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參數(shù)資料
| 型號(hào)： | SG3731J |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 運(yùn)動(dòng)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(yè)數(shù)： | 4/5頁(yè) |
| 文件大?。?/td> | 140K |
| 代理商： | SG3731J |
SG1731/SG2731/SG3731
4/90 Rev 1.3 9/99
Copyright
1999
L
IN
F
IN
ITY
Microelectronics Inc.
Garden
Grove,
FAX: (714) 893-2570
11861 Western Avenue
∞
CA
92841
4
(714) 898-8121
∞
APPLICATION INFORMATION
(continued)
the lower threshold causes Output B to switch to the HIGH state.
If
±
V
is less than
±
8V then
±
V
can be obtained with resistors from
±
V
S
. If
±
V
S
is greater than
±
8V use zeners.
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.
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
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 -V
T
.
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|---|---|
| SG3731N | DC MOTOR PULSE WIDTH MODULATOR |
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| SG1731 | DC MOTOR PULSE WIDTH MODULATOR |
| SG1731J | DC MOTOR PULSE WIDTH MODULATOR |
| SG2842Y | CURRENT MODE PWM CONTROLLER |
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