 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC2914IGN-2 Datasheet(PDF) 9 Page - Linear Technology |
|
|
|||||||||||||||||||||||||||||
LTC2914IGN-2 Datasheet(HTML) 9 Page - Linear Technology |
|
|
9 / 16 page  LTC2914 9 2914f For positive supply monitoring, Vn is the desired nominal operating voltage, In is the desired nominal current through the resistive divider, VOV is the desired overvoltage trip point and VUV is the desired undervoltage trip point. For negative supply monitoring, to compensate for the 1V reference, 1V must be subtracted from Vn, VOV and VUV before using each in the following equations. 1. Choose RA to obtain the desired OV trip point RA is chosen to set the desired trip point for the overvoltage monitor. R V I V V A n n OV = 05 . • (1) 2. Choose RB to obtain the desired UV trip point Once RA is known, RB is chosen to set the desired trip point for the undervoltage monitor. R V I V V R B n n UV A = 05 . •– (2) 3. Choose RC to Complete the Design Once RA and RB are known, RC is determined by: R V I RR C n n AB = –– (3) If any of the variables Vn, In, VUV or VOV change, then each step must be recalculated. Positive Voltage Monitor Example A positive voltage monitor application is shown in Figure 3. The monitored voltage is a 5V ±10% supply. Nominal cur- rent in the resistive divider is 10µA. 1. Find RA to set the OV trip point of the monitor. R V µA V V k A =≈ 05 10 5 55 45 3 . • . . 2. Find RB to set the UV trip point of the monitor. R V µA V V kk B =≅ 05 10 5 45 45 3 10 2 . • . –. . 3. Determine RC to complete the design. R V µA kk k C =− ≈ 5 10 45 3 10 2 442 –. . Negative Voltage Monitor Example A negative voltage monitor application is shown in Figure 4. The monitored voltage is a –5V ±10% supply. Nominal current in the resistive divider is 10µA. For the negative case, 1V is subtracted from Vn, VOV and VUV. 1. Find RA to set the OV trip point of the monitor. R V µA VV VV k A =≈ 05 10 51 55 1 46 4 . • –– –. – . 2. Find RB to set the UV trip point of the monitor. R V µA VV VV kk B =− ≅ 05 10 51 45 1 46 4 8 45 . • – .– .. 3. Determine RC to complete the design. R VV µA kk k C =− − ≈ –– .. 51 10 46 4 8 45 549 APPLICATIO S I FOR ATIO VH1 RC 442k RB 10.2k RA 45.3k VCC GND LTC2914 VL1 2914 F03 OV UV SEL VCC 5V V1 5V ±10% Figure 3. Positive Supply Monitor REF RA 46.4k RB 8.45k RC 549k VCC GND V3 –5V ±10% LTC2914 VH3 VL3 2914 F04 OV UV SEL VCC 5V Figure 4. Negative Supply Monitor |
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
