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SP6127EB Datasheet(PDF) 6 Page - Sipex Corporation |
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SP6127EB Datasheet(HTML) 6 Page - Sipex Corporation |
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6 / 8 page ![]() 6 R1 200k, 1% R2 SP6127 VFB RZ2 200k CZ2 130pF CP1 2pF Error Amplif ier Vref =0.6V Vout RZ CZ Figure 9- RZ and CZ in conjunction with internal compensation components form a Type-III compensation Loop Compensation for the SP6127EB L = 3.3uH, C = 22uF/5mOhm ceramic capacitor From equation (2) fESRZERO = 1.45MHz. From equation (3) fDBPOLE = 18.7 kHz. Since the condition specified in (1) is not met, Type-III compensation has to be used by adding external components RZ and CZ. Using equation (4) CZ is calculated 34pF (use 33pF). Following the guideline given in table 1, a 2kOhm RZ was used. |
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