L4985A ST Power Factor Correction Controller | 8-SO | 10-22V Supply, 0.5A Gate Drive

Product Overview

The L4985A is a high-performance Power Factor Correction (PFC) controller from STMicroelectronics, designed for medium-power AC-DC converters. It operates in transition mode (TM) with a proprietary constant on-time control to achieve near-unity power factor and low THD. Housed in an 8-pin SO package, it integrates a 0.5A gate driver, making it suitable for boost PFC stages up to 300W. The device features a wide supply voltage range (10V to 22V) and includes protections such as overvoltage, overcurrent, and brownout.

Detailed Technical Specifications

Key Features

• Transition mode PFC controller with constant on-time control
• Low start-up current (30 µA) for efficient standby
• Integrated 0.5 A gate driver for external MOSFET
• Overvoltage, overcurrent, and brownout protection
• Soft-start for reduced inrush current
• Low THD (<10%) and high PF (>0.99)
• 8-SO package for compact designs

Target Applications

• AC-DC adapters for laptops and gaming consoles (e.g., Dell 180W adapter)
• LED lighting drivers (e.g., Philips 100W street light driver)
• Industrial power supplies for 5G base stations (e.g., Huawei 5G RRU power module)
• Home appliance power supplies (e.g., Samsung refrigerator inverter board)
• Battery chargers for electric tools (e.g., Makita 18V charger)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for L4985A. 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

L4985A是意法半導體（ST）推出的高性能功率因數校正（PFC）控制器，專為中等功率AC-DC轉換器設計。它採用過渡模式（TM）和專有的恆定導通時間控制，實現接近1的功率因數和低THD。器件採用8引腳SO封裝，集成0.5A柵極驅動器，適用於高達300W的升壓PFC級。其寬電源電壓範圍（10V至22V）和過壓、過流、欠壓保護功能確保了可靠性。

詳細技術參數

核心特性

• 過渡模式PFC控制器，恆定導通時間控制
• 低啟動電流 (30 µA)，實現高效待機
• 集成0.5A柵極驅動器，用於外部MOSFET
• 過壓、過流和欠壓保護
• 軟啟動，降低浪湧電流
• 低THD (<10%) 和高PF (>0.99)
• 8-SO封裝，適合緊湊設計

典型應用場景

• 筆記本電腦和遊戲機的AC-DC適配器（例如戴爾180W適配器）
• LED照明驅動器（例如飛利浦100W路燈驅動器）
• 5G基站的工業電源（例如華為5G RRU電源模塊）
• 家用電器電源（例如三星冰箱逆變器板）
• 電動工具電池充電器（例如牧田18V充電器）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 L4985A 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]