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參數(shù)資料
| 型號： | SG1731J/883B |
| 廠商： | MICROSEMI CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | DC MOTOR PULSE WIDTH MODULATOR |
| 中文描述： | BRUSH DC MOTOR CONTROLLER, 0.4 A, CDIP16 |
| 封裝： | CERAMIC, DIP-16 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 250K |
| 代理商： | SG1731J/883B |
SG1731/SG2731/SG3731
Rev 1.3a
Copyright
1999
11861
Western
Avenue
∞
Garden
Grove,
CA
92841
4
(714) 898-8121
∞
FAX: (714) 893-2570
APPLICATION INFORMATION (continued)
APPLICATION CIRCUITS
FIGURE 2 - PULSE WIDTH MODULATION WITH NO DEADBAND
FIGURE 4
FIGURE 3
In this simple battery-powered position servo, the control supply
and driver supply are both single-ended positive with respect to
ground.
A high torque position servo is obtained by buffering the output
drivers to obtain higher output current.
the lower threshold causes Output B to switch to the HIGH state.
If
±V
S is less than±8V then ±VT can be obtained with resistors from
±V
S.
If
±V
S is greater than ±8V use zeners.
Threshold crossings are generated by shifting the triangle
waveform up and down with the error voltage (Pin 5). A positive
error voltage will result in a pulse width modulated output at
Driver A (Pin 13). Similarly, a negative error voltage produces a
pulse train at Driver B (Pin 12). Figure 2 illustrates this process
for the case where V
+ is greater than V
T.
It is important to note that the triangle shifting circuit also
attenuates the waveform seen at C
T by a factor of 2. This results
in a waveform at the PWM comparators with a positive peak of
V
+ and a negative peak of V-, and must be taken into account
when selecting the values for +V
T and -VT.
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