Electronic Components Datasheet Search |
|
PT5806A Datasheet(PDF) 10 Page - Texas Instruments |
|
PT5806A Datasheet(HTML) 10 Page - Texas Instruments |
10 / 13 page Application Notes For technical support and more information, see inside back cover or visit www.ti.com Using the Margin Up/Down Controls on the PT5800 & PT5810 Regulator Series The PT5800 & PT5810 series of integrated switching regulator modules incorporate Margin Up* (pin 4) and Margin Dn* (pin 3) control inputs. These controls allow the output voltage set point to be momentarily adjusted 1, either up or down, by a nominal 5%. This provides a convenient method for dynamically testing the load circuit’s power supply voltage over its operating margin or range. Note that the ±5% change is also applied to any adjustment of the output voltage, if made, using the Vo Adjust (pin 1). The 5% adjustment is made by driving the appropriate margin control input directly to the ground reference at Sense(-) (pin 8) 2. An low-leakage open-drain device, such as a MOSFET or a p-channel JFET is recommended for this purpose. Adjustments of less than 5% can also be accom- modated by adding series resistors to the control inputs (See Figure 6-1). The value of the resistor can be selected from Table 6-1, or calculated using the following formula. Resistor Value Calculation To reduce the margin adjustment to something less than 5%, series padding resistors are required (See RD and RU in Figure 6-1). For the same amount of adjustment, the resistor value calculated for RU and RD will be the same. The formulas is as follows. RU/RD = 499 – 99.8 k Ω ∆% Where ∆% = The desired amount of margin adjust in percent. Notes: 1. The Margin Up* and Margin Dn* controls were not intended to be activated simultaneously. If they are their affects on the output voltage may not completely cancel, resulting in a slight shift in the output voltage set point. 2. When possible use the Sense(-) (pin 8) as the ground reference. This will produce a more accurate adjustment of the output voltage at the load circuit terminals. GND (pins 9-13) can be used if the Sense(-) pin is connected to GND near the regulator. C out + C in +5V GND MargDn L O A D Q 2 Sense(–) +V OUT GND PT5800 18 14–17 8 29–13 5, 6, 7 V OUT V IN GND SNS(+) SNS(–) INHIBIT* Q 1 4 3 MARG DN* MARG UP* + MargUp 0V +V o R D R U 0V Figure 6-1; Margin Up/Down Application Schematic Table 6-1; Margin Up/Down Resistor Values PADDING RESISTOR VALUES % Adjust RU / RD 5 0.0k Ω 4 24.9k Ω 3 66.5k Ω 2 150.0k Ω 1 397.0k Ω PT5800 & PT5810 Series |
Similar Part No. - PT5806A |
|
Similar Description - PT5806A |
|
|
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 |