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L4964 Datasheet(PDF) 10 Page - STMicroelectronics |
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L4964 Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 13 page APPLICATION INFORMATION CHOOSING THE INDUCTOR AND CAPACITOR The input and output capacitors of the L4964 must have a low ESR and low inductance at high current ripple. Preferably, the inductor should be a toroidal type or wound on a Moly-Permalloy nucleus.Saturation must not occur at current levels below 1.5 times the current limiter level. MPP nuclei have very soft satu- ration characteristics. L = (Vi − Vo) V0 Vi f ∆IL , C = (Vi − Vo) V0 8L f 2 ∆Vo ∆IL = Inductance current ripple ∆Vo = Output ripple voltage Figure 13 : Typical Application Circuit. SUGGESTED INDUCTOR (L1) Core Type No Turns Wire Gauge (mmm) Air Gap (mm) Magnetics 58930 – A2MPP 43 1.0 – Thomson GUP 20 x 16 x 7 50 0.8 0.7 Siemens EC 35/17/10 (B6633& – G0500 – X127) 40 2 x 0.8 – VOGT 250 µH Toroidal Coil, Part Number 5730501800 Resistor Values for Standard Output Volt- ages V0 R8 R7 12 V 15 V 18 V 4.7 k Ω 4.7 k Ω 4.7 k Ω 6.2 k Ω 9.1 k Ω 12 k Ω L 4964 C7, C8 : EKR (ROE) Figure 14 : P.C. Board and Component Layout of the Circuit of Fig. 13 (1:1 scale) L4964 10/13 |
Similar Part No. - L4964_03 |
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Similar Description - L4964_03 |
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