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U846B の電気的特性と機能

U846BのメーカーはTEMIC Semiconductorsです、この部品の機能は「Digital Wiper Control」です。


製品の詳細 ( Datasheet PDF )

部品番号 U846B
部品説明 Digital Wiper Control
メーカ TEMIC Semiconductors
ロゴ TEMIC Semiconductors ロゴ 




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U846B Datasheet, U846B PDF,ピン配置, 機能
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U846B
Digital Wiper Control for Intermittent and Wipe/ Wash Mode
Description
The U846B is a bipolar integrated circuit for automotive
use (“Rugged Silicon”) in interval and wipe/ wash control
of windshield or backlite wipers.
The interval pause can be set individually within a wide
range by using a potentiometer. Wipe / wash mode with
*dry wiping activated either for 2 wipes or for a certain
*time has priority over the interval mode.
The U846B is used in applications to control wiper
motors with or without park-switch signal feedback. The
integrated relay driver is protected against short circuits
and is switched to conductive condition in the case of a
load-dump. By using only a few external components,
protection against RF interference and ISO transients can
be achieved.
Features
D Interval input: high side
D Wipe/ wash input: high side
D Park input: low side (park position)
D Output driver protected against short circuits
D All time periods determined by an RC-oscillator
D Typical relay activation time of 500 ms
D Adjustable interval pause from 1.2 s to 27 s
D Typical pre-wipe delay of 100 ms
D Dry wiping
D – With park-switch signal: 2 cycles
D – Without park-switch signal typically 5.25 s
D Inputs INT, WASH and PARK digitally debounced
D All inputs with integrated RF protection
D Load-dump protection and interference protection
according to ISO 7637–1/4 (DIN 40839)
Application
Digital interval / wipe/ wash control for windshield or
backlite wiper motors with a 22-kW potentiometer
(typical value) for interval pause adjustment.
Recommended oscillator circuitry:
R6 = 36 kW ; C2 = 100 nF.
Ordering Information
Extended Type Number
U846B
U846B–FP
Package
DIP8
SO8
Remarks
Pin Description
Pin Symbol
Function
1 INT Interval input
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 C Oscillator C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 R Oscillator R
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4 PARK Park-switch input
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 WASH Wipe/wash input
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6 VS Supply voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7 GND Ground
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8 OUT Relay output
INT 1
8 OUT
C2
7 GND
U846B
R3
6 Vs
PARK 4
5
Figure 13. Pinning
WASH
12749
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97
1 (13)

1 Page





U846B pdf, ピン配列
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U846B
VBatt
47 m F
R1
180 W
C1 R5
87
OUT GND
47 kW
65
VS WASH
WASH
switch
U846B
INT C
12
R PARK
34
INT
switch R3
R2
2 kW
typ.22 kW
C2 R6 R4
100 nF 36 kW 10 kW
PARK
switch
11633
Figure 2. Basic circuitry
Table 1. Times
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSynchronized Times
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRelay activation time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInterval pause
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDry wiping
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPOR prolongation
Asynchronous Times
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebouncing time INT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁD Forward
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁD Reverse
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebouncing time WASH
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁD Forward
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁD Reverse
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebouncing time PARK
D Forward
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁD Reverse
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebouncing time SC
t1 = 160 1 / f0
t2 = 440 1 / fINT
t3 = 1680 1 / f0 or 2 wipes
tDPOR = 8 1 / f0
Typical Values with f0 = 320 Hz
t1 = 500 ms
t2 = 440 * 1 / fINT
t3 = 5.25 s or 2 wipes
tDPOR = 25 ms
tDINT = (32 +/– 4) 1 / f0
tDINR = (32 +/– 4) 1 / f0
tDINT = 100 ms
tDINR = 100 ms
tDWASH = (32 +/– 4) 1 / f0 tDWASH = 100 ms
tDWASHR = (32 +/– 4) 1 / f0 tDWASHR = 100 ms
tDPARK = (8 + 4) 1 / f0
tDPARKR = (8 + 4) 1 / f0
tDSC = (3 +/– 1) 1 / f0
tDPARK = 25 ms
tDPARKR = 25 ms
tDSC = 10 ms
For the calculation of “fINT”: see chapter “Functional Description” on page 4
ON
INT or WASH
OFF
123
CL
ON
OUT
OFF
IC >500 mA
SC
tDSC
tDtDWIAoNrSTHRR
Figure 3. Debouncing of the short circuit detection and reset of the latched short circuit detection
11708
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97
3 (13)


3Pages


U846B 電子部品, 半導体
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U846B
Relay
R1
180 W
R5
47 kW
8
1
R2
6.2 kW
765
U846B
234
C2 R6 R4
100 nF 36 kW 10 kW
C1
47 m F
10 V
S1
Park
switch
M
R3
S2 15 kW
OI
1/2
WIWA
M
31
Wiper motor
Interval switch
Water pump 15
Figure 6. Application circuit with park-switch feedback
11634
Interval Function without Park-Switch Feedback
This configuration is used mainly if the relay is mounted
directly to the wiper motor. The PARK input (Pin 4) can
be left open (internal pull-down resistor). During the relay
activation time, the motor current flows via the relay
contact. When the relay is switched off, the park-switch
takes over the current (see figure 7). The interval pause
starts at the end of the activation time of the relay (see
figure 8). If the INT switch is opened while the relay is
still energized, the wiper motor turns on until it reaches
its park position. The motor current flows via the park-
switch contact.
6 (13)
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97

6 Page



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部品番号部品説明メーカ
U846B

Digital Wiper Control

TEMIC Semiconductors
TEMIC Semiconductors


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