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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)： | 23/28頁 |
| 文件大?。?/td> | 618K |
| 代理商： | TB62300FG |
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TB62300FG
2005-04-04
23
Charge Pump Rise Time
t
ONG
: Time taken for capacitor Ccp 2 (charging capacitor) to fill up Ccp 1 (storing capacitor) to V
M
+
V
DD
after a reset is released.
The internal circuits cannot drive the gates correctly until the voltage of Ccp 1 reaches V
M
+
V
DD
.
Be sure to wait for t
ONG
or longer before driving the motors.
Basically, the larger the Ccp 1 capacitance is, the smaller the voltage fluctuation is, though the
initial charge up time is longer.
The smaller the Ccp 1 capacitance is, the shorter the initial charge-up time is, but the voltage
fluctuation is larger.
Depending on the combination of capacitors (especially with small capacitance), voltage may not be
sufficiently boosted. When the voltage does not increase sufficiently, R
ON
of output DMOS becomes
lower than the reference value, which raises the temperature.
Thus, use the capacitors under the capacitor combination conditions (Ccp 1
=
0.22
μ
F, Ccp 2
=
0.022
μ
F) recommended by Toshiba.
50%
V
DD
+
V
M
V
M
+
(V
DD
×
90%)
Ccp 1 voltage
V
M
5 V
0 V
STANDBY
t
ONG
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