Welcome Here  Shenzhen Mingjiada Electronics Co., Ltd.

The NCP1611ADR2G employs an innovative current-controlled frequency foldback (CCFF) approach for driving the PFC boost stage. In this mode, the circuit typically operates in critical conduction mode (CrM) when inductor current exceeds a programmable threshold. As current falls below the preset value, the NCP1611ADR2G linearly attenuates the frequency, reducing to approximately 20kHz when current reaches zero. CCFF technology maximises efficiency under both rated load and light load conditions, notably minimising standby losses. Similar to FCCrM controllers, its internal circuitry maintains near unity power factor even at reduced switching frequencies. Housed in an SO-8 package, this chip integrates all key features required for a robust, compact PFC stage, necessitating minimal external components.

NCP1611ADR2G Features

• Near unity power factor

• Critical conduction mode (CrM)

• Current control frequency foldback (CCFF): Enforces low-frequency operation at low current levels

• On-time modulation ensures optimised current waveform in CCFF mode

• Frequency hopping near line zero-crossing

• Rapid line/load transient compensation (dynamic response enhancer)

• Valley turn-on

• High drive capability: −500 mA / +800 mA

• VCC voltage range: 9.5 V to 35 V

• Low start-up power consumption

• Version A: Low VCC start-up voltage (10.5 V), Version B: High VCC start-up voltage (17.0 V)

• Line voltage range detection

• Configurable for low harmonic content across wide input/load ranges

• Compliant with EN61000-3-2 Class C for dimmable ballasts across wide load ranges

• Lead-free packaged device

NCP1611ADR2G Specifications

Switching frequency:    20 kHz    

Minimum operating temperature:    -40°C    

Maximum operating temperature:    +125°C

Mounting Style:    SMD/SMT    

Package / Case:    SOIC-8    

Pd - Power Dissipation:    550 mW

NCP1611ADR2G Typical Applications

• Computer, television, and adapter power supplies

• LED drivers and ballasts (including dimmable models)

• All offline applications requiring power factor correction

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.