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STEVAL-ISA113V1 bảng dữ liệu(PDF) 3 Page - STMicroelectronics |
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3 / 11 page STEVAL-ISA113V1 Adapter features Doc ID 024140 Rev 1 3/11 The transformer core is a standard E13. The output voltage value is set in a simple way through the RfbH-RfbL voltage divider between the output terminal and the FB pin, according to the following formula: Equation 1 In the schematic, RfbH has been split into RfbH1 and RfbH2; and RfbL into RfbL1 and RfbL2 in order to allow a better tuning of the output voltage value. If the jumper J1 is not selected, the IC is biased through the internal HV-startup current generator (“self-biasing”). If low standby consumption and good efficiency performance are required, the HV-startup current generator must be excluded. This can be done selecting the jumper J1, which connects the output terminal to the VDD pin through a small signal diode. The IC biasing through the output is referred to as “external biasing”. IC1 VIPer06HS Offline high-voltage PWM controller SSO-10 ST T1 1921.0040 Transformer Magnetica Lin B82144A2105J 1 mH inductor LBC series Epcos Table 2. Bill of material (continued) Ref. Part Description Package Manufacturer ⎟⎟⎠ ⎞ ⎜⎜⎝ ⎛ + ⋅ = RfbL RfbH V VOUT 1 3 . 3 |
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