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NCP1653DR2G Datasheet(PDF) 3 Page - ON Semiconductor |
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NCP1653DR2G Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 19 page NCP1653, NCP1653A http://onsemi.com 3 PIN FUNCTION DESCRIPTION Pin Symbol Name Function 1 FB / SD Feedback / Shutdown This pin receives a feedback current IFB which is proportional to the PFC circuit output voltage. The current is for output regulation, output overvoltage protection (OVP), and output undervoltage protection (UVP). When IFB goes above 107% Iref, OVP is activated and the Drive Output is disabled. When IFB goes below 8% Iref, the device enters a low−consumption shutdown mode. 2 Vcontrol Control Voltage / Soft−Start The voltage of this pin Vcontrol directly controls the input impedance and hence the power factor of the circuit. This pin is connected to an external capacitor Ccontrol to limit the Vcontrol bandwidth typically below 20 Hz to achieve near unity power factor. The device provides no output when Vcontrol = 0 V. Hence, Ccontrol also works as a soft−start capacitor. 3 In Input Voltage Sense This pin sinks an input−voltage current Ivac which is proportional to the RMS input voltage Vac. The current Ivac is for overpower limitation (OPL) and PFC duty cycle modulation. When the product (IS⋅Ivac) goes above 3 nA2, OPL is activated and the Drive Output duty ratio is reduced by pulling down Vcontrol indirectly to reduce the input power. 4 CS Input Current Sense This pin sources a current IS which is proportional to the inductor current IL. The sense current IS is for overcurrent protection (OCP), overpower limitation (OPL) and PFC duty cycle modulation. When IS goes above 200 mA, OCP is activated and the Drive Output is disabled. 5 VM Multiplier Voltage This pin provides a voltage VM for the PFC duty cycle modulation. The input impedance of the PFC circuit is proportional to the resistor RM externally connected to this pin. The device operates in average current−mode if an external capacitor CM is connected to the pin. Otherwise, it operates in peak current−mode. 6 GND The IC Ground − 7 Drv Drive Output This pin provides an output to an external MOSFET. 8 VCC Supply Voltage This pin is the positive supply of the device. The operating range is between 8.75 V and 18 V with UVLO start threshold 13.25 V. MAXIMUM RATINGS Rating Symbol Value Unit FB, Vcontrol, In, CS, VM Pins (Pins 1−5) Maximum Voltage Range Maximum Current Vmax Imax −0.3 to +9 100 V mA Drive Output (Pin 7) Maximum Voltage Range Maximum Current Range (Note 1) Vmax Imax −0.3 to +18 1.5 V A Power Supply Voltage (Pin 8) Maximum Voltage Range Maximum Current Vmax Imax −0.3 to +18 100 V mA Transient Power Supply Voltage, Duration < 10 ms, IVCC < 20 mA 25 V Power Dissipation and Thermal Characteristics P suffix, Plastic Package, Case 626 Maximum Power Dissipation @ TA = 70°C Thermal Resistance Junction−to−Air D suffix, Plastic Package, Case 751 Maximum Power Dissipation @ TA = 70°C Thermal Resistance Junction−to−Air PD RqJA PD RqJA 800 100 450 178 mW °C/W mW °C/W Operating Junction Temperature Range TJ −40 to +125 °C Storage Temperature Range Tstg −65 to +150 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. A. This device series contains ESD protection and exceeds the following tests: Pins 1−8: Human Body Model 2000 V per MIL−STD−883, Method 3015. Machine Model Method 190 V. B. This device contains Latchup protection and exceeds ±100 mA per JEDEC Standard JESD78. 1. Guaranteed by design. |
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