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SI-7330A 数据表(PDF) 4 Page - Sanken electric

部件名 SI-7330A
功能描述  Unipolar Driver ICs
Download  5 Pages
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制造商  SANKEN [Sanken electric]
网页  http://www.sanken-ele.co.jp/en
标志 SANKEN - Sanken electric

SI-7330A 数据表(HTML) 4 Page - Sanken electric

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32
SI-7300A and SI-7330A
Application Note
s Thermal design
The procedures for the thermal design of the SI-7300A are
as follows:
(1) As shown in the right figure, the supply current ICC1 and
the output current lo are measured at the maximum
level of the supply voltage VCC1. However, the motor is
in holding mode at the 2-phase excitation.
(2) From the above measurements, the internal power dis-
sipation (2 phases) of the hybrid IC can be obtained
through the following formula.
Pdiss = VCC1 • ICC1 – 2Io2(RL + RS)
Where RL: coil resistance of the motor per phase
Shown in the lower graphs are sample calculations of
Pdiss vs. Io.
(3) The heatsink area corresponding to the ambient tem-
perature can be obtained from the SI-7300A derating
curve shown in the lower right.
(4) Verify that the temperature of the aluminum base plate
of the hybrid IC or adjacent heatsinks is below 85
°C
(equivalent to max. ambient temperature) when operat-
ing under actual conditions.
*
For details on thermal design, refer to the technical
data.
80
60
40
20
0
Ambient temperature Ta (°C)
0
4
8
12
16
20
24
28
SI-7300A Derating curve
No heatsink
100
×50
×2
100
×100
×2
SI-7300A
Aluminium heatsink
Using silicone grease
Unit : mm
SI-7330A Derating curve
SI-7300A
Aluminium heatsink
Using silicone grease
Unit : mm
0
5
10
15
20
25
30
80
60
40
20
0
Ambient temperature Ta (°C)
100
×
100
×
2
100
×50
×2
No heatsink
Excitation
signal input
(Active low)
TD62302P
(Toshiba)
(Open collector)
PD
VCC2
2.2 F
10V
+
1
2
3
4
16
15
14
13
10k
Rx
2SC2002
9
8
510
Ω×4
A
B
A
B
114
4
10
6
12
2
8
15
5
7
17
9
11
18 16
3 13
RSA RSB
ZD
VCC1
100 F
50V
IO
A
B
A
B
SPM
+
SI-7300A
Method for measuring current SI-7300A
A
ICC1
A
µ
µ
0
0.2 0.4 0.6 0.8
1.0 1.2 1.4
9
8
7
6
5
4
3
2
1
0
SI-7300A Heat dissipation per phase
vs. output current
Output current Io (A/ )
1
2
3
VCC1
1 40V
2 30V
3 20V
Motor
3.6
Ω/
9.0mH/
No load
Excitation signal
1-phase, holding
mode
16
14
12
10
8
6
4
2
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
SI-7330A Heat dissipation per phase
vs. output current
Condition
VCC2=5V
1-phase, holding
mode
Motor
Rm=0.85
Ω/
Lm=1.45mH/
Output current Io (A/ )
φ
φ
φ
φ
φ
φ


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