L4981BD ST Power Factor Correction Controller | 20-SO | 10V-19.6V Supply, 400mA Gate Drive

Product Overview

The L4981BD is a high-performance Power Factor Correction (PFC) controller from STMicroelectronics, designed for AC-DC converters requiring high power factor and low harmonic distortion. It operates in transition mode (TM) with a proprietary multiplier circuit to achieve near-unity power factor. The device integrates a 400mA gate driver, overvoltage protection, and a wide supply voltage range of 10V to 19.6V. Housed in a compact 20-SO package, it is ideal for medium-power applications such as LED lighting, battery chargers, and industrial power supplies.

Detailed Technical Specifications

Key Features

• Transition mode PFC controller with high accuracy multiplier
• Low start-up current (50µA) and low quiescent current
• Programmable overvoltage protection (OVP)
• Boost inductor saturation detection
• Disable function for standby operation
• Internal 400mA gate driver for external MOSFET
• Under-voltage lockout (UVLO) with hysteresis

Target Applications

• AC-DC adapters for 5G base station power supplies
• LED street lighting drivers (e.g., 150W outdoor luminaires)
• Battery chargers for electric vehicles (e.g., 3kW onboard chargers)
• Industrial power supplies for factory automation
• Server and telecom power units

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STMicroelectronics推出的一款高性能功率因數校正（PFC）控制器，專為需要高功率因數和低諧波失真的AC-DC轉換器設計。它採用過渡模式（TM）工作，內置專有乘法器電路，可實現接近1的功率因數。該器件集成了400mA柵極驅動器、過壓保護功能，以及10V至19.6V的寬電源電壓範圍。採用緊湊的20-SO封裝，非常適用於LED照明、電池充電器和工業電源等中等功率應用。

詳細技術參數

核心特性

• 過渡模式PFC控制器，帶高精度乘法器
• 低啟動電流（50µA）和低靜態電流
• 可編程過壓保護（OVP）
• 升壓電感飽和檢測
• 禁用功能，用於待機操作
• 內部400mA柵極驅動器，用於外部MOSFET
• 欠壓鎖定（UVLO）帶滯回

典型應用場景

• 5G基站電源的AC-DC適配器
• LED路燈驅動器（例如150W戶外燈具）
• 電動汽車電池充電器（例如3kW車載充電器）
• 工廠自動化的工業電源
• 服務器和電信電源單元

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]