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S24DE05003NTFH Datasheet(PDF) 7 Page - Delta Electronics, Inc. |
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S24DE05003NTFH Datasheet(HTML) 7 Page - Delta Electronics, Inc. |
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7 / 12 page  S24SE/S24DE series 15W Single/Dual Output DC/DC Converter DS_S24SE/S24DE 15W _10172013 E-mail:DCDC@delta.com.tw http://www.deltaww.com/dcdc P7 DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few μH, we advise a 47μF electrolytic capacitor mounted close to the input of the module to improve the stability. Input Reflected Ripple Current Vin+ Vin- is ic 100uF, ESR=0.2 ohm @ 25oC 100KHz Cs: 220uF + + Vin+ Vin- is ic 100uF, ESR=0.2 ohm @ 25oC 100KHz Cs: 220uF + + is ic 100uF, ESR=0.2 ohm @ 25oC 100KHz Cs: 220uF + + + + Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 μH. Capacitor Cs offset possible battery impedance. Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 100µF electrolytic capacitor (25 mA/div, 2us/div). Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (5 mA/div, 2us/div) Output Ripple Noise Output voltage ripple test setup. Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. |
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