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LC4105V Fiches technique(PDF) 5 Page - Sanyo Semicon Device |
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LC4105V Fiches technique(HTML) 5 Page - Sanyo Semicon Device |
5 / 6 page No. 5641-5/6 LC4105V Power Supply Circuits Keep the impedance of the VSS and VSS1 lines as low as possible. Connect a large electrolytic capacitor across the VDD1 and VSS1 pins and close to the IC. Wherever possible, keep the grounds for the power supply circuits and the signal circuits separate and connect the two at a single point. Notes on Power-Supply Voltage Application This IC has two power supply systems: VDD (VDD1) and VCC, and requires that applications observe the notes provided here when applying or removing these voltages. In particular, if the VDD (VDD1) system power-supply voltage becomes higher than the VCC system voltage while the VCC system voltage is not yet established (i.e. is less than VCCmin), excessive currents may flow and the IC may be destroyed. To prevent destruction of the IC due to this phenomenon, applications must, basically, follow the sequence described in item 1 below when turning the power supplies on or off. 1. When turning the power on, first apply the VCC voltage (bring this voltage to a value above VCCmin), and then apply the VDD voltage. When turning the power off, first drop the VDD voltage, and, after VDD is below VCCmin, then drop the VCC voltage. Power-supply voltage Time VDD,VDD1 VCC |
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