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參數(shù)資料
| 型號： | LS7340 |
| 廠商： | LSI Corporation |
| 英文描述： | AUTO SHUT-OFF AC POWER SWITCH WITH PROGRAMMABLE TIMER |
| 中文描述： | 自動關(guān)機AC電源開關(guān)，具有可編程定時器 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大小： | 54K |
| 代理商： | LS7340 |
CAP (Pin 7)
The CAP input is for external component connection for the PLL fil-
ter capacitor. (See Figure 5.)
SYNC (Pin 8)
.
The AC Line Frequency (50/60Hz) is applied to this input. The
Phase-Lock Loop synchronizes all internal timings to the AC signal
at the SYNC input. (See Figure 5.)
NOTE 1:
ON will function as described if OFF is at logic 1.
If OFF is held at logic 0, the transitions at ON will
not cause the output to turn On.
NOTE 2
: OFF will function as described if ON is at logic 1.
If ON is held at logic 0, the transitions at OFF
will not cause the the output to turn Off.
Tw
Tw
FIGURE 2. OUTPUT CONDUCTION ANGLE,
SYNC
TRIG
7339/40-032499-2
ON
OFF
OFF
T
S1
T
D1
T
S1
T
S1
T
S1
T
S1
T
D1
<T
D1
OFF
OFF
159/STATE 1
159/STATE 1
159/STATE 1
T
D1 RESTART
OFF/STATE 0
FIGURE 3. PHASE ANGLE, , vs ON AND OFF
DIGITAL
COMPARATOR
DECODE
SYNC
PHASE-ANGLE
POINTER
PHASE-
LOCK
LOOP
CONTROL
LOGIC
BUF
BUF
BUF
SYNC
CAP
ON
OFF
V
SS
V
DD
FIGURE 4. LS7339/7340 BLOCK DIAGRAM
TRIG
OSC/TIMER
OSC
(+V)
(-V)
DRIVER
4
8
7
1
2
6
5
3
The information included herein is believed to be
accurate and reliable. However, LSI Computer Systems,
Inc. assumes no responsibilities for inaccuracies, nor for
any infringements of patent rights of others which may
result from its use.
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