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參數(shù)資料
| 型號： | PCA1461U |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 32 kHz watch circuits with adaptive motor pulse |
| 中文描述： | STEPPING MOTOR WATCH, UUC8 |
| 封裝： | DIE-8 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 132K |
| 代理商： | PCA1461U |
1998 Apr 21
7
Philips Semiconductors
Product specification
32 kHz watch circuits with adaptive motor
pulse
PCA146x series
Voltage level detector
The supply voltage is compared with the internal voltage
reference V
LIT
and V
EOL
every minute. The first voltage
level detection is carried out 30 ms after RESET.
When a lithium voltage level is detected (V
DD
≥
V
LIT
), the
circuit starts operating in the lithium mode (Fig.4).
When the detected V
DD
voltage level is between V
LIT
and
V
EOL
, the circuit operates in the silver-oxide mode (Fig.3).
If the battery end-of-life is detected (V
DD
< V
EOL
), the
detection and stage control is switched OFF and the
waveform produced is an unchopped version of the
stage 8 waveform. To indicate this condition the waveform
is produced in bursts of 4 pulses every 4 s.
Detection of motor movement
After a motor pulse, the motor is short-circuited to V
DD
for
1 ms. Afterwards the energy in the motor inductor will be
dissipated to measure only the current generated by the
induced motor voltage. During the time t
DI
(dissipation of
energy time) all switches shown in Fig.5 are open to
reduce the current as fast as possible. The current will now
flow through the diodes D3 and D2, or D4 and D1. Then
the first of 52 possible measurement cycles (t
MC
) starts to
measure the induced current.
Fig.5 Motor driving and detecting circuit.
MSA941
VDD
VSS
MOTOR
M1
M2
N1
D3
P1
D1
L1
L2
N2
D4
P2
D2
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相關代理商/技術參數(shù) |
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|---|---|
| PCA1461U/10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
| PCA1462 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
| PCA1462U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
| PCA1462U/10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
| PCA1462U/7 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
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