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NCP1070 Datasheet(PDF) 3 Page - ON Semiconductor |
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NCP1070 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 30 page NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077 www.onsemi.com 3 PIN FUNCTION DESCRIPTION Pin N 5 Pin Name Function Pin Description 1 VCC Powers the internal circuitry This pin is connected to an external capacitor. The VCC includes an active shunt which serves as an auto−recovery over voltage protection. 2 NC 3 GND The IC Ground 4 FB Feedback signal input By connecting an opto−coupler to this pin, the peak current set point is adjusted accordingly to the output power demand. 5 Drain Drain connection The internal drain MOSFET connection 6 This un−connected pin ensures adequate creepage distance 7 GND The IC Ground 8 GND The IC Ground Vcc Vcc Management UVLO Reset Vdd t Drain Vcc GND S R Q Q UVLO OSC FB Jittering SKIP I FBskip line detection t recovery SCP OFF SKIP = ”1” −−> shut down some blocks to reduce consumption LEB + − Soft Start Reset + − Vclamp 80−us filter Vcc OVP DRV DRV 200 ns to CS setpoint Ipk(0) Ipflag Ipflag I FBfault I OVP TSD OFF UVLO LineOK LineOK Reset SS as recovering from SCP, TSD, Vcc OVP, or UVLO S R Q Q I FB freeze I Sawtooth Sawtooth Ramp compensation Foldback FB(up) R FB(REF) V SCP Figure 3. Simplified Internal Circuit Architecture |
Similar Part No. - NCP1070_16 |
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Similar Description - NCP1070_16 |
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