
3 kΩ
3 kΩ
14
1
16 22
17 23
20
24
35
36
39
8 kΩ
3 kΩ
3 kΩ
32 27
33 26
20
24
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
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2011-01-28
TB62208FNG
Output Function Table
Pin name
STAND BY
PHASE
Pin Name
OUT(+)
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
Function
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 TB62208FNG exits TSD mode and resumes normal operation when the TB62208FNG 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 TB62208FNG 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)
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2011-01-28
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