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VIPER28LN 数据表(PDF) 4 Page - STMicroelectronics |
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VIPER28LN 数据表(HTML) 4 Page - STMicroelectronics |
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4 / 29 page  Block diagram VIPER28 4/29 1 Block diagram 2 Typical power Figure 2. Block diagram 2nd OCP THERMAL SHUTDOWN BURST OTP LEB OCP BLOCK OVP DETECTION LOGIC HV_ON S R Q Rsense UVLO + - Disable TURN-ON LOGIC + - PWM LEB OCP 2nd OCP LOGIC OSCILLATOR OLP Tov l BLOCK SUPPLY & UVLO S R Q HV_ON Istart-up PWM BLOCK BURST-MODE REFERENCES BURST-MODE LOGIC SOFT START OVP GND Vcc FB DRAIN CONT Ref erence Voltages OTP OVP OLP & Internal Supply bus BURST Tovl 2nd OCP THERMAL SHUTDOWN BURST OTP LEB OCP BLOCK OVP DETECTION LOGIC HV_ON S R Q Rsense UVLO + - Disable TURN-ON LOGIC + - PWM LEB OCP 2nd OCP LOGIC OSCILLATOR OLP Tov l BLOCK SUPPLY & UVLO S R Q HV_ON Istart-up PWM BLOCK BURST-MODE REFERENCES BURST-MODE LOGIC SOFT START OVP GND VDD FB DRAIN CONT Ref erence Voltages OTP OVP OLP & Internal Supply bus BURST Tovl EPT EPT Table 2. Typical power Part number 230 VAC 85-265 VAC Adapter(1) Open frame(2) Adapter(1) Open frame(2) VIPER28 18 W 24 W 10 W 13 W 1. Typical continuous power in non ventilated enclosed adapter measured at 50 °C ambient. 2. Maximum practical continuous power in an open frame design at 50 °C ambient, with adequate heat sinking. |
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