iC-DI Dual Sensor Interface with 3.3 V/5 V Power Supply
15Pages

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 1/15 FEATURES © Dual channel switches, configurable for high-side, low-side and push-pull operation © Switches are current limited © Push-pull operation with tristate function © Output current of up to 100mA per channel © Parallel connection of both channels possible © Channel 1 can be inverted (antivalent output) © Wide supply voltage range of 9 to 30 V © Sensor parameterisation via a feedback channel (up to 30 V) © Switching converters and regulators for 3.3/5 V voltage generation © Error detection with hysteresis with excessive temperature, overload and low voltage © Driver shutdown in the event of error © Error messaging via two open-collector outputs APPLICATIONS © Sensor interface for light barriers and proximity switches, for example PACKAGES QFN24 4mmx 4mm BLOCK DIAGRAM =1 BIAS Overload CHANN. 2 CHANN. 1 Overtemp. Undervoltage QN2 QP2 VCC VH VHL ISET CFP CFO QCFG2 INV1 IN1 QCFG1 VCC VCC3 NOVL GND IN2 NUVD OEN 1 nF CFI VN VBR VN QN1 QP1 VBO VCC3 HS1 LS1 LS2 HS2 22 uH LVH ..50 mA RSET 1 uF CVH LINE Filter and Control Logic Filter and Control Logic 8.2 kW VBR 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 independent switching channels which enables digital sensors to drive peripheral elements, such as programmable logic controllers (PLC) and relays, for example. The switches can be operated as push-pull, highside or low-side switches using inputs QCFG1 and QCFG2 (open, high and low) and are enabled or disabled via input OEN. They are designed to cope with high driver currents of 100mA (RSET = 8.2 k ), are current limited and also short-circuit-proof in that they shut down should excessive...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 3/15 PACKAGES QFN24 4mm x 4mm to JEDEC Standard PIN CONFIGURATION QFN24 4mm x 4mm 7 8 9 10 11 1 2 3 4 5 13 14 15 22 21 6 12 16 17 20 19 18 24 23 DI code... ... PIN FUNCTIONS No. Name Function 1 ISET Reference Current for current limitation of driver outputs 2 INV1 Inverting Input Channel 1 3 IN1 Input Channel 1 PIN FUNCTIONS No. Name Function 4 QCFG1 Configuration Input Channel 1 5 QCFG2 Configuration Input Channel 2 6 IN2 Input Channel 2 7 OEN Output Enable Input 8 NOVL Overload Error Output 9 NUVD Undervoltage Error Output 10 CFO Output Feedback...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 4/15 ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Absolute Maximum Ratings are no Operating Conditions. Integrated circuits with system interfaces, e.g. via cable accessible pins (I/O pins, line drivers) are per principle endangered by injected interferences, which may compromise the function or durability. The robustness of the devices has to be verified by the user during system development with regards to applying standards and ensured where necessary by additional protective circuitry. By the...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 5/15 ABSOLUTE MAXIMUM RATINGS (cont’d) Item Symbol Parameter Conditions Unit No. Min. Max. G027 Ts Storage Temperature Range -40 150 °C THERMAL DATA Operating Conditions: VBO = 9...30 V, VBR = 9...30V (both referenced to VN), Tj = -40...125 °C, RSET = 8.2 k ±1%, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. T01 Ta Operating Ambient Temperature Range (extended range on request) -40 85 °C T02 Rthja Thermal Resistance Chip/Ambient Surface mounted, thermal pad soldered to ca. 2 cm² heat sink 30 40 K/W All voltages are...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 6/15 ELECTRICAL CHARACTERISTICS Operating Conditions: VBO = 9...30 V, VBR = 9...30 V (both referenced to VN), Tj = -40...125 °C, RSET = 8.2 k ±1%, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. Total Device 001 VBO Permissible Supply Voltage Referenced to VN 9 24 30 V 002 I(VBO) Supply Current in VBO No load, I(QP1) = I(QP2) = 0, HSx switched on 0.3 mA 003 VBR Permissible Supply Voltage 9 24 30 V 004 I(VBR) Supply Current in VBR VH connected to VBR, no load, I(VCC) = I(VCC3) = 0, V(OEN) = hi 6 mA 005 Vc()hi Clamp...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 7/15 ELECTRICAL CHARACTERISTICS Operating Conditions: VBO = 9...30 V, VBR = 9...30 V (both referenced to VN), Tj = -40...125 °C, RSET = 8.2 k ±1%, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. High-Side Switch QP1, QP2; V(QCFG1) = V(QCFG2) = 5V 201 Vs()hi Saturation Voltage hi vs. VBO RSET = 5.1 k ; I() = -100mA -1.2 V I() = -50mA -0.7 V I() = -10mA -0.3 V 202 Isc()hi Short-Circuit Current hi RSET = 8.2 k , V() = 0...VBO - 1.5 V -160 -125 -100 mA 203 Vol()on Overload Detection Threshold on QP1, QP2 hi ! lo;...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 8/15 ELECTRICAL CHARACTERISTICS Operating Conditions: VBO = 9...30 V, VBR = 9...30 V (both referenced to VN), Tj = -40...125 °C, RSET = 8.2 k ±1%, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. 608 Valo() Input Threshold lo at QCFG1, QCFG2 (V() < Va()lo ) QP1, QP2 tri-state) Referenced to VCC3 (see Fig. 3) 24 29 34 % 609 Valo()hys Hysteresis lo at QCFG1, QCFG2 (V() > Valo() + Valo()hys ) QN1, QN2 active) Referenced to VCC3 (see Fig. 3) 3 7 % 610 Vpp() Open Circuit Voltage at QCFG1, QCFG2 Referenced to VCC3 42 46.5 51...

iC-DI DUAL SENSOR INTERFACE Rev C2, Page 9/15 ELECTRICAL CHARACTERISTICS Operating Conditions: VBO = 9...30 V, VBR = 9...30 V (both referenced to VN), Tj = -40...125 °C, RSET = 8.2 k ±1%, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. 902 Ia(VHL) max. DC Cut-Off Current from VHL -200 mA 903 Va(VH) Cut-Off Voltage at VH Va(VH) > VHn 6.5 7.3 7.7 V 904 Va()hys Hysteresis at VH 10 25 150 mV 905 Vs(VHL) Saturation Voltage at VHL vs. VBR I(VHL) = -50mA 1.1 V I(VHL) = -150mA 3.0 V 906 Vf(VHL) Forward Voltage of Fly-Back Diode Vf() = V(GND) - V(VHL); I(VHL) = -50mA...