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PDF IL33197A Data sheet ( Hoja de datos )
| Número de pieza | IL33197A | |
| Descripción | Automotive Wash Wiper Timer | |
| Fabricantes | IK Semiconductor | |
| Logotipo |  |
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TECHNICAL DATA
Automotive Wash Wiper Timer
IL33197A
The IL33197A is a standard wiper timer control device designed for harsh
automotive applications. The device can perform the intermittent, after
wash, and continuous wiper timer functions. It is designed to directly drive
a wiper motor relay. The IL33197A requires very few external
components for full system implementation. The intermittent control pin
can be switched to ground or Vbat to meet a large variety of possible
applications. The intermittent timing can be fixed or adjustable via an
external resistor. The IL33197A is built using bipolar technology and
parametrically specified over the automotive ambient temperature range
and 8.0 to 16 V supply voltage. The IL33197A can operate in both front
and rear wiper applications.
• Adjustable Time Interval of Less Than 500 ms to More Than 30 s
• Intermittent Control Pin Can Be Switched to Ground or Vbat
• Adjustable After Wipe Time
• Priority to Continuous Wipe
• Minimum Number of Timing Components
• Integrated Relay Driver With Free Wheeling Protection Diode
• Operating Voltage Range From 8.0 to 16 V
• For Front Wiper and Rear Wiper Window Applications
ORDERING INFORMATION
IL33197AN
DIP
IL33197AN-01 DIP
IL33197AD
SOIC
IL33197AD-01 SOIC
TA = -45 to 105C (SOIC)
TA = -45 to 125C (DIP)
* Stresses beyond those listed under “absolute maximum ratings” may
cause permanent damage to the device.
These are stress ratings only and functional operation of the device at
these or any other conditions beyond those indicated under
“recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods
may affect device reliability.
January, 2011, Ver.01
1 page  
IL33197A
Figure 4. Switching Waveform W/W and INT Active
T1 Debounce Timing
The criteria for an input signal to be detected is that it should be active at two successive negative internal clock edges.
The inputs are sampled on the negative edge of the internal clock. If two consecutive samples are the same, the input is
detected as being in that state. Hence the time T1 from a signal becoming active to the time that the circuit responds can
be anytime from 4 x tb1 to 2 x 4 x tb1 (due to synchronizing the input to the oscillator period) when the oscillator is
oscillating with a time base of tb1 and 4 x tb2 to 2 x 4 x tb2, when the oscillator is oscillating with a time base of tb2.
The following table summarizes all T1 debounce timings:
Condition
INT Active
INT Inactive
W/W Active When INT Inactive
W/W Active When INT Active During T3
W/W Active When INT Active During T4
Debounce Time
4 x tb1 to 2 x 4 x tb1
4 x tb1 to 2 x 4 x tb1
4 x tb1 to 2 x 4 x tb1
4 x tb1 to 2 x 4 x tb1
4 x tb1 to 2 x 4 x tb2
Two IL33197A Devices Using One Decoupling Resistor and Capacitor
Two devices may be connected to the power source using a common R1 resistor for protection against overvoltages. If
this is done it should be noted that the current flowing through R1 is increased and hence the voltage drop across
R1 is increased.
Overvoltage Protection
In reference to the Block Diagram and Typical Application, all of the foregoing operational cases require:
R1 , C1 F
R3 , R4 , R5
The circuit will not operate during the transient conditions. By using the above component values, the circuit will
be able to sustain the following overvoltages on Vbb without permanent damage:
1. +28 V for 5 minutes
2. –15 V for 5 minutes
3. –16 V cycled off for 1.0 minute
4. +80 V pulse decaying exponentially to 8.0 V in 400 ms repeated 3 times at 1.0 minute intervals.
5. of 1.0 Joule.
6. 100 V pulse decaying exponentially to 10 V in 2 ms.
January, 2011, Ver.01
5 Page | ||
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| PDF Descargar | [ Datasheet IL33197A.PDF ] | |
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