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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驅(qū)動器 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大小： | 618K |
| 代理商： | TB62300FG |
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TB62300FG
2005-04-04
24
External Capacitor for Charge Pump
When driving a motor while V
DD
=
5 V, f
chop
=
150 kHz, L
=
10 mH under the conditions of V
M
=
27 V and
2.0 A, the logical values for Ccp 1 and Ccp 2 are as shown in the graph below:
Choose Ccp 1 and Ccp 2 to be combined from the above applicable range. We recommend Ccp 1:Ccp 2 at
10:1 or more. (If our recommended values (Ccp
=
0.22
μ
F, Ccp 2
=
0.022
μ
F) are used, the drive conditions in
the specification sheet are satisfied. (There is no capacitor temperature characteristic as a condition.)
When setting the constants, make sure that the charge pump voltage is not below the specified value and
set the constants with a margin (the larger Ccp 1 and Ccp 2, the more the margin).
Some capacitors exhibit a large change in capacitance according to the temperature. Make sure the above
capacitance is obtained under the IC ambient temperature.
0.05
0
0
Recommended
value
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
0.05 0.1 0.15 0.2 0.25
0.35 0.4 0.45 0.5
0.3
Applicable range
Ccp 1 capacitance (
μ
F)
Ccp 1 – Ccp 2
C
μ
F
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