MIN1072MMinE-CAP Bulk Capacitor Miniaturization and Inrush Management IC for Very High Power Density AC/DC Converters Product Highlights • Up to 50% volume reduction of input bulk capacitors (E-CAPs) CLV • Eliminates inrush NTC • Significantly reduces i2t stress on the input bridge rectifier and fuse • Partners with the InnoSwitch™ IC family for lowest component count CHV ultra-compact AC/DC converters ~DVBOTVTOPLDVFWDSRBPSGNDISAdvanced Protection / Safety FeaturesMinE-CAPVOUT • Integrated temperature sensing and hysteretic thermal shutdown SBPSBPPInnoSwitch3-CP • Input surge protection PI-9208-100720 • Pin open/short-circuit and E-CAP UV/OV fault reporting Applications Figure 1. Typical Application Schematic. • High power density universal input AC-DC converters • Applications with very wide input range (90 – 350+ VAC) Description 180 170 The MinE-CAP™ IC dramatical y shrinks the size of input bulk capacitors 160 without compromising output ripple, operating efficiency or requiring -9209-110220 150 PI redesign of the transformer. When compared to traditional techniques 140 130 such as very high switching frequency operation, MinE-CAP achieves µ F) 120 Range the same or greater overall power supply size reduction whilst avoiding 110 Total Bulk Capacitance RangeLV the chal enges of complex EMI filtering and the increased transformer/ 100 160 V C clamp dissipation associated with very high frequency designs. 90 80 MinE-CAP also precisely manages inrush current at AC turn-on, 70 eliminating the need for dissipative NTCs or large slow-blow fuses. 60 Capacitance ( 50 Figure 1 il ustrates, the circuit configuration when using MinE-CAP. 40 30 The input E-CAPs are arranged with a small high-voltage capacitor (C HV 20 typical y 400 V) in paral el with a low-voltage capacitor (C typical y 400 V CHV Range LV 10 160 V) connected in series with the MinE-CAP IC. The physical size of 0 the input capacitors is minimized because a high percentage of the 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 input capacitance is 160 V rated rather than 400 V as would normal y Output Power (W) be used in conventional universal input converters. Figure 2. Typical Component Value Ranges for Optimal Space Saving and MinE-CAP can also be used in applications requiring extended Converter Operation. 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 smal er value than would normal y be required. During steady state-operation MinE-CAP introduces C into the circuit LV at low AC line voltage when maximum input capacitance is required. To achieve this, MinE-CAP monitors the input rail and voltage across C LV to dynamical y 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 selection chart of Figure 2 il ustrates the recommended range of Figure 3. MIN1072M MinSOP-16A Package. C and C values to achieve the required total input capacitance for a HV LV given output power. EMI filter configurations can be adopted depending on the form factor C is an electrolytic capacitor while C can be selected as an of a particular application. The MinE-CAP IC is designed to partner LV HV electrolytic or ceramic. Ceramic capacitors in the range of 1 to 5 mF directly with the InnoSwitch family of power supply ICs with a minimum 400 V (depending on power level) have very low esr and typical y offer of external components. The existing InnoSwitch V pin resistor is the most space saving when the power supply is designed to connected to the MinE-CAP VTOP pin while a resistor connected to the accommodate ceramic capacitor characteristics (see Applications VBOT pin enables C voltage monitoring. Input voltage and fault LV Considerations section). 400 V electrolytic capacitors are lower cost information is transmitted from the MinE-CAP LINE (L) pin to the and when selected according to Figure 2 also provide up to 50% size InnoSwitch V pin with no additional components. The MinE-CAP IC reduction compared to traditional designs. A variety of standard input also derives its bias supply directly from the InnoSwitch BPP pin. www.power.com November 2020 This Product is Covered by Patents and/or Pending Patent Applications.