M56748FP Ver la hoja de datos (PDF) - MITSUBISHI ELECTRIC
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M56748FP Datasheet PDF : 5 Pages
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MITSUBISHI <CONTROL / DRIVER IC>
M56748FP
4-CHANNEL ACTUATOR MOTOR DRIVER
EXPLANATION OF OPERATION
1. The characteristics between Control voltage and Output voltage
CH1, CH2, CH4 AMP.
The input Amp. (Vctl terminal) consists of the Inverted Amp.
and the output (VM+, VM-) is amplified by the different voltage
between Vref and Vctl. The voltage gain of this input Amp. is
1 time.
Also, the output Amp. is the Master-Slave constitution. Each
of Master Amp. (VM+) and Slave Amp. (VM-) have the gain of
1.33 times and the output voltage refer to the about Vcc/2.
CH3 AMP.
The three terminals (Inverted, non-inverted and output) of
Input Amp. go to external pins. So, the Amp. constitution
(for example, Buffer Amp.) and the Gain can be adjusted
by the external resistors.
The output Amp., is the same with CH1, 2 and 4, is
consisted of the Master-Slave Amp. Each of the Master-
Amp. (VM+) and Slave Amp. (VM-) have the gain of 2.66
and the output voltage refer to the about Vcc/2.
Vref
+
+
Gain
Vctl
10kΩ 10kΩ
Input of inverted Amp.
(Gain=1)
Output of non-inverted Amp.
(Gain=1.33)
+
VM+
CH1
+
VM-
Output of inverted Amp.
(Gain=1.33)
Vref
+
Vctl+
+
Vctl-
Vctlout
Input Amp.
(sets gain externally)
Output of non-inverted Amp.
(Gain=2.66)
+
VM+
CH3
+
VM-
Output of inverted Amp.
(Gain=2.66)
CH1, 2, 4 Amp.
Vref
(2.5V)
Vctl
1V
CH3 Amp. (uses input Amp. as a Buffer Amp.)
Vref
(2.5V)
0.5V Vctl+
= Vcc/2
VM-
1.33V
1.33V
VM+
Gain= 2.66V
1V
= 2.66 TIMES
= 8.5 db
= Vcc/2
VM+
VM-
1.33V
1.33V
Gain= 2.66V
0.5V
= 5.32 TIMES
= 14.5 db
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