NCP1937A2G Combination PFC QuasiResonant Flyback Controller

SOP-17

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R$ 37,00

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ou R$ 38,42 em 1x no cartão (via site)

ou R$ 40,56 no cartão em até 10x sem juros (apenas na loja física)

R$ 37,00

à vista no Pix ou Boleto

R$ 38,42
em 1x no cartão (via site)

R$ 40,56 no cartão
em até 10x sem juros
(apenas na loja física)

Comprar

Condição:

Novo em embalagem comercial

Garantia:

3 meses direto com a Net Computadores

NCM:

85423190

R$ 37,00

à vista no pix

Comprar

Condição:
Novo em embalagem comercial

Garantia:
3 meses direto com a Net Computadores

NCM: 85423190

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NCP1937A2G Combination PFC QuasiResonant Flyback Controller
SOP-17

Condição de NCP1937A2G: Novo em embalagem comercial

Garantia de NCP1937A2G: 3 meses direto com a Net Computadores

This combination IC integrates power factor correction (PFC) and quasi-resonant flyback ality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application. The PFC stage exhibits near-unity power factor operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage minimizing the number of external components.

The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions consuming very low standby power consumption.

Common General Features
- Wide VCC Range from 9 V to 30 V with Built-in Overvoltage Protection
- High-Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry for Reduced Standby Power
- Integrated High-Voltage Brown-Out Detector
- Integrated High-Voltage Switch Disconnects PFC Feedback Resistor Divider to Reduce Standby Power
- Fault Input for Severe Fault Conditions, NTC Compatible (Latch and Auto-Recovery Options)
- 0.5 A / 0.8 A Source / Sink Gate Drivers
- Internal Temperature Shutdown
- Power Savings Mode Reduces Supply Current Consumption to 70 A Enabling Very Low Input Power

Applications:
- PFC Controller Features
- Critical Conduction Mode with Constant On Time Control (Voltage Mode) and Maximum Frequency Clamp
- Accurate Overvoltage Protection
- Bi-Level Line-Dependent Output Voltage
- Fast Line / Load Transient Compensation
- Boost Diode Short-Circuit Protection
- Feed-Forward for Improved Operation across Line and Load
- Adjustable PFC Disable Threshold Based on Output Power QR Flyback Controller Features
- Valley Switching Operation with Valley-Lockout for Noise-Free Operation
- Frequency Foldback with Minimum Frequency Clamp for Highest Performance in Standby Mode
- Minimum Frequency Clamp Eliminates Audible Noise
- Timer-Based Overload Protection (Latched or Auto-Recovery options)
- Adjustable Overpower Protection
- Winding and Output Diode Short-Circuit Protection
- 4 ms Soft-Start Timer

Maiores detalhes de NCP1937A2G no site do fabricante:
https://www.onsemi.com/pdf/datasheet/ncp1937-d.pdf

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