M56789 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC
부품명
상세내역
제조사
M56789 Datasheet PDF : 15 Pages
| |||
I/O terminal equivalent circuit
(7)CH1,2,3,4 power amplifier
OUTPUT terminal equivalent circuit
(VM1(+), VM1(-), VM2(+), VM2(-),
VM3(+), VM3(-), VM4(+), VM4(-), )
VCC2
Vm
VM(+,-)
GND
MITSUBISHI <CONTROL / DRIVER IC>
M56789FP
4 CHANNEL ACTUATOR DRIVER
The equivalent circuits of an output stage of the power amplifier
are shown in (7) .
The power supplies of CH1,CH2 are Vm1.
The power supply of CH3 is Vm3, and the power supply of CH4 is
Vm2.
The source side of the power amplifier output stage consists of a
PNP and a NPN. The emitta of the PNP is connected to VCC2. So
the power supplies of the PNP can be adjusted externally.
[About bootstrap advantage]
The output stage of the power amplifier consists of the preceding
components. If VCC2 is provided with higher voltage input than
Vm* (The recommendation voltage is Vm*+1V) externally, the
output range can be wider than that of VCC2=Vm*.
Please take advantage of this bootstrap function for the system
which has many power supplies. And it is the same with the
external bootstrap circuit which provides VCC2 with higher voltage
inputs than Vm*.
Also the bootstrap can decrease the saturation voltage at the
source side of the power amplifier output stage. Therefore, when
the outputs of the power amplifiers which drive motors and
actuators are fully swung, the power dissipation of the IC will be
decreased.
BASICALLY CHARACTERISTICS
Output saturation voltage and Load current characteristic.
This data is an example for typical sample.
BOOTSTRAP
CH1
Vm1=VCC1=5v,VCC2=12v
5.0
5.0
4.0
0.3v
VM1+,VM1-
4.0
3.0
3.0
2.0
2.0
0.5v
0.35v
VM1+
1.0
1.0
VM1-
0
0
0.2
0.4 0.5 0.6
0.8
1.0
Load Current (mA)
CH2
Vm1=VCC1=5v,VCC2=12v
0.3v
VM2+,VM2-
0.5v
VM2+
0.3v
VM2-
0.2
0.4 0.5 0.6
0.8
1.0
Load Current (mA)
CH3
Vm3=VCC1=5v,VCC2=12v
5.0
VM3+,VM3-
4.0
0.22v
0.46v
3.0
2.0
0.5v
1.0
0.24v
VM3+,VM3-
0
0.2
0.4 0.5 0.6
0.8
1.0
Load Current (mA)
CH4
Vm2=VCC1=5v,VCC2=12v
5.0
4.0
VM4+,VM4-
0.3v
3.0
0.6v
2.0
0.6v
0.3v
1.0
VM4+,VM4-
0
0.2
0.4 0.5 0.6
0.8
1.0
Load Current (mA)
Share Link: 