參數(shù)資料
型號： TLE4726G
廠商： INFINEON TECHNOLOGIES AG
元件分類： 基準電壓源/電流源
英文描述： 2-Phase Stepper-Motor Driver
中文描述： 二相步進電機驅(qū)動器
文件頁數(shù)： 19/23頁
文件大小： 258K
代理商： TLE4726G
TLE 4726
Data Sheet
19
1999-09-15
Calculation of Power Dissipation
The total power dissipation
P
tot
is made up of
saturation losses
P
sat
quiescent losses
P
q
switching losses
P
s
The following equations give the power dissipation for chopper operation without phase
reversal. This is the worst case, because full current flows for the entire time and
switching losses occur in addition.
P
tot
= 2
×
P
sat
+
P
q
+ 2
×
P
s
where
P
sat
I
N
{
V
satl
×
d
+
V
Fu
(1 –
d
) +
V
satuC
×
d
+
V
satuD
(1 –
d
) }
(transistor saturation voltage and diode forward voltages),
(quiescent current times supply voltage) and
(turn-ON / turn-OFF operations).
P
q
=
I
q
×
V
S
+
I
L
×
V
L
I
N
I
q
i
D
i
R
t
p
t
ON
t
OFF
t
DON
t
DOFF
T
d
V
satl
V
satuC
= saturation voltage of source transistor (T1, T2) during charge cycle
V
satuD
= saturation voltage of source transistor (T1, T2) during discharge cycle
V
Fu
= forward voltage of free-wheeling diode (D1, D2)
V
S
= supply voltage
V
L
= logic supply voltage
I
L
= current from logic supply
= nominal current (mean value)
= quiescent current
= reverse current during turn-on delay
= peak reverse current
= conducting time of chopper transistor
= turn-ON time
= turn-OFF time
= turn-ON delay
= turn-OFF delay
= cycle duration
= duty cycle
t
p
/
T
= saturation voltage of sink transistor (T3, T4)
P
S
V
S
T
------
i
---------------------
t
2
i
-----------------------------
i
+
t
×
4
I
N
2
----
t
DOFF
t
OFF
+
+
+
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TLE4726G_08 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:2-Phase Stepper-Motor Driver
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