參數(shù)資料
型號： TB62300FG
廠商： Toshiba Corporation
英文描述： Dual Full-Bridge Driver for DC Motor
中文描述： 雙路全橋式直流電動機(jī)驅(qū)動器
文件頁數(shù)： 22/28頁
文件大?。?/td> 618K
代理商： TB62300FG
TB62300FG
2005-04-04
22
Operation of Charge Pump Circuit
Initial charging
(1)
When RESET is released, T
r1
is turned on and T
r2
turned off. Ccp 2 is charged from V
M
via Di1.
(2)
After T
r1
is turned off and T
r2
is turned on, and Ccp 1 is charged from Ccp 2 via Di2.
(3)
When the voltage difference between V
M
and V
H
(Ccp A pin voltage
=
charge pump voltage)
reaches V
DD
or higher, operation halts (in the steady-state phase).
Actual operation
(4)
The charge of Ccp 1 charge is used at f
chop
switching and the potential of V
H
drops.
(5)
The circuit is charged up by the operations of (1) and (2) above.
Output switching
Initial charging
Steady-state phase
(1)
(2)
(3)
(4)
t
(5)
(4)
(5)
V
H
V
M
V
H
=
V
M
+
V
DD
=
charge pump voltage
i1
=
charge pump current
i2
=
gate block power dissipation
V
DD
=
5 V
V
M
=
24 V
Comparator
and
Controller
V
M
Output
Output
H switch
i2
Ccp 1
0.22
μ
F
Ccp A
Ccp B
Ccp C
R
1
V
H
R
S
R
RS
Ccp 2
0.022
μ
F
Di2
Di1
Di3
V
z
i1
(2)
T
r1
T
r2
7
(1)
(2)
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