Document
DNP015 — mWSaver™ Fairchild Power Switch (FPS™)
April 2013
DNP015 Green Mode Fairchild Power Switch (FPS™)
Features
mWSaver™ Technology
Achieves Low No-Load Power Consumption:
< 40 mW at 230 VAC (EMI Filter Loss Included)
Meets 2013 ErP Standby Power Regulation
(< 0.5 W Consumption with 0.25 W Load) for ATX Power and LCD TV Power
Eliminates X-Cap Discharge Resistor Loss with
AX-CAP® Technology
Linearly Decreased Switching Frequency at
Light-Load Condition and Advanced Burst Mode Operation at No-Load Condition
700 V High-Voltage JFET Startup Circuit to
Eliminate Startup Resistor Loss
Highly Integrated with Rich Features
Internal Avalanche-Rugged 700 V SenseFET Built-in 5 ms Soft-Start Peak-Current-Mode Control Cycle-by-Cycle Current Limiting Leading-Edge Blanking (LEB) Synchronized Slope Compensation Proprietary Asynchronous Jitter to Reduce EMI
Advanced Protection
Internal Overload / Open-Loop Protection (OLP) VDD Under-Voltage Lockout (UVLO) VDD Over-Voltage Protection (OVP) Constant Power Limit (Full AC Input Range) Internal Latch Protection (OLP, VDD OVP, OTP) Internal OTP Sensor with Hysteresis
Description
The DNP015 is a next-generation, Green Mode Fairchild Power Switch (FPS™) that incorporates Fairchild’s innovative mWSaver™ technology, which dramatically reduces standby and no-load power consumption, enabling conformance to all worldwide Standby Mode efficiency guidelines. It integrates an advanced current-mode pulse width modulator (PWM) and an avalanche-rugged 700 V SenseFET in a single package, allowing auxiliary power designs with higher standby efficiency, reduced size, improved reliability, and lower system cost than prior solutions.
Fairchild Semiconductor’s mWSaver™ technology offers best-in-class minimum no-load and light-load power consumption. An innovative Ax-CAP® method, one of the five proprietary mWSaver™ technologies, minimizes losses in the EMI filter stage by eliminating the X-cap discharge resistors while meeting IEC61010-1 safety requirements. mWSaver™ Green Mode gradually decreases switching frequency as load decreases to minimize switching losses.
Proprietary asynchronous jitter decreases EMI emission and built-in synchronized slope compensation allows stable peak-current-mode control over a wide range of input voltage. The proprietary internal line compensation ensures constant output power limit over the entire universal line voltage range.
Requiring a minimum number of external components, DNP015 provides a basic platform that is well suited for the cost-effective flyback converter design with low standby power consumption.
Applications
General-purpose switched-mode power supplies (SMPS) and flyback power converters, including:
Auxiliary Power Supply for PC, Server, LCD TV,
and Game Console
SMPS for VCR, SVR, STB, DVD, and DVCD
Player, Printer, Facsimile, and Scanner
General Adapter LCD Monitor Power / Open-Frame SMPS
Ordering Information
Part Number SenseFET
DNP0.