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MAX17703EVKITA Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX17703EVKITA Datasheet(HTML) 8 Page - Maxim Integrated Products |
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8 / 15 page  Maxim Integrated │ 8 www.maximintegrated.com Evaluates: MAX17703 in 4.2V Li-Ion Battery Charger Application MAX17703EVKITA# Evaluation Kit Hot Plug-In and Long Input Cables The MAX17703EVKITA# PCB layout provides an electro- lytic capacitor (C15 = 68μF/100V). This capacitor limits the peak voltage at the input of the MAX17703 when the DC input source is “hot-plugged” to the EV kit input terminal (DCIN) with long cables. The equivalent series resistance (ESR) of the electrolytic capacitor dampens the oscillations caused by interaction of the inductance of the long input cables, and the ceramic capacitors at the charger input (VIN). An electrolytic capacitor at DCIN pre- vents the DCIN voltage from being less than -0.3V during input short events by providing damping with ESR. Electromagnetic Interference (EMI) Compliance to conducted emissions (CE) standards requires an EMI filter at the input of a switching power converter-based charger. The EMI filter attenuates high- frequency currents drawn by the charger, and limits the noise injected back into the input power source. The MAX17703EVKITA# PCB has designated footprints for the placement of conducted EMI filter components as per the optional Bill of Material (BoM). Use of these filter components results in lower conducted EMI, below CISPR 32 Class B limits. Cut open the trace at L2 before installing conducted EMI filter components. The MAX17703EVKITA# PCB layout is also designed to limit radiated emissions from switching nodes of the charger, resulting in radiated emissions below CISPR 32 Class B limits. |
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