UC3843BD1 ST PWM Controller | 8-SOIC | 8.2V-30V, 275kHz

Product Overview

The UC3843BD1 from STMicroelectronics is a high-performance fixed-frequency current-mode PWM controller designed for off-line and DC-to-DC converter applications. It features low startup current, trimmed oscillator discharge current, and a precision reference. The device operates at a switching frequency up to 275 kHz and includes an under-voltage lockout (UVLO) with hysteresis, ensuring reliable startup and shutdown. The 8-SOIC package offers a compact solution for space-constrained designs.

Detailed Technical Specifications

Key Features

• Current-mode control for improved transient response and simplified loop compensation
• Low startup current (0.5 mA typical)
• Trimmed oscillator discharge current for precise frequency control
• Under-voltage lockout with hysteresis
• High-current totem-pole output driver
• Internal precision reference (5V ±2%)
• Low cross-conduction current

Target Applications

• AC-DC adapters and chargers for consumer electronics
• DC-DC converters in telecom infrastructure (e.g., 5G base station power supplies)
• Industrial power supplies for automation systems
• Automotive power modules (e.g., dashboard display power)
• LED lighting drivers
• Battery chargers for portable devices

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for UC3843BD1. 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

UC3843BD1 是意法半導體推出的一款高性能固定頻率電流模式PWM控制器，適用於離線式和DC-DC轉換器應用。它具有低啟動電流、精確的振盪器放電電流和精密參考電壓。該器件的工作頻率高達275 kHz，並包含帶滯後的欠壓鎖定（UVLO）功能，確保可靠的啟動和關斷。8-SOIC封裝為空間受限的設計提供了緊湊的解決方案。

詳細技術參數

核心特性

• 電流模式控制，改善瞬態響應並簡化環路補償
• 低啟動電流（典型值 0.5 mA）
• 精確的振盪器放電電流，實現精準頻率控制
• 帶滯後的欠壓鎖定
• 高電流推挽輸出驅動器
• 內部精密參考電壓（5V ±2%）
• 低交叉導通電流

典型應用場景

• 消費電子產品的AC-DC適配器和充電器
• 電信基礎設施中的DC-DC轉換器（例如5G基站電源）
• 工業自動化系統的電源
• 汽車電源模塊（例如儀表板顯示電源）
• LED照明驅動器
• 便攜設備的電池充電器

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 UC3843BD1 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]