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NCP1612A1 Datasheet(PDF) 10 Page - ON Semiconductor |
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NCP1612A1 Datasheet(HTML) 10 Page - ON Semiconductor |
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10 / 33 page  NCP1612A, NCP1612B, NCP1612A1, NCP1612A2, NCP1612A3, NCP1612B2 www.onsemi.com 10 Figure 3. Block Diagram DRV VDD Regul Vcc Output Buffer Internal Thermal Shutdown TSD OFF UVLO FB Vcontrol FFcontrol Vton processing circuitry GND STDWN OFF Iref Error Amplifier Vref 0.955*Vref hyst<0.5%Vref Dynamic Response Enhancer +/−20mA Vcc 4V R Q S BO fastOVP V OFF OVLflag1 All the RS latches are RESET dominant Vcc_OK REGUL pfcOK 200 mA VDD Vref OVLflag1 LpfcOK Fault management CS staticOVP (0.5−V bottom clamp is activated) UVP Vcc(on) / Vcc(off) BO_NOK Brown−out and Line Range Detection LLine OFF staticOVP OCP STOP R Q S L pwm1 Vpwm STOP IBO I BO IREGUL SKIP Current Information Generator and dead−time control Internal timing ramp DRV LLine CLK + − UVP softOVP 12%*Vref hyst<1%Vref 105%*Vref / 103% *Vref ZCD DT DRV 50mA staticOVP BO_NOK BUV_fault pfcOK + − STDWN 2.5 V BUV + − OFF pfcOK R Q S Lstdwn Vcc(reset) R Q S staticOVP BUV L BO OCP + − + − 750mV / 250mV ZCD Detection of excessive currents DRV 200−ns blanking time DRV 500mV Overstress 2R R FOVP 107% Vref hyst<1% Vref fastOVP BUVcomp BUVcomp 12*Vref UVP2 UVP2 0.5V 0.5V LLine 100−ns blanking time DRV R Q S staticOVP BONOK L BUV BUV_fault BO_fault softOVP SKIP CLK DT Overstress 0.5−V bottom clamp Overstress BONOK Vcc_OK pfcOK_in CCFF mode (including SKIP function) are inhibited whenever pfcOK_in is low VBUV NCP1612A2 and NCP1612B2 BUVcomp1 VBUV BUVcomp2 BUVcomp1 BUVcomp2 fastOVP NCP1612A2 and NCP1612B2 NCP1612A NCP1612A1 NCP1612A3 and NCP1612B NCP1612A NCP1612A1 NCP1612A3 and NCP1612B |
Similar Part No. - NCP1612A1 |
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Similar Description - NCP1612A1 |
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