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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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PM8800ATR Arkusz danych(PDF) 5 Page - STMicroelectronics |
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PM8800ATR Arkusz danych(HTML) 5 Page - STMicroelectronics |
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5 / 35 page  PM8800A Typical application circuit and block diagram 5/35 1.2 Block diagram Figure 3. Block diagram of the PoE PD interface Figure 4. Block diagram of the current mode PWM controller 1.4V + - 1.4V - + + - 1.4V EN Gate Controller High Voltage Startup Regulator VCC nPGD GND RCLASS VIN AUXI_IRL DCCL VSS Current and Voltage Sense Interface Manager Power Good Ctrl Logic Thermal Protection 24.5k Zener Ref + - + - 2V - + 1.4V 1.25V - + - + 1.5V 30uA + - 2V UVLO threshold Classification threshold Detection threshold DC/DC controller VCC 1.5V - + UVLO VCC threshold 0.6V DC/DC Enable AUX Manager AUXII 3.3V 3.3V - + E/A R R - + PWM Oscillator Q Q SET CLR S R - + PWM logic GD RT FB Driver COMP CS AGND 1.25V 0.5V 3.3V VCC Slope Compensation Cycle by cycle over current protection 80% duty cycle limit (PM8800A) Leading Edge Blanking 45 A OC1 - + 0.7V OC2 2.5kOhm SS 10 A 10 A - + 3.3V SS LOGIC discharge charge charge discharge fast discharge Hiccup on OC2 or persistent OC1 DC/DC Enable 45µA 10µA 10µA |
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