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參數(shù)資料
| 型號： | PCA2000AA |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 32 kHz watch circuit with programmable adaptive motor pulse |
| 中文描述： | 32千赫的可編程自適應(yīng)脈沖馬達手表電路 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 120K |
| 代理商： | PCA2000AA |
2003 Dec 17
5
Philips Semiconductors
Product specification
32 kHz watch circuit with programmable
adaptive motor pulse
PCA2000; PCA2001
handbook, full pagewidth
43.75%
37.5%
50%
56.25%
62.5%
68.75%
75%
81.25%
100%
MGW351
0.244 ms
0.122 ms
0.98 ms
0.98 ms
0.98 ms
0.98 ms
Fig.4 Possible modulations for a 3.9 ms motor pulse.
Step detection
Figure 5 shows a simplified diagram of the motor driving
and step detection circuit, and Fig.6 shows the step
detection sequence and corresponding sampling current.
Betweenthemotordrivingpulses,theswitches P1 and P2
are closed, which means the motor is short-circuited. For
a pulse in one direction, P1 and N2 are open, and
P2 and N1 are closed with the appropriate duty cycle; for
a pulse in the opposite direction, P2 and N1 are open, and
P1 and N2 closed.
The step detection phase is initiated after the motor driving
pulse (see Fig.3). P1 and P2 are first closed for 0.98 ms
and then all four drive switches (P1, N1, P2 and N2) are
opened for 0.98 ms.
As a result, the energy stored in the motor inductance is
reduced as fast as possible.
The induced current caused by the residual motor
movement is then sampled in phase 3 (closing P3 and P2)
and in phase 4 (closing P1 and P4). For step detection in
the opposite direction P1 and P4 are closed during
phase 3 and P2 and P3 during phase 4 (see Fig.6).
The condition for a successful motor step is a positive step
detection pulse (current in the same direction as in the
driving phase) followed by a negative detection pulse
withinagiventimelimit.Thistimelimitcanbeprogrammed
between 3.9 and 10.7 ms (in steps of 0.98 ms) in order to
ensure a safe and correct step detection under all
conditions (for instance magnetic fields). The step
detection phase stops after the last 31.25 ms, after the
start of the motor driving pulse.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA2000CX8/5 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000CX8/5/1,025 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 32KHZ WATCH CIRCUIT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| PCA2000CX81 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000CX812 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000CX85 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
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