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FEB4065 Datasheet(PDF) 5 Page - Siemens Semiconductor Group |
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FEB4065 Datasheet(HTML) 5 Page - Siemens Semiconductor Group |
5 / 29 page PEB/F 4065 Overview Semiconductor Group 5 1998-03-01 1.2 Functional Description Figure 1 Block Diagram The PEB 4065 supports AC and DC control loops based on feeding a voltage V ab to the line and sensing the transversal line current I ab (Figure 2). It converts a unipolar input voltage V 2W into a differential output voltage Vab with an AC receiving gain of Gr = V abAC/V2WAC = 40. This is accomplished by converting the input voltage to a current which is used to transpose the low voltage signals of the interface to the high voltage line feeding section. This current is reconverted to two voltages of opposite phase which are referenced to the positive and negative supply voltage, respectively. Thus the differential DC line-voltage in all normal polarity modes except ringing is related to the input voltage by V abDC = VBAT – VHINT + Vfix –40 × V2WDC V BAT negative battery voltage V HINT internal positive supply voltage V fix internal voltage drop of supply filter (appr. 2 V). Depending on the operation mode, V HINT is switched either to VH (VHINT = VH –1 V) or to BGND ( V HINT = – 0.5 V) via the supply switch. ITB10371 Buffer Buffer Current sensor Differential Supply Control V/I Converter Reference Switch I/V-Converter Supply C1 C2 V PDN 2W AGND BAT VV BIM SS V DD V RING TIP V ab BGND HINT V a Ι Ι b V BAT V H Ι TL Ι |
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Similar Description - FEB4065 |
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