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TEA2164 データシート(PDF) 8 Page - STMicroelectronics |
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TEA2164 データシート(HTML) 8 Page - STMicroelectronics |
8 / 15 page Figure 5 : Burst Mode Waveforms Tch ≈ 1s (typ) T1 ≈ 0.3s (typ) Tstart-up = Tch + T1 T1 : necessary time for voltage setting-up Figure 6 : Power Supply Start-up d) Abnormal conditions : safety functions Overvoltage Protection When VCC exceeds VCC max, an internal flip-flop stops output conduction signals. The circuit will start again after the capacitor C1 discharge ; it means : after loss of synchronization or after Vcc stop crossing (Figure 7). In flyback converters, this function protects the power supply against output voltage runaway. Under Voltage Lock-out The TEA2164 control circuit stops operating when VCC goes under VCC stop. Power Limitation, Current Protection, Long Duration Overload Protection - Output power limitation : by a pulse by pulse collector current limitation the TEA2164 limits the maximum output power. VCM1 is the correspond- ing voltage threshold, its detection is memorized up to the next period. - Current protection (transistor protection) Under particular conditions a hard overload or short circuit may induce a flux runaway in spite of the current limitation (VCM1). The TEA2164 control circuit features a second current protection, VCM2. When this threshold is reached an internal flip-flop memorizes it and TEA2164 8/15 |
同様の部品番号 - TEA2164 |
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同様の説明 - TEA2164 |
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