TA7745P/PG/F/FG
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA7745P/PG, TA7745F/FG
3-Phase Full-Wave (Half-Wave) Brushless DC Motor Driver IC
Features
Three-phase, full-wave (and half-wave) driving
Voltage control system
Forward rotation, reverse rotation, and stop can be controlled
using only one pin
High efficiency is obtained.
Housed in a flat package (type F/FG only)
Operating voltage range
: V
CC
= 4.0 to 15 V
V
S
= 2 to 15 V
TA7745F/FG
TA7745P/PG
High sensitivity of position sensing inputs, having a hysteresis
: V
H
= 20 mV
p−p
(typ.)
Output current
: I
O
(max) = 1.0 A
Built-in thermal shutdown circuit
The TA7745PG/FG is a Pb-free product.
The following conditions apply to solderability:
*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
*the number of times = once
*use of R-type flux
Weight
DIP16−P−300−2.54A: 1.11 g (typ.)
SSOP16−P−225−1.00A: 0.14 g (typ.)
Block Diagram
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2006-3-2
TA7745P/PG/F/FG
Pin Function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
ℓa
H
a
+
H
a
−
H
b
+
H
b
−
H
c
+
H
c
−
CW/CCW
V
CC
L
c
GND
L
b
GND
L
a
ℓ
c
ℓ
b
Functional Description
a−phase Pre−drive stage output terminal
a−phase Hall Amp. positive input terminal
a−phase Hall Amp. negative input terminal
b−phase Hall Amp. positive input terminal
b−phase Hall Amp. negative input terminal
c−phase Hall Amp. positive input terminal
c−phase Hall Amp. negative input terminal
Forward rotation/reverse rotation switch terminal
Power Supply input terminal
c−phase drive output terminal
GND terminal
b−phase drive output terminal
GND terminal
a−phase drive output terminal
c−phase Pre−drive stage output terminal
b−phase Pre−drive stage output terminal
Function
FRS
((8) PIN)
Position Sensing Input
H
a
1
1
V
RVS
1
0
0
0
1
1
V
FWD
1
0
0
0
1
1
V
STOP
1
0
0
0
H
b
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
H
c
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
High impedance
L
a
H
H
M
L
L
M
L
L
M
H
H
M
Coil Output
L
b
L
M
H
H
M
L
H
M
L
L
M
H
L
c
M
L
L
M
H
H
M
H
H
M
L
L
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2006-3-2
TA7745P/PG/F/FG
Absolute Maximum Ratings
(Ta = 25°C)
Characteristics
Supply voltage
Symbol
V
CC
V
S
I
O
I
ℓ
TA7745P/PG
TA7745F/FG
Operating temperature
Storage temperature
T
opr
T
stg
Rating
18
18
1.0
20.0
350
P
D
550 (Note)
1200
−30
to 75
−55
to 150
°C
°C
mW
Unit
V
V
A
mA
Output current
Power dissipation
Note:
This rating is obtained by mounting on 20 × 20 × 0.8 mm PCB that occupied above 60% of copper area.
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TA7745P/PG/F/FG
Electrical Characteristics
(Unless otherwise specified, Ta = 25°C)
Characteristics
Symbol
I
CC1
Supply current
I
CC2
I
CC3
Saturation
voltage
L
a
, L
b
, L
c
Side
ℓ
a
,
ℓ
b
,
ℓ
c
Side
Position
sensing input
Sensitivity
Operating DC level
V
SL−1
V
SL−2
V
SU
V
H
CMR−H
V
F
V
FWD
V
STOP
V
RVS
∆V
S
I
L
I
F
= 1 A
Source current mode
No current flow
Sink current mode
I
O
= 200 mA
V = 18 V
(Note)
Test
Cir−
cuit
Test Condition
V
CC
= 5 V, Output “OPEN”
V
CC
= 9 V, Output “OPEN”
V
CC
= 12 V, Output “OPEN”
I
O
= 0.1 A
I
O
= 0.5 A
I
ℓ
= 1.0 mA
Min
0.5
0.6
0.7
―
―
―
―
1
―
3.9
1.8
0
―
―
Typ.
1
1.3
1.5
0.12
0.5
―
20
―
2.0
―
―
―
―
―
Max
3.0
3.5
5.0
0.3
1.0
0.2
―
V
CC−1.5
―
V
CC
2.6
0.9
50
50
mV
µA
V
mV
V
V
V
mA
Unit
Diode forward voltage
Forward
Rotation control
input voltage
Stop
Reverse
Saturation voltage differential
(L
a
, L
b
, L
c
Side)
Leakage current
Note:
The IC puts the motor in the stop mode even when pin 8 is open.
Applying V
FWD
to the pin puts the IC in the source mode. Applying V
RVS
puts the IC in the sink mode.
Applying V
STOP
prevents a current flow.
TA7745P/PG
TA7745F/FG
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2006-3-2
TA7745P/PG/F/FG
Application Circuit 1
(3 phase Bi−Pola drive)
TA7745P/PG/F/FG
I
o
≈
Rb
1 Rb
(
·
V IN -
V
+ VBE2 )
Ra Rc
R c R c BE1
≈
(K
1
·V
IN
)
+
K
2
(K
1
, K
2
= CONSTANT)
Application Circuit 2
(3 phase UNI−Pola drive)
TA7745P/PG/F/FG
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2006-3-2
