MLCC_贴片电容.ppt

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MLCC_贴片电容

3.Walsin MLCC Introduction WTC Part No. 0805 B 104 K 500 N T (1) (2) (3) (4) (5) (6) (7) (1) Size Code (2) Dielectric (3) Capacitance (4) Tolerance (5) Voltage (6) Termination (7) Packaging Walsin MLCC Introduction (1) Size Code L * W ( in inches ): 0805 = 0.08 inch * 0.05 inch = ( 0.08 * 25.4 mm ) * ( 0.05 * 25.4 mm ) = 2.0 mm * 1.2 mm = 2012 inches mm 0201 0603 0402 1005 0603 1608 0805 2012 1206 3216 1210 3225 1808 4520 1812 4532 Walsin MLCC Introduction (2) Dielectric Walsin MLCC Introduction (3) Capacitance-1 Two significant digits followed by no. of zeros: 473 = 47 *103 pF = 47nF = 0.047uF For values below 10 pf, use “R” in place of decimal point : 4R7 = 4.7 pF C = Q / V = Coulomb/Voltage = FARAD Q(electric charge) = C(capacitance value)*V(applied voltage) I = dQ/dt = C*dV/dt (The value of Capacitance is defined as one FARAD when the Voltage across the capacitor is one Volt.,and a charging current of one Ampere flows for one second.) pico-farad (pf) = 10-12 farad nano-farad (nf) = 10-9 farad micro-farad(uf) = 10-6 farad Walsin MLCC Introduction (3) Capacitance-2 Walsin MLCC Introduction (4) Tolerance Walsin MLCC Introduction (5) Voltage Two significant digits followed by no. of zeros. 500 = 50 * 100 V Low voltage : 6.3V,10V,16 V, 25 V, 50 V High voltage: 100V,200/250V,500V,1KV,2KV,3KV Walsin MLCC Introduction (6) Termination N : Ag/Ni/SnPb (Noble metal) B : Cu/Ni/SnPb (Base metal) L : Ag/Ni/Sn (Noble metal) C : Cu/Ni/Sn (Base metal) Walsin MLCC Introduction (7) Packaging NO CODE : Bulk T : Ta

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