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PT6210 Datasheet(PDF) 3 Page - Texas Instruments |
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PT6210 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 5 page Application Notes For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT6100/6210/6300 Series Adjusting the Output Voltage of Power Trends’ Wide Input Range Bus ISRs The output voltage of the Power Trends’ Wide Input Range Series ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor. Table 1 accordingly gives the allowable adjustment range for each model for either series as V a (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 12 (Vo adjust) and pins 5-8 (GND). Adjust Down: Add a resistor (R1), between pin 12 (Vo adjust) and pins 9-11(Vout). Figure 1 The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Refer to Figure 1 and Table 2 for both the placement and value of the required resistor; either (R1) or R2 as appropriate. Ro (Va – 1.25) (R1) = Vo – Va kΩ 1.25 Ro kΩ R2 = Va – Vo Where: Vo = Original output voltage Va = Adjusted output voltage Ro = The resistance value fromTable 1 Table 1 ISRADJUSTMENTRANGEANDFORMULAPARAMETERS 1Adc Rated PT6102 PT6101 PT6103 2Adc Rated PT6216 PT6213 PT6212 PT6214 3Adc Rated PT6314 PT6303 PT6302 PT6304 Vo (nom) 1.5 3.3 5.0 5.0 12.0 Va (min) 1.3 1.8 1.88 2.18 2.43 Va (max) 1.9 6.07 11.25 8.5 22.12 Ro (kΩ Ω Ω Ω Ω) 8.25 66.5 150.0 90.9 243.0 R2 Adjust Up C1 1 µF Ceramic (Optional) C2 100 µF (Req'd) Vo COM COM Vin + (R1) Adj Down PT6100/6200/6300 9,10,11 12 5,6,7,8 2,3,4 Vin Vo G N D Vo(adj) Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo adjust to either GND or Vout. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. Adjustments to the output voltage may place additional limits on the maximum and minimum input voltage for the part. The revised maximum and minimum input voltage limits must comply with the following requirements. The limits are model dependant. PT6216/PT6314: Vin (max) = (10 x Va)V or 17V, whichever is less. Vin (min) = 9.0V All other models: Vin (max) = (8 x Va)V or as specified. Vin (min) = (Va + 4)V or 9V, whichever is greater. |
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