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PQ60025EGw20xyS Datasheet(PDF) 11 Page - SynQor Worldwide Headquarters |
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PQ60025EGw20xyS Datasheet(HTML) 11 Page - SynQor Worldwide Headquarters |
11 / 13 page Product # PQ60015EGL20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2EG651G Rev. B 1/22/08 Page 11 Input: Input: Output: Output: Current: Current: PPackage: ackage: 35-75 V 35-75 V 1.5 V 1.5 V 20 A 20 A Eighth-brick Eighth-brick T Technical S echnical Specification pecification APPLICATION CONSIDERATIONS Input System Instability: This condition can occur because any DC/DC converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure D provides a typical circuit dia- gram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure E pro- vides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external elec- trolytic input capacitor. The recommended external input capac- itance is specified in the “Input Characteristics” section. More detailed information is available in the application note titled “EMI Characteristics” on the SynQor website. Vin External Input Filter Trim Vin(+) Iload Cload L C Vout(+) Rtrim-up or Rtrim-down Vsense(+) ON/OFF Vin(_) Vin(+) Vin(_) Vout(_) Vsense(_) Figure D: Typical application circuit (negative logic unit, permanently enabled). Figure E: Internal Input Filter Diagram (component values listed on the specifications page). Electrolytic Capacitor 47µF |
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