 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
FPF2163 Datasheet(PDF) 10 Page - Fairchild Semiconductor |
|
||||||||||||||||||||||||||||||
FPF2163 Datasheet(HTML) 10 Page - Fairchild Semiconductor |
|
|
10 / 13 page  10 www.fairchildsemi.com FPF2163/4/5 Rev. D Application Information Typical Application OFF ON ON VIN GND FPF2163/4/5 ISET VOUT LOAD Battery 1.8V-5.5V C1 = 0.1µF RSET C2 = 0.1µF R2 = 499Ω FLAGB Setting Current Limit The FPF2163, FPF2164, and FPF2165 have a current limit which is set with an external resistor connected between ISET and GND. This resistor is selected by using the following equation, RSET is in Ohms and that of ILIM is Amps The table below can also be used to select RSET. A typical application would be the 500mA current that is required by a single USB port. Using the table below an appropriate selection for the RSET resistor would be 394Ω. This will ensure that the port load could draw 525mA, but not more than 875mA. Likewise for a dual port system, an RSET of 185Ω would always deliver at least 1125mA and never more than 1875mA Current Limit Various RSET Values Input Capacitor To limit the voltage drop on the input supply caused by transient in-rush currents when the switch is turned on into a discharged load capacitor or a short-circuit, a capacitor needs to be placed between VIN and GND. A 0.1uF ceramic capacitor, CIN, placed close to the pins is usually sufficient. Higher values of CIN can be used to further reduce the voltage drop. Output Capacitor A 0.1uF capacitor COUT, should be placed between VOUT and GND. This capacitor will prevent parasitic board inductances from forcing VOUT below GND when the switch turns-off. For the FPF2163 and FPF2164, the total output capacitance needs to be kept below a maximum value, COUT(max), to prevent the part from registering an over-current condition and turning-off the switch. The maximum output capacitance can be determined from the following formula, Power Dissipation During normal operation as a switch, the power dissipated in the part will depend upon the level at which the current limit is set. The maximum allowed setting for the current limit is 1.5A and this will result in a power dissipation of, If the part goes into current limit the maximum power dissipation will occur when the output is shorted to ground. For the FPF2163, the power dissipation will scale by the Auto-Restart Time, tRSTRT, and the Over Current Blanking Time, tBLANK, so that the maximum power dissipated is, RSET [Ω] Min. Current Limit [mA] Typ. Current Limit [mA] Max. Current Limit [mA] 185 1125 1500 1875 220 938 1250 1562 275 750 1000 1250 306 675 900 1125 345 600 800 1000 394 525 700 875 460 450 600 750 550 375 500 625 610 338 450 563 690 300 400 500 790 263 350 438 920 225 300 375 1100 188 250 313 1380 150 200 250 1830 113 150 188 (1) RSET = 275.6 ILIM (2) COUT(max) = ILIM(max) x tBLANK(min) VIN (3) P = (ILIM)2 x RDS = (1.5)2 x 0.12 = 270mW (4) P(max) = tBLANK tBLANK + tRSTRT x VIN(max) x ILIM(max) = 30 30 + 450 x 5.5 x 1.5 = 515.6mW |
Similar Part No. - FPF2163_07 |
|
Similar Description - FPF2163_07 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
