Electronic Components Datasheet Search |
|
PT5401N Datasheet(PDF) 9 Page - Texas Instruments |
|
PT5401N Datasheet(HTML) 9 Page - Texas Instruments |
9 / 16 page Application Notes For technical support and further information, visit http://power.ti.com PT5400 Series Adjusting the Output Voltage of the PT5400 Series of 6-A SWIFT Power Modules The output voltage of the PT5400 series of SWIFT power modules may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor. Table 4-1 gives the allowable adjustment range for each model of the series as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 5 (Vo adj) and pin 3 (GND). Adjust Down: Add a resistor (R1), between pin 5 (Vo adj) and pin 4 (Vout). Figure 4-1 The values of (R 1) [adjust down], and R2 [adjust up], can either be calculated using the following formulas, or may be looked up from the range of values in Table 4-2. Refer to Figure 4-1 for the placement of the required resistor; either (R 1) or R2 as appropriate. (R1) = Ro (Va – 0.891) – 18.2 k Ω Vo – Va R2 = 0.891 Ro – 18.2 k Ω Va – Vo Where: Vo = Original output voltage Va = Adjusted output voltage Ro = The resistance value from Table 4-1 Table 4-1 ISR OUTPUT VOLTAGE ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt. No. PT5401 PT5402 PT5408 PT5403 PT5404 PT5405 PT5406 PT5407 Input Bus 5 V 5 V 3.3 V 4 3.3/5 V 3.3/5 V 3.3/5 V 3.3/5 V 3.3/5 V Vo (nom) 3.3 V 2.5 V 2.5 V 2 V 1.8 V 1.5 V 1.2 V 1 V Va (min) 2.9 V 2.0 V 2.0 V 1.65 V 1.5 V 1.3 V 1.1 V 0.97 V Va (max) 3.5 V 2.95 V 2.5 V 4 2.45 V 2.25 V 1.95 V 1.65 V 1.45 V Ro (k Ω Ω Ω Ω Ω) 10.2 10.2 10.2 10.0 10.0 10.2 9.76 10.2 R2 Adjust Up C2 100 µF (Req'd) +V O COM COM +V IN + (R1) Adj Down PT5400 2 35 4 Vin V o Vo(adj) GND Notes: 1. Use a 1% (or better) tolerance resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo adj to either GND or Vout. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. For each model, adjustments to the output voltage may place additional limits on the minimum input voltage. The revised minimum input voltage must comply with the following requirement. Vin(min) = (Va + 1.1) V or as specified in the data sheet, whichever is greater. 4. The PT5408 operates only from a 3.3-V input bus. The limited input to output voltage differential of this model does not allow it to be adjusted higher than its trimmed output voltage. |
Similar Part No. - PT5401N |
|
Similar Description - PT5401N |
|
|
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 |