 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
A3942 Datasheet(PDF) 11 Page - Allegro MicroSystems |
|
||||||||||||||||||||||||||||||
A3942 Datasheet(HTML) 11 Page - Allegro MicroSystems |
|
|
11 / 20 page  Quad High-Side Gate Driver for Automotive Applications A3942 11 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com on a channel-specific basis, according to the following table: D4 Setting Handling of Off-State Faults 0 Registered 1 Ignored D5 Read Enable Bit This bit enables or disables read- ing on the serial inputs, according to the following table: D5 Setting Handling of Serial Input 0 Ignored 1 Registered D6, D7 Address MSB and LSB Bits (Input and Out- put Fault registers) For channel-specific bits, these bits are used to specify which channel is indicated. The channel-specific bits are: Register Channel-Specific Bits Input D0, D1, D2, D3, D4 Output D0, D1, D2 These bits determine the channel, according to the fol- lowing table: D7 D6 Channel Selected 00 1 01 2 10 3 11 4 Output FAULT Register D0 Short-to-Ground (STG) Fault Bit The voltage from drain to source for each MOSFET is monitored. An internal current source sinks IDx from the Dx pins to set the VDS threshold for each channel, the level at which an STG fault condition is evaluated. The A3942 enables monitoring for an STG fault after the MOSFET is turned on and the turn-on blank time, tON, expires. (The MOSFET is turned on via the Input register D0 bit, ORed with the INx discrete input pin for the channel of the MOSFET, and tON is set by Input register D1 and D2 bits). If the MOSFET gate- to-source voltage exceeds the VDS threshold, then an STG fault will be registered for that channel, the MOSFET gate will be discharged, and the FAULTZ pin will be set low (active). An STG fault is latched until cleared (using the Input register D3 bit). In the meantime, the other channels can continue to operate normally. D1 Short to Battery (STB) Fault Bit When a chan- nel turns off, STB fault detection is blanked for tOFF. Subsequently, if the Sx pin voltage exceeds the VDS threshold voltage for that channel, an STB fault is latched. The output for that channel is disabled until the fault is either cleared (via the Input register D3 bit) or the off-state fault diagnostics are masked (via the Input register D4 bit). Because the output is disabled, there is no active pull-down during an STB event. Note that, in general, when the voltage on SX is high enough to trip the STB comparator, it also trips the OL comparator, and both the STB and the OL faults are latched. D2 Open Load (OL) Fault Bit When a channel turns off, the OL fault is blanked for tOFF. A small bias current, IOL, is sourced to the Sx pin of the channel. There it divides between RSx and the load. If the load is open, the Sx voltage will rise above the OL fault detection threshold. In that case, the output is disabled until the fault is cleared (via the Input register D3 bit) or the off-state fault diagnostics are masked (via the Input register D4 bit). D3 Thermal Warning Bit A die temperature monitor is integrated on the A3942 chip. If the die temperature |
Similar Part No. - A3942 |
|
Similar Description - A3942 |
|
|
|
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
