IC-DI 반도체 회로 부품 판매점
DUAL SENSOR INTERFACE
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 IC-Haus |
iC-DI
DUAL SENSOR INTERFACE
FEATURES
o Dual channel switches, configurable for high-side, low-side
and push-pull operation
o Switches are current limited
o Push-pull operation with tristate function
o Output current of up to 100 mA per channel
o Parallel connection of both channels possible
o Channel 1 can be inverted (antivalent output)
o Wide supply voltage range of 9 to 30 V
o Sensor parameterisation via a feedback channel (up to 30 V)
o Switching converters and regulators for 3.3/5 V voltage
generation
o Error detection with hysteresis with excessive temperature,
overload and low voltage
o Driver shutdown in the event of error
o Error messaging via two open-collector outputs
Rev C2, Page 1/15
APPLICATIONS
o Sensor interface for light barriers
and proximity switches, for
example
PACKAGES
QFN24 4 mm x 4 mm
BLOCK DIAGRAM
CVH
1 uF
..50 mA
LVH
22 uH
VH
VHL
RSET
8.2 kΩ
ISET
VCC
VCC3
NUVD
NOVL
QCFG1
IN1
INV1
VCC3
VCC
Undervoltage
Overtemp.
Overload
HS1
LS1
VBR
VBO
QP1
QN1
QCFG2
IN2
OEN
GND
CFO
CFP
HS2
LS2
QP2
QN2
VN
VBR
CFI
=1
VN
LINE
1 nF
1 nF
Copyright © 2008 iC-Haus
http://www.ichaus.com
iC-DI
DUAL SENSOR INTERFACE
Rev C2, Page 2/15
DESCRIPTION
iC-DI is a monolithic interface iC with two inde-
pendent switching channels which enables digital
sensors to drive peripheral elements, such as pro-
grammable logic controllers (PLC) and relays, for ex-
ample.
The switches can be operated as push-pull, high-
side or low-side switches using inputs QCFG1 and
QCFG2 (open, high and low) and are enabled or dis-
abled via input OEN. They are designed to cope with
high driver currents of 100 mA (RSET = 8.2 kΩ), are
current limited and also short-circuit-proof in that they
shut down should excessive temperature or an over-
load occur. The output current limit can be set via an
external resistor at ISET.
NUVD (for low voltage at VBR or voltages VCC and
VCC3, generated internally). The output switches
are shut down with all types of error.
To avoid errors occurring when the device is switched
on the outputs remain at high impedance for ca.
50 ms after the low voltage threshold has been ex-
ceeded.
Sensor interface iC-DI has an integrated switching
converter which generates voltages VCC (5 V) and
VCC3 (3.3 V) with the aid of two back-end series-
regulators. If only a low current is required inductor
LVH may be omitted; the series regulators are then
powered directly by VBR.
The protective overload feature is included here as
an integrator so that capacitive loads with low repeat
rates can be switched without the protective circuitry
cutting in. In the event of excessive temperature an
error message is generated immediately.
Errors are signalled by two open-collector outputs:
NOVL (for excessive temperature and overloads) and
Input INV1 permits the input signal at channel 1 (IN1)
to be inverted.
The connected sensor can be parameterised using
the feedback channel with a high volt input (CFI →
CFO).
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IC-DI sensor
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