NCP1681BAD2R2G

$2.25

Description：TOTEM POLE CONTINUOUS CONDUCTION
Series：-
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:82e9033cf96e Category: PFC (Power Factor Correction) Brand: onsemi

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Product introduction

Product Detailed Parameters

Description：TOTEM POLE CONTINUOUS CONDUCTION
Series：-
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)
Mode：Continuous Conduction (CCM)
Frequency - Switching：65kHz
Voltage - Supply：30V
Operating Temperature：-
Mounting Type：Surface Mount
Package / Case：20-LSOP (0.154", 3.90mm Width), 18 Leads
Supplier Device Package：20-SOIC
Current - Startup：-
Grade：-
Qualification：-

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NCP1681BAD2R2G

Overview

The NCP1681BAD2R2G is a power factor correction controller IC designed for bridgeless totem pole PFC topologies. It supports multi-mode operation, switching between continuous conduction mode (CCM) and critical conduction mode (CrM). The device operates at a typical frequency of 65 kHz with a maximum supply voltage of 30V. Packaged in a 20-SOIC format, it integrates digital loop compensation and AC line monitoring.

Feature Summary

Supports multi-mode operation transitioning between CCM and CrM for optimized efficiency across varying loads
Integrates novel current sensing schemes and digital voltage loop compensation
Includes AC line monitoring circuits and phase detection capabilities

Applications

High-density offline power supplies
Server and high-performance computing power systems
Telecommunications equipment power stages
Industrial power conversion units

Procurement Notes

Verify the specific suffix BAD2R2G against official datasheets to confirm multi-mode functionality versus fixed-frequency variants. Ensure compatibility with bridgeless totem pole topology requirements. Confirm package dimensions match SOIC-20 specifications before integration into PCB layouts.

Selection Notes

Select this variant for applications requiring adaptive mode switching to enhance light-load efficiency. Suitable for designs targeting 300W to 1kW output ranges. Verify that the system can accommodate the required gate drive characteristics for the totem pole configuration.

Part Context

Part of the NCP1681 family of PFC controllers from onsemi. Designed to replace MCU-based solutions for totem pole PFC implementations. Offers a cost-effective alternative for high-efficiency power factor correction without complex coding requirements.

Replacement Considerations

NCP1681AAD2R2G offers fixed-frequency CCM operation instead of multi-mode. NCP1681ABD2R2G provides similar functionality within the same product family.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.