L4981BD ST Power Factor Correction IC | 20-SOIC | 10V-19.6V, 400mA

Product Overview

The L4981BD is a high-performance Power Factor Correction (PFC) controller IC from STMicroelectronics, designed for active power factor correction in AC-DC converters. It operates in transition mode (TM) and features a high-voltage startup circuit, low quiescent current, and comprehensive protection functions. The device is housed in a 20-SOIC (0.295", 7.50mm width) package, suitable for compact power supply designs.

Detailed Technical Specifications

Key Features

• Transition mode (TM) PFC controller
• High-voltage startup (up to 600V)
• Low startup current (30 µA typical)
• Programmable output voltage
• Accurate overvoltage protection
• Overcurrent protection with pulse-by-pulse limiting
• Brownout protection
• Low THD and high PF
• External synchronization capability
• RoHS compliant

Target Applications

• AC-DC power supplies for 5G base stations (e.g., 48V rectifier modules)
• LED lighting drivers (e.g., 100W street light driver)
• Industrial power supplies (e.g., 500W SMPS for factory automation)
• Consumer electronics adapters (e.g., 65W laptop charger)
• Automotive on-board chargers (e.g., 3.3kW OBC)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for L4981BD. 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

L4981BD是意法半導體（STMicroelectronics）推出的一款高性能功率因數校正（PFC）控制器IC，專為AC-DC轉換器中的主動功率因數校正設計。它工作於過渡模式（TM），具有高壓啟動電路、低靜態電流和全面的保護功能。器件採用20-SOIC（0.295"，7.50mm寬）封裝，適合緊湊型電源設計。

詳細技術參數

核心特性

• 過渡模式（TM）PFC控制器
• 高壓啟動（最高600V）
• 低啟動電流（典型值30 µA）
• 可編程輸出電壓
• 精確的過壓保護
• 逐脈衝限流的過流保護
• 欠壓保護
• 低THD和高PF
• 外部同步能力
• 符合RoHS標準

典型應用場景

• 5G基站AC-DC電源（例如48V整流模塊）
• LED照明驅動器（例如100W路燈驅動器）
• 工業電源（例如500W工廠自動化開關電源）
• 消費電子適配器（例如65W筆記本充電器）
• 車載充電器（例如3.3kW OBC）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 L4981BD 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]