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PQ48150QGA07NYS Datasheet(PDF) 11 Page - SynQor Worldwide Headquarters |
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PQ48150QGA07NYS Datasheet(HTML) 11 Page - SynQor Worldwide Headquarters |
11 / 13 page Product # PQ48150QGA07 Phone 1-888-567-9596 Doc.# 005-2QG415D Rev. D 8/16/02 Page 11 Technical Specification 48Vin 15Vout 6.7A Quarter Quarter Brick Brick Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. 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 web site (www.synqor.com) which provides an understanding of why this instability arises, and shows the preferred solution for cor- recting it. Application Circuits: Figure D below provides a typical cir- cuit diagram which details the input filtering and voltage trim- ming. Input Filtering and External Capacitance: Figure E below provides a diagram showing the internal input filter com- ponents. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the “Input Characterisitcs” 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(_) Electrolytic Capacitor 33µF ESR ≅1Ω Figure D: Typical application circuit (negative logic unit, permanently enabled). Figure E: Internal Input Filter Diagram (component values listed on page 3). |
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