مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

The MinE-CAP™ IC dramatically shrinks the size of input bulk capacitors without compromising output ripple, operating efficiency or requiring redesign of the transformer. When compared to traditional techniques such as very high switching frequency operation, MinE-CAP achieves the same or greater overall power supply size reduction whilst avoiding the challenges of complex EMI filtering and the increased transformer/ clamp dissipation associated with very high frequency designs. MinE-CAP also precisely manages inrush current at AC turn-on, eliminating the need for dissipative NTCs or large slow-blow fuses. MinE-CAP can also be used in applications requiring extended wide-range input (90 VAC to 350+ VAC), again with a high percentage of the input capacitance 160 V rated along with either stacked 400 V or 500 - 600 V rated capacitors of much smaller value than would normally be required. During steady state-operation MinE-CAP introduces Cuv into the circuit at low AC line voltage when maximum input capacitance is required. To achieve this, MinE-CAP monitors the input rail and voltage across Cuv to dynamically engage and disengage this capacitor during every AC line cycle as required to ensure that the power supply operates smoothly across the entire specified input voltage range. The MinE-CAP IC is designed to partner directly with the InnoSwitch family of power supply ICs with a minimum of external components. The existing InnoSwitch V pin resistor is connected to the MinE-CAP VTOP pin while a resistor connected to the VBOT pin enables Cuv voltage monitoring. Input voltage and fault information is transmitted from the MinE-CAP LINE (L) pin to the InnoSwitch V pin with no additional components. The MinE-CAP IC also derives its bias supply directly from the InnoSwitch BPP pin.

Features

• Up to 50% volume reduction of input bulk capacitors (E-CAPs)
• Eliminates inrush NTC
• Significantly reduces i2t stress on the input bridge rectifier and fuse
• Partners with the InnoSwitch™ IC family for lowest component count ultra-compact AC/DC converters
• Integrated temperature sensing and hysteretic thermal shutdown
• Input surge protection
• Pin open/short-circuit and E-CAP UV/OV fault reporting

Applications

• High power density universal input AC - DC converters
• Applications with very wide input range (90 - 350+ VAC)