Electronic Components Datasheet Search |
|
TLE4270-2 Datasheet(PDF) 9 Page - Infineon Technologies AG |
|
TLE4270-2 Datasheet(HTML) 9 Page - Infineon Technologies AG |
9 / 17 page TLE 4270-2 Data Sheet 9 Rev. 1.8, 2007-11-09 Design Notes for External Components An input capacitor C I is necessary for compensation of line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 Ω in series with C I. An output capacitor CQ is necessary for the stability of the regulating circuit. Stability is guaranteed at values of C Q ≥ 22 µF and an ESR of <3 Ω. Reset Circuitry If the output voltage decreases below 4.5 V, an external capacitor C D on pin 4 (D) will be discharged by the reset generator. If the voltage on this capacitor drops below V DL, a reset signal is generated on pin 2 (RO), i.e. reset output is set low. If the output voltage rises above the reset threshold, C D will be charged with constant current. After the power-on-reset time the voltage on the capacitor reaches V DU and the reset output will be set high again. The value of the power-on-reset time can be set within a wide range depending of the capacitance of C D. Reset Timing The power-on reset delay time is defined by the charging time of an external capacitor C D which can be calculated as follows: C D = (∆t × ID,c)/∆V (1) Definitions: • C D = delay capacitors • ∆t = reset delay time t rd • I D,c = charge current, typical 14 µA • ∆V = V DU, typical 1.8 V V DU = upper reset timing threshold at CD for reset delay time t rd = ∆V × CD/ID,c (2) The reset reaction time t rr is the time it takes the voltage regulator to set the reset out LOW after the output voltage has dropped below the reset threshold. It is typically 1 µs for delay capacitor of 47 nF. For other values for C D the reaction time can be estimated using the following equation: t rr ≈ 20 s/F × CD (3) |
Similar Part No. - TLE4270-2 |
|
Similar Description - TLE4270-2 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |