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IC-DX Datasheet(PDF) 8 Page - IC-Haus GmbH |
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IC-DX Datasheet(HTML) 8 Page - IC-Haus GmbH |
8 / 10 page preliminary preliminary iC-DX UNIVERSAL DIGITAL SENSOR OUTPUT DRIVER Rev A3, Page 8/10 OUT IN NEP tpio ttrig() EN Figure 7: Timing diagram in push-pull operation mode 36V High Side Switch DIGITAL INPUT VREF REG & <150 C & CVB NEP EN 1μF CVOUT 100nF.. iC-DX 36V Low Side Switch + - OUT 5V IN GND VB GND VOUT OE ..30V VB Figure 8: Block diagram with EN and NEP internal signals CIRCUIT PROTECTION The iC-DX is reverse polarity protected via internal circutry. As far as the maximum voltage ratings are not exceeded, no possible supply combination at the line side pins (VB, GND and OUT) can damage the chip. Since the chip current consumption is relatively low, discharging of the backup capacitor C1 can be very slow, and injected charge through disturbances may in general result in capacitor voltage exceeding maxi- mum ratings, leading to malfunction or destruction of circuitry and associated parts. Thus EMC require- ments will afford more external circuitry. Figure 9 shows the iC-DX with the additional protective device D1, D2 and D3. Figure 9: Circuit schematic showing protective de- vices For over-voltage protection, the suppressor diodes D1,D2 and D3 absorbs transients on supply line in- jected externally on the cable. Clamp voltage of the diodes should be rated slightly above maximum speci- fied supply voltage. These currents can be passed to ground or to VB by the internal ESD diodes of the iC-DX. Whereas negative current injection will simply be drained off to ground, positive current injection will charge capacitor C1 further to higher voltages. If not suppressor diodes nor any other over-voltage protection is implemented, the backup capacitor C1 should be kept small. A typi- cal 100nF value is normally OK. Suggested protective devices At VBmax of 36V, suppressor diodes with a breakdown voltage from 36V has to be chosen in order to minimize the energie in iC-DX for higer Voltages. For example Diode type like Vishay GSOT36C or PJSD36W from Pan Jit should be enouch as protection. |
Similar Part No. - IC-DX_11 |
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Similar Description - IC-DX_11 |
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