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Motore di ricerca datesheet componenti elettronici |
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ST619 Scheda tecnica(PDF) 6 Page - STMicroelectronics |
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ST619 Scheda tecnica(HTML) 6 Page - STMicroelectronics |
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6 / 9 page  ST619LB SERIES 6/9 APPLICATION INFORMATION Charge pump capacitors C1 and C2 The values of charge pump capacitors C1 and C2 are critical to ensure adequate output current and avoid excessive peak currents. It is suggested to use values in the range of 0.22 µF to 1.0µF and avoid the use of higher values of CO capacitors, in order to obtain best performance. Ceramic or tantalum capacitors are recommended. Input and output capacitors C3 and C4 The type of input capacitor (C3) and output filter capacitor (C4) used is not critical, but it does affect performance. Tantalums, ceramics or aluminium electrolytic are suggested. For lowest ripple, use large, low effective series resistance (ESR) ceramic tantalum capacitors. If the input supply source impedance is very low, C3 can be omitted. The typical application circuit shows the component values for proper operation using minimal board space. The input bypass capacitor (C3) and output filter capacitor (C4) should be at least 10 µF. Many capacitors exhibit 40% to 50% variation over temperature. Compensate for capacitor temperature coefficient by selecting a large nominal value to ensure proper operation over temperature. Layout Consideration In the below figure, the typical application demoboard of ST619LB is reported. A good layout ensures stability and helps maintain the output voltage under heavy loads. For best performance, use very short connections to the capacitors. TYPICAL APPLICATION CIRCUIT TYPICAL APPLICATION DEMOBOARD |
Codice articolo simile - ST619 |
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Descrizione simile - ST619 |
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