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TEA7063 データシート(PDF) 5 Page - STMicroelectronics |
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TEA7063 データシート(HTML) 5 Page - STMicroelectronics |
5 / 15 page CIRCUIT DESCRIPTION 1. DC CHARACTERISTICS 1.1 VC (pin 17) The stabilized voltage VC is connected to Vline (pin 16) through an internal shunt regulator T1, T2, which presents to the line a high AC imped- ance at frequecncies higher than 200Hz. At this purpose the value of C1 (at pin 17) must be not lower than 47 µF (suggested value is 100µF). The shunt regulator, T1 and T2, also controls the extra current source, or power management, at pin 12 (see also paragraph 6). 1.2 VLINE (pin 16) The line voltage (pin 16) is determined by the value of the external resistor R6 and by the inter- nal current, Iint, flowing between VC (pin 17) and Ground (see also paragr.: 1.1): VLINE =VC +R 6 x Iint VC is fixed by design at about 2.5V. Iint is reversely related to R9: Iint = 8 Volt/R9 + 60 µAat IL > 25mA Iint = 4 Volt/R9 + 60 µAat IL = 6mA where IL depends on ILB (see supply manage- ment) VLINE must be externally adjusted (with R6) to guarantee both DC and AC characteristic in ac- cordance to the specific standard of the different adminastrations. Another adjustment of the DC characteristic is possible with R9. Increasing the value of R9 causes a decrease of Iint and consequently a re- duction of the product Iint x R9. (see also Para- graph 7) Figure 2 Figure 1 TEA7063 5/15 |
同様の部品番号 - TEA7063 |
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同様の説明 - TEA7063 |
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