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參數(shù)資料
| 型號： | AT5801 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 4-Channel driver + Power Controller |
| 中文描述： | 4通道驅(qū)動器電源控制器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 276K |
| 代理商： | AT5801 |
AT5801
Preliminary
4-Channel driver + Power Controller
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Email:
service@aimtron.com.tw
Tel: 886-3-575-3058
http://www.aimtron.com.tw
Fax: 886-3-575-3015 01/08/05
9
Application explanation
〈
H-bridge driver
〉
1.Mute function
Brake function and mute function are
assigned to CH1 and other channels of the
four channels respectively.
When the BRAKE pin is low is normal
operation (high is CH1 mute on),and enters
a brake mode.
When the MUTE2 pin is low is normal
operation (high is CH2 mute on).
When the MUTE34 pin is high is normal
operation (low is CH3,4 mute on).
2.VREF drop mute
When the voltage impressed to VREF terminal
is 1.0V (typ.) or less, impedance of driver
output becomes “high”.
3.Thermal shutdown
If the chip temperature rises above 150
℃
,then the thermal shutdown (TSD) circuit is
activated and the output current is cut. When
the chip temperature has dropped to 120
℃
,then output current begins to flow.
4.Driver gain
Driver input resistance is 10k
Ω
of CH1,
CH3,CH4 and input resistance of CH2 is 7.5k
Ω
.Driver gain can obtain under-mentioned
expression and set it.
The power supply of drive output stage is
HVcc terminal and that of pre-drive circuit is
VSYS2 terminal. Attach by-pass capacitor
(approximately 0.1
μ
F) to the leg of this IC
between the power supplies.
〈
DC/DC converter control circuit
〉
1.Output voltage
Booster circuit of voltage (VSYS1) can be
configured with external component. The
voltage is defined as follows.
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