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參數資料
| 型號： | MC33187 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Long Duration Automotive Timer |
| 中文描述： | 時間長汽車計時器 |
| 文件頁數： | 4/7頁 |
| 文件大小： | 325K |
| 代理商： | MC33187 |
MC33187
MOTOROLA
4
MC33187
The circuit shown demonstrates the use of the timer to
provide a delay in turning the courtesy light off after the
vehicle doors are closed. The components are the same as
the defogger timer and Rt, Ct, Rs and Cs are as described in
the general description above, while Dz and Rin are
described in the description of the defogger timer. S1 to Sn
represent the doors switches which can be basically the
same as for a conventional system, except that only the relay
coil current and not the full lamp current passes through
them.
The operation of the circuit is as follows :
While one of the door switches is closed, the courtesy
light is on with the relay current flowing through the switch.
As soon as the last switch is opened, the energy stored in
the relay coil causes the common connection of the switches
to rise to the voltage permitted by the clamp consisting of Dz
(approximately 16V).
This provides a toggle input via Rin, causing the relay
output of the integrated circuit to go low, thus keeping the
relay energised for the period preset, with the direct
connection to Rin ensuring that any switch bounce or noise
during this period cannot cause toggle input to be detected.
Retriggering at the end of the timing period is prevented by
the built in the debounce timer.
Figure 2.
Courtesy Light Timer Operation
RC
GND
Relay
Toggle
Vcc
N / C
TS
N / C
Batt
Rs
Rt
Ct
Cs
S1
Sn
Rin
Dz
Batt
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關代理商/技術參數 |
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|---|---|
| MC33187 | 制造商:SPC Multicomp 功能描述:PTC Resettable Fuse |
| MC33187D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Long Duration Automotive Timer |
| MC33188 | 制造商:SPC Multicomp 功能描述:FUSE RESETTABLE SMD 0.2A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, SMD, 30V, 200MA 制造商:SPC Multicomp 功能描述:RESETTABLE FUSE 90V 0.17A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, 30V, 200mA, SMD; Holding Current:200mA; Tripping Current:400mA; Initial Resistance Max:5ohm; Operating Voltage:30V; PTC Fuse Case:SMD; MSL:MSL 2A - 4 weeks; External Depth:0.9mm; Initial Resistance Min:0.8ohm ;RoHS Compliant: Yes |
| MC33188 | 制造商:SPC Multicomp 功能描述:PTC Resettable Fuse |
| MC33189 | 制造商:SPC Multicomp 功能描述:FUSE RESETTABLE SMD 0.3A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, SMD, 60V, 300MA 制造商:SPC Multicomp 功能描述:RESETTABLE FUSE 60V 0.2A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, 60V, 300mA, SMD; Holding Current:300mA; Tripping Current:600mA; Initial Resistance Max:4.8ohm; Operating Voltage:60V; PTC Fuse Case:SMD; MSL:MSL 2A - 4 weeks; External Depth:1.15mm; Initial Resistance Min:1ohm ;RoHS Compliant: Yes |
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