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SI-7115B 数据表(PDF) 3 Page - Sanken electric

部件名 SI-7115B
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-7115B 数据表(HTML) 3 Page - Sanken electric

  SI-7115B Datasheet HTML 1Page - Sanken electric SI-7115B Datasheet HTML 2Page - Sanken electric SI-7115B Datasheet HTML 3Page - Sanken electric SI-7115B Datasheet HTML 4Page - Sanken electric SI-7115B Datasheet HTML 5Page - Sanken electric  
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35
SI-7115B
s Thermal design
In SI-7115B, the avalanche diode of the phase-switching
transistor is operated in breakdown condition and the en-
ergy built up in the inductance of the motor coil is dissipated
as heat of the transistor. Hence, when the motor rotates,
the internal heat dissipation increases compared with when
the motor is stopped.
Therefore, the internal heat dissipation of 7115B can be
computed from the data taken with actual load through the
following procedures.
(1) Vary the rotation speed of the motor within the actual
operating range in a circuit under actual load conditions
and measure the supply current ICC and the correspond-
ing output current IO1 and IO2.
(2) Obtain the internal power dissipation Pdiss (4-phase) of
7115B through the following formula.
Pdiss = VCC•ICC – (IO12 + IO22)•RL
The figure below shows the relationship between frequency
(PPS) and ICC, Pdiss, and case temperature TC.
SI-7115B
Torque characteristics
2-phase
excitation
1-2 phase excitation
50
100
500
1000
5000
Frequency (PPS)
Motor
103G–775–1240
VCC=24V
IO = 1.0A/
0
1.0
2.0
φ
50
100
500
1000
5000
Frequency (PPS)
5.0
4.0
3.0
2.0
1.0
0
Motor KP6M2-001
VCC=24V
IO = 1.0A/
SI-7115B
Torque characteristics
2-phase excitation
φ
8
13
10
15
1
2
4
5
3
17
6
7
9
14
16
11
12
A
B
A
B
Excitation
signals
F
2.2
10V
+
Rx
b
a
AA
B
B
IO1
IO2
A
A
A
VCC
ICC
Method for measuring current
(circuit under actual load conditions)
15
SI-7115B
Stepper motor
µ
SI-7115B Frequency vs. Supply current, Internal power
dissipation and Case temperature (Example)
Power down circuit
RY
RX
Power down Transistor TR
2
4
5
3
SI-7115B
1500
1000
500
0
Frequency (PPS)
0
0
0
50
10
1
100
20
2
ICC Supply current
Pdiss = VCC • ICC
-RL (IO12 + IO22)
TC Temperature of heatsink
adjacent to SI-7115B
ICC
VCC
A
A
A
SI
7115B
AB AB
I01
I02
M
Motor : 23 PM-C109 no load
VCC = 24V
IO
= 1.0A/
2-phase excitation
Heatsink 100 x 100 x 2A
Ta = 25°C
Pdiss
ICC
max
φ
TC
Application Note
s Power down mode
The SI-7115B can be operated in power down mode. The
circuit is shown below.
As shown in the figure,
when the power down tran-
sistor is switched on, (Ry
is power down resistor)
RX/RY becomes a current
fixing resistance and the
current during power down
mode can be obtained by
substituting this resistance
to RX in the previous Fig.
A.
s Example of Frequency vs.
Torque characteristics
The following two graphs show the relationship between
frequency (pps) and pull-out torque (kg - cm) of SI-7115B
when used with two types of motor.


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