UC3845D TI PWM Controller | | 8.4V-30V Supply, 1A Peak Gate Drive

Product Overview

The UC3845D from Texas Instruments is a high-performance current-mode PWM controller designed for off-line and DC-to-DC converter applications. It features a wide supply voltage range from 8.4V to 30V, a 1A peak gate drive capability, and operates at a fixed frequency of up to 500kHz. The device includes an internal oscillator, error amplifier, precision reference, and protection features such as undervoltage lockout and cycle-by-cycle current limiting.

Detailed Technical Specifications

Key Features

• Current-mode control for improved transient response and simplified loop compensation
• Internal trimmed bandgap reference with 5V output
• High-current totem-pole output for driving MOSFETs
• Undervoltage lockout with hysteresis
• Cycle-by-cycle current limiting
• Low startup current (0.5mA typical)
• Frequency accuracy ±2%

Target Applications

• Off-line AC-DC power supplies for 5G base stations
• DC-DC converters for automotive dashboard systems
• Battery chargers for industrial equipment
• Power adapters for consumer electronics
• Telecom power modules

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for UC3845D. 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

UC3845D 是德州儀器（TI）推出的一款高性能電流模式 PWM 控制器，專為離線式和 DC-DC 轉換器應用設計。它具有 8.4V 至 30V 的寬電源電壓範圍、1A 峰值柵極驅動能力，並支援高達 500kHz 的固定頻率工作。該器件包含內部振盪器、誤差放大器、精密參考電壓以及欠壓鎖定和逐週期電流限制等保護功能。

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迴路補償
• 內部微調帶隙參考，輸出 5V
• 高電流推挽輸出，用於驅動 MOSFET
• 帶滯回的欠壓鎖定
• 逐週期電流限制
• 低啟動電流 (典型值 0.5mA)
• 頻率精度 ±2%

典型應用場景

• 5G 基站用離線式 AC-DC 電源
• 汽車儀表板系統的 DC-DC 轉換器
• 工業設備的電池充電器
• 消費電子產品的電源適配器
• 電信電源模塊

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 UC3845D 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]