 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TPS40322 Datasheet(PDF) 16 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
TPS40322 Datasheet(HTML) 16 Page - Texas Instruments |
|
|
16 / 47 page  æ ö æ ö + ´ ´ ç ÷ ç ÷ è ø è ø = RIPPLE OC CS LIM ILIM I I DCR A 2 R I R1 C1 L DCR 10 mA ILIM1 L1 VOUT1 SW1 UDG-11114 + R ILIM + OC ACS=15 CS1– CS1+ IOUT TPS40322 SLUSAF8E – JULY 2011 – REVISED JANUARY 2016 www.ti.com Feature Description (continued) 7.3.5 Overcurrent Protection The TPS40322 has dedicated ILIM pins for each channel for use when operating in dual-output mode. When operating in two-phase mode, both channels share the same overcurrent level set by ILIM1. The overcurrent level is set with a resistor connected from the ILIMx pin to analog ground. The sensed current signal is amplified by the CS amplifier with a gain of 15, and then compared with the established overcurrent level to determine if there is an OC fault. This design is shown in Figure 17. Figure 17. Overcurrent Protection Equation 3 is the current limit resistance (RLIM) calculation for desired overcurrent limit. where • IOC is the desired DC over current limit level • IRIPPLE is the inductor peak-peak ripple current • DCR is the inductor DC resistance • ACS is the current sensing amplifier gain (typically 15) • IILIM is the internal source current out of ILIMx pin (typically 10 µA) (3) The TPS40322 implements cycle-by-cycle current limit when the inductor peak current has exceeded the set limit. When the controller counts three consecutive clock cycles of an overcurrent condition, the high-side and low-side MOSFETs are turned off and the controller enters a hiccup mode. After six soft-start cycles, normal switching is attempted. If the overcurrent has cleared, normal operation resumes, otherwise the sequence repeats. 16 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated Product Folder Links: TPS40322 |
Similar Part No. - TPS40322_16 |
|
Similar Description - TPS40322_16 |
|
|
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
