 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
VNQ830-E Datasheet(PDF) 11 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
VNQ830-E Datasheet(HTML) 11 Page - STMicroelectronics |
|
|
11 / 21 page  11/21 VNQ830-E Solution 2: A diode (DGND) in the ground line. A resistor (RGND=1kΩ) should be inserted in parallel to DGND if the device will be driving an inductive load. This small signal diode can be safely shared amongst several different HSD. Also in this case, the presence of the ground network will produce a shift (j600mV) in the input threshold and the status output values if the microprocessor ground is not common with the device ground. This shift will not vary if more than one HSD shares the same diode/resistor network. Series resistor in INPUT and STATUS lines are also required to prevent that, during battery voltage transient, the current exceeds the Absolute Maximum Rating. Safest configuration for unused INPUT and STATUS pin is to leave them unconnected. LOAD DUMP PROTECTION Dld is necessary (Voltage Transient Suppressor) if the load dump peak voltage exceeds VCC max DC rating. The same applies if the device will be subject to transients on the VCC line that are greater than the ones shown in the ISO T/R 7637/1 table. . µC I/Os PROTECTION: If a ground protection network is used and negative transients are present on the VCC line, the control pins will be pulled negative. ST suggests to insert a resistor (Rprot) in line to prevent the µC I/Os pins to latch-up. The value of these resistors is a compromise between the leakage current of µC and the current required by the HSD I/Os (Input levels compatibility) with the latch-up limit of µC I/Os. -VCCpeak/Ilatchup ≤ Rprot ≤ (VOHµC-VIH-VGND) / IIHmax Calculation example: For VCCpeak= - 100V and Ilatchup ≥ 20mA; VOHµC ≥ 4.5V 5k Ω ≤ Rprot ≤ 65kΩ. Recommended Rprot value is 10kΩ. OPEN LOAD DETECTION IN OFF STATE Off state open load detection requires an external pull-up resistor (RPU) connected between OUTPUT pin and a positive supply voltage (VPU) like the +5V line used to supply the microprocessor. The external resistor has to be selected according to the following requirements: 1) no false open load indication when load is connected: in this case we have to avoid VOUT to be higher than VOlmin; this results in the following condition VOUT=(VPU/(RL+RPU))RL<VOlmin. 2) no misdetection when load is disconnected: in this case the VOUT has to be higher than VOLmax; this results in the following condition RPU<(VPU–VOLmax)/ IL(off2). Because Is(OFF) may significantly increase if Vout is pulled high (up to several mA), the pull-up resistor RPU should be connected to a supply that is switched OFF when the module is in standby. The values of VOLmin, VOLmax and IL(off2) are available in the Electrical Characteristics section. Figure 9. Open Load detection in off state VOL V batt. VPU RPU RL R DRIVER + LOGIC + - INPUT STATUS VCC OUT GROUND IL(off2) |
Similar Part No. - VNQ830-E |
|
Similar Description - VNQ830-E |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
