ELMOS E910.47

BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
Analog multiplexer 8:1
Contact monitor 8 * to GND, par. out
Contact monitor 8 * to VBAT, par. out
Contact monitor 2 * 4, adj., par. out
Contact monitor 2 * 4, par. out
ÿ Non volatile contact monitor
Contact monitor 16 *, ser. out
ÿ Non volatile contact monitor
FEATURES
E910.47
DESCRIPTION
PINNING
ÿ
Supply voltage range VS 6.9V to 19V
The IC is designed for use in electric power window systems to
ÿ
On chip voltage clamping
store and display the status of a childproof lock function of the
ÿ
Under voltage reset
rear windows. The actual status is stored in three bits of the
ÿ
Charge pump to generate programming voltage
EEPROM whenever switch activity is detected. The redundant in-
ÿ
Redundant non - volatile memory
formation is checked periodically by a two out of three selection
ÿ
Periodical check of data consistency
and in case of one bit distinguishes from the others, the dominant
ÿ
Automatic data correction in case of inconsistency
information is stored in all three EEPROM cells again.
ÿ
Two I/Os to detect switch activation and
drive LEDs
To make sure that programming the memory is successful under
ÿ
– 40°C to + 85°C operating temperature
all supply voltage conditions, the energy is taken from an external
ÿ
SO8n package
capacitor once the programming cycle has started. The capacitor
PACKAGE
Pin
Name
Description
1
KISI
Output for status; low side driver
2
L1
Input and LED driver
3
VS
Supply voltage
4
TEST1
For test only; connect to GND
5
VDD
VDD output
6
TEST2
For test only; connect to GND
7
L0
Input and LED driver
8
GND
GND
KISI
1
8
L1
2
7
VS
3
6
TEST1
4
5
GND
L0
TEST2
VDD
is charged by an internal voltage regulator. Switch detection and
APPLICATION
ÿ
the start of the programming cycle are disabled by an undervolt-
Status IC for switches
age detection, while a programming cycle once started will always be completed.
Two I/O Pins are used for detecting switch activation as well as
driving the LEDs to display the status. An open drain low-side
driver output “KISI” is active when the rear window operation is
released.
Detection of a short to ground, an open load or an overload condition on KISI will be indicated by flashing the red LED with 2Hz.
BLOCK DIAGRAM
VBAT
VS
RED
GREEN
L0
int. Supply
VDD
L1
control
KISI
current
Limitation
Status E²
74
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication
has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of
the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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elmos product catalog june 2005
75