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參數(shù)資料
| 型號(hào)： | M56788FP |
| 廠(chǎng)商： | Mitsubishi Electric Corporation |
| 英文描述： | 5 CHANNEL ACTUATOR DRIVER |
| 中文描述： | 5頻道執(zhí)行器驅(qū)動(dòng) |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 292K |
| 代理商： | M56788FP |
5 CHANNEL ACTUATOR DRIVER
M56788FP
MITSUBISHI <CONTROL / DRIVER IC>
(VM1(+), VM1(-), VM2(+), VM2(-))
I/O terminal equivalent circuit
(7)CH1,CH2 power I/O terminal equivalent circuit
The equivalent circuits of an output stage of power amplifiers are
shown in(7) and(8) .
The power supplies of CH1, CH2 are Vm1.
And the power supplies of CH3, CH4, CH5 are Vm2.
The source side of the power amplifier output stage consists of a
PNP and a NPN.
In the case of the CH1 and CH2, the emitta of the PNP is
connected to VBS1, and in the case of the CH3, CH4 and CH5, it
is connected to VBS2. So the power supplies of the PNP can be
adjusted externally.
(VM3(+), VM3(-), VM4(+), VM4(-), VM5(+), VM5(-))
(8)CH3,CH4,CH5 power amplifier output terminal equivalent circuit
[About bootstrap advantage]
The output stage of the power amplifier consists of the preceding
components. If VBS* is provided with higher voltage input than
Vm*(The recommendationvoltage is Vm*+1V) externally, the
output range can be wider than that of VBS*=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 VBS* 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.
VBS2
GND
VM
Vm2
THERMAL DERATING
6.0
(W)
This IC's package is POWER-SSOP, so improving the board on
which the IC is mounted enables a large power dissipation without
a heat sink.
For example, using an 1 layer glass epoxy resin board, the IC's
power dissipation is 2.6W at least. And it comes to 3.6W by using
an improved 2 layer board.
The information of the N, P type board is shown in the board
information.
Ambient Temperature Ta(C)
P
0
25
50
75
100
125
150
(C)
1.0
2.0
3.0
4.0
5.0
3.6W using N-type board
VBS1
GND
VM
Vm1
2.6W using P-type board
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