L4981AD ST Power Factor Correction IC | 20-SO | 10-20V Supply, 50-250kHz

Product Overview

The L4981AD is a high-performance Power Factor Correction (PFC) controller IC from STMicroelectronics, designed for AC-DC converters requiring low harmonic distortion and high power factor. It operates in Transition Mode (TM) with a proprietary multiplier and voltage feed-forward to achieve near-unity power factor. The device is housed in a compact 20-SO package, making it suitable for space-constrained applications.

Detailed Technical Specifications

Key Features

• Transition Mode (TM) operation for reduced switching losses
• Proprietary multiplier with voltage feed-forward for fast line regulation
• Low start-up current (90 µA typical) for energy-efficient standby
• Accurate overvoltage protection (OVP) and overcurrent protection (OCP)
• Programmable output voltage via external divider
• Soft-start function to limit inrush current
• Disable function for low-power standby mode
• Compliant with IEC 61000-3-2 harmonic standards

Target Applications

• AC-DC power supplies for 5G base stations (e.g., 48V rectifiers)
• LED lighting drivers (e.g., 100W street light drivers)
• Industrial power supplies (e.g., 300W SMPS for factory automation)
• Home appliance power supplies (e.g., air conditioner inverter boards)
• Telecom power systems (e.g., -48V DC-DC converters)
• Battery chargers (e.g., 2kW EV chargers)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for L4981AD. Our core advantages include:

• 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
• In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
• HK-SZ Synergy, Flexible Settlement: Direct global shipping from Shenzhen with support for HK bank transfers and multi-currency.
• Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
• BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.

Quality Assurance & Compliance

Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.

• 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
• RoHS Compliant: All electronic components comply with international environmental and safety standards.
• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

L4981AD是意法半導體（STMicroelectronics）推出的高性能功率因數校正（PFC）控制器IC，專為需要低諧波失真和高功率因數的AC-DC轉換器設計。它採用過渡模式（TM）工作，並具有專有乘法器和電壓前饋功能，可實現接近1的功率因數。該器件採用緊湊的20-SO封裝，適合空間受限的應用。

詳細技術參數

核心特性

• 過渡模式（TM）工作，降低開關損耗
• 專有乘法器配合電壓前饋，實現快速線路調節
• 低啟動電流（典型值90 µA），節能待機
• 精確的過壓保護（OVP）和過流保護（OCP）
• 通過外部分壓器可編程輸出電壓
• 軟啟動功能限制浪湧電流
• 禁用功能實現低功耗待機模式
• 符合IEC 61000-3-2諧波標準

典型應用場景

• 5G基站AC-DC電源（例如48V整流器）
• LED照明驅動器（例如100W路燈驅動器）
• 工業電源（例如300W工廠自動化開關電源）
• 家用電器電源（例如空調逆變器板）
• 電信電源系統（例如-48V DC-DC轉換器）
• 電池充電器（例如2kW電動汽車充電器）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 L4981AD 提供全面的供應鏈與批發解決方案。 我們的核心優勢包括：

• 全天候環球客戶支援：專業團隊為您提供即時報價及技術支援，無需漫長等待。
• 現貨庫存，即日發貨：確保現貨充足。下午 4 點前確認訂單，即可安排當天寄出。
• 深港聯動，結算靈活：深圳直發全球，物流高效可靠；支援香港銀行戶口轉賬及多幣種結算。
• Escrow 擔保交易：支援 Escrow.com 平台交易，保障買賣雙方權益，小批量訂單亦可安心在線下單。
• BOM 配單與樣板服務：提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。

品質保證與合規

Jasin Chip 承諾所有出貨產品均為原廠正貨，具備完善的品質保證及產品可追溯性。

• 100% 原廠正貨：承諾所有供應零件均為原裝現貨，品質嚴格把關，來源清晰可追溯。
• 符合 RoHS 認證：所有電子元器件均符合國際環保標準及相關安全認證。
• 原廠封裝保護：嚴格保留原廠原始包裝及封條，確保物流過程中的靜電防護 (ESD) 與物理安全。

以上產品均為原廠正貨，提供 BOM 配單及現貨庫存支援，歡迎查詢。

HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]