- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382711 > U690B Rear Wiper Interval/Wipe-Wash Control PDF資料下載
參數(shù)資料
| 型號： | U690B |
| 英文描述： | Rear Wiper Interval/Wipe-Wash Control |
| 中文描述： | 后雨刷間隔/擦，洗控制 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大小： | 102K |
| 代理商： | U690B |
U690B
TELEFUNKEN Semiconductors
Rev. A2, 28-Apr-97
3 (9)
Interference Voltages and Load-Dump,
Pins 3 and 4
Pin 3 (signal input) and Pin 4 (retrigger input) are pro-
tected against short interference peaks via the integrated
Z-diodes and external series resistance.
Relay Control Output, Pin 2
The relay control output is an open collector Darlington
circuit with an integrated 21-V Z-diode for limitation of
the inductive cut-off pulse of the relay coil. The maxi-
mum static collector current must not exceed 200 mA and
the saturation voltage is typically 1.0 V @ 100 mA,
whereas the typical resistive load is 80 .
Pin 2
+
21 V
94 8869
Figure 3. Relay control output
Oscillator, Pin 6
Oscillator frequency, f, is determined mainly by the R
2
C
2
circuit. The resistance, R
2
, determines the charge time,
and the integrated resistance (2 k ) is responsible for dis-
charge time. For the stability of the oscillator frequency,
it is recommended that the selected R
2
value be much
greater than the internal resistance (2 k ), because the
temperature response and the tolerances of the integrated
resistance are considerably greater than the external
resistance value.
Oscillator frequency, f, is calculated as follows:
f = 1/C
2
(0.632 R
2
+ 1900)
Minimum value for R
2
= 68 k
Maximum oscillator frequency is 20 kHz.
For further information, please refer to table 1, regarding
relationship between oscillator frequency and different
timings.
Rear Wiper Interval/Wipe-Wash Control,
Figures 1 and 4
A single high-side switch at terminal L is responsible for
all switching sequences. The water pump motor is con-
nected at terminal L and the wiper motor is connected at
terminal 53, as shown in figure 1.
Figure 4 shows three different modes of operation. The
input signal pulse width, t
p
, (see figure 1, terminal L)
determines the operation mode, with an assumed
oscillator frequency of f = 400 Hz. Pin 5 and Pin 7 are
open. As a debouncing measure, input pulses of t
p
less
than 50 ms do not activate the relay.
Further explanation is given with typical values. For
detailed information, please refer to table 1.
–
Interval mode: 50 ms
Pin 2 (relay control output) is activated for
640 ms,
where the interval pause, t
3
, is approximately 7 s.
t
p
610 ms
–
Wipe/wash mode: t
p
Dry wiping time is 4.4 s after the negative edge
of t
p
.
610 ms
–
Wipe/wash mode with retrigger
Retriggering for Large Park Segment
After dry wiping, the slip ring contact cuts off the supply
of the wiper motor and stops the wiper in its parking
position.
However due to mechanical tolerances, the contact may
pass over the park segment so that the wiper is switched
off by the relay. The wiper arm then stops at an undefined
position on the screen.
By retriggering the U690B prevents the wiper arm from
stopping anywhere other than its parking position. The
voltage of the relay contact is fed back to the retrigger
input which detects the negative switch off pulse (see
figure 4) and reactivates the wiper motor immediately for
approximately 640 ms. After another turn, the wiper is
switched off correctly via the slip ring contact.
The interval mode can be activated during the dry wiping
time, but the retriggering mode is switched-off during this
time.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| U7006B | U7006B [Updated 7/03. 12 Pages] DECT SiGe Front-end IC with High PAE |
| U810BS | Prescaler/Frequency Divider |
| U811BS | Output rail-to-rail micropower operational amplifiers |
| U812BS | Prescaler/Frequency Divider |
| U816BS-SP | General purpose input/output rail-to-rail low power operational amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U6939-C | 制造商:COILCRAFT 制造商全稱:Coilcraft lnc. 功能描述:Flyback Transformer |
| U6982- | 制造商:Coilcraft Inc 功能描述:Transformer, miniature, 3.3-5V, SMT, RoHS |
| U6982-CL | 制造商:Coilcraft Inc 功能描述:Transformer, miniature, 3.3-5V, SMT, RoHS |
| U6982-CLB | 制造商:Coilcraft Inc 功能描述:Transformer, miniature, 3.3-5V, SMT, RoHS |
| U6982-CLD | 制造商:Coilcraft Inc 功能描述:Transformer, miniature, 3.3-5V, SMT, RoHS |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。