NCP1602 Series

Power Factor Controller, Enhanced Light Load Efficiency

Catalog

Power Factor Controller, Enhanced Light Load Efficiency

Part	Current - Startup	Mode	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case
ON Semiconductor NCP1602ABASNT1G	480 µA	Critical Conduction (CRM)	6-TSOP	30 VDC	9.5 V	Surface Mount	125 °C	-40 °C	SOT-23-6 Thin TSOT-23-6
ON Semiconductor NCP1602AFCSNT1G	480 µA	Critical Conduction (CRM)	6-TSOP	30 VDC	9.5 V	Surface Mount	125 °C	-40 °C	SOT-23-6 Thin TSOT-23-6
ON Semiconductor NCP1602DCCSNT1G	480 µA	Critical Conduction (CRM)	6-TSOP	30 VDC	9.5 V	Surface Mount	125 °C	-40 °C	SOT-23-6 Thin TSOT-23-6
ON Semiconductor NCP1602BEASNT1G	480 µA	Critical Conduction (CRM)	6-TSOP	30 VDC	9.5 V	Surface Mount	125 °C	-40 °C	SOT-23-6 Thin TSOT-23-6

Catalog

Power Factor Controller, Enhanced Light Load Efficiency

Key Features

• Critical Conduction mode with current controlled frequency foldback

• Valley Synchronized Frequency Fold-back (VSFF)

• Works with or without a transformer w/ ZCD winding

• Dynamic Response Enhancer

Description

The 6-pin PFC controller NCP1602 is designed to drive PFC boost stages. It is based on an innovative Valley Synchronized Frequency Fold-back (VSFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when control voltage exceeds a programmable value Vctrl,FF. When Vcontrol is below this preset level Vctrl,FF, the NCP1602 (versions [B**] and [D**]) linearly decays the frequency down to about 30 kHz until Vcontrol reaches the SKIP mode threshold. VSFF maximizes the efficiency at both nominal and light load. In particular, the stand-by losses are reduced to a minimum. Like in FCCrM controllers, internal circuitry allows near-unity power factor even when the switching frequency is reduced. Housed in a TSOP6 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components.