一般說明：MAX5974DETE+T
MAX5974DETE+T_ 為寬輸入電壓提供控制，有源鉗位、電流模式 PWM、正向轉換器在以太網供電 (PoE) 受電設備 (PD) 應用中。 MAX5974A/MAX5974C非常適合通用或電信輸入范圍，而 MAX5974B/MAX5974DETE+T還適應低輸入電壓下降到 10.5V。這些設備包括多種功能以增強供應效率。 AUX 驅動器回收磁化電流，而不是將其浪費在耗散鉗位電路中。輔助和主之間的可編程死區時間驅動器允許零電壓開關 (ZVS)。在下面在輕載條件下，器件會降低開關頻率（頻率折返）以減少開關損耗。
MAX5974A/MAX5974B 具有獨特的電路在不使用光耦合器的情況下實現輸出調節，而 MAX5974C/MAX5974DETE+T利用傳統的光耦反饋法。內部誤差放大器1% 的參考在非隔離設計中非常有用，無需外部并聯穩壓器。這些設備具有獨特的前饋最大值占空比鉗位，使瞬態條件下的最大鉗位電壓與線路無關電壓，允許使用功率 MOSFET擊穿電壓。可編程頻率抖動功能提供低 EMI、擴頻操作。
MAX5974DETE+T_采用16引腳TQFN-EP封裝，額定工作溫度為-40°C至+85°C-40°C 至 +125°C 溫度范圍。

特征：MAX5974DETE+T
● 峰值電流模式控制，有源鉗位正向
脈寬調制控制器
● 無光耦調節（MAX5974A/
MAX5974B)
● 內部 1% 誤差放大器
● 100kHz 至 600kHz 可編程 ±8% 開關
頻率，同步高達 1.2MHz
● 用于低 EMI 的可編程頻率抖動，
擴頻操作
● 可編程死區、PWM 軟啟動、電流
斜率補償
● 可編程前饋最大占空比
鉗位，80% 最大限制
● 高效輕載頻率折返
手術
● 具有大遲滯的內部自舉 UVLO
● 100μA（典型值）啟動電源電流
● 快速逐周期峰值電流限制，典型值為 35ns
傳播延遲
● 115ns 電流檢測內部前沿消隱
● 具有打嗝模式的輸出短路保護
● 限制反向電流以防止變壓器
反向電流引起的飽和
● 電源輸入上的內部 18V 齊納鉗位
● 3mm x 3mm、無鉛、16 引腳 TQFN-EP

應用：MAX5974DETE+T
● PoE IEEE® 802.3af/at 受電設備
● 高功率 PD（超越 802.3af/at 標準）
● 有源鉗位正向 DC-DC 轉換器
● IP 電話
● 無線接入節點
● 安全攝像頭

產品屬性：MAX5974DETE+T
類型描述選擇
類別 集成電路（IC）PMIC - 穩壓器 - DC DC 開關式控制器
制造商 Maxim Integrated
系列 -
包裝 卷帶（TR）
零件狀態 在售
輸出類型 晶體管驅動器
功能 升壓/降壓
輸出配置 正，可提供隔離
拓撲 反激，正激轉換器
輸出數 1
輸出階段 1
電壓 - 供電 (Vcc/Vdd) 8.4V ~ 26V
頻率 - 開關 100kHz ~ 600kHz
占空比（最大） 80%
同步整流器 是
時鐘同步 是
串行接口 -
控制特性 空載時間控制，使能，頻率控制，軟啟動
工作溫度 -40°C ~ 85°C（TA）
安裝類型 表面貼裝型
封裝/外殼 16-WFQFN 裸露焊盤
供應商器件封裝 16-TQFN（3x3）
基本產品編號MAX5974DETE+T

以下物料均有現貨庫存：MAX5974DETE+T
STM32F101RBT6
STM32F103CBT6
STM32F103C8T6
STM32F103R8T6
STM32F103VBT6
STM32F103RBT6
STM32F103VCT6
STM32F103ZET6
STM32F103VET6
STM32F103RET6
STM32F103RCT6
STM32F103RGT6
STM32F103RCY6TR
STM32F103T8U6
STM32F103VGT6
STM32F103ZGT6
STM32F105RBT6
STM32F105RCT6
STM32F105R8T6
STM32F105VCT6
STM32F107VCT6
STM32F107RCT6
STM32F100R8T6B
STM32F100C6T6B
STM32F100VCT6B
STM32F100RBT6B
STM32F100C8T6B
STM32F100C4T6B
STM32F215RGT6
STM32F205RGT6
STM32F205RET6
STM32F205RCT6
STM32F205VGT6
STM32F205VET6

MAX5974DETE+T
STM32F205VCT6
STM32F205ZET6
STM32F205ZGT6
STM32F207VCT6
STM32F207VGT6
STM32F207VET6
STM32F207ZET6
STM32F207ZGT6
STM32F373CCT6
STM32F301K8T6
STM32F302C8T6
STM32F302CBT6
STM32F302RCT6
STM32F302RBT6
STM32F302K8U6
STM32F302VET6
STM32F302VDT6
STM32F302VCT6
STM32F303CBT6
STM32F303CCT6
STM32F303RBT6
STM32F303RCT6
STM32F303RET6
STM32F303VCT6
STM32F303VET6
STM32F303ZET6
STM32F411CEU6
STM32F411CCU6TR
STM32F411RCT6
STM32F411RET6
STM32F411VET6
STM32F412RET6
STM32F413VGT6
STM32F415RGT6
STM32F415VGT6
STM32F410CBU6
STM32F410RBT6
STM32F427IGT6
STM32F427VIT6
STM32F427VGT6
STM32F427ZGT6
STM32F427ZIT6
STM32F429BIT6
STM32F429IIT6
STM32F429IGT6
STM32F429VGT6
STM32F429VIT6
STM32F429VET6
STM32F429ZGT6
STM32F429ZIT6
STM32F429ZET6
STM32F446RET6
STM32F446RCT6
STM32F446VET6
STM32F446VCT6
STM32F446ZET6
STM32F446ZEJ6
STM32F469NIH6
STM32F401CEU6
STM32F401CBU6
STM32F401RCT6
STM32F401RBT6
STM32F401RET6
STM32F405RGT6
STM32F405VGT6
STM32F405ZGT6
STM32F407IGT6
STM32F407IGH6
STM32F407IET6
STM32F407VGT6
STM32F407VET6
STM32F407ZET6
STM32F407ZGT6
STM32F407ZGT7
STM32F400CBT6
STM32F722RET6
STM32F730R8T6
STM32F730V8T6
STM32F746VGT6
STM32F756VGT6
STM32F765VIT6
STM32F767ZGT6
STM32F767IGT6
STM32F767NIH6
STM32F767BIT6
STM32F767VIT6
STM32F031K6U6
STM32F031F6P6
STM32F031C6T6TR
STM32F030K6T6
STM32F030F4P6
STM32F030C8T6
STM32F030CCT6
STM32F030C6T6
STM32F030RCT6
STM32F030R8T6
STM32F042K6T6
STM32F042F6P6
STM32F042C6T6
STM32F051K8U6
STM32F051K6U6
STM32F051C8T6
STM32F051C8T7TR
STM32F051R8T6
STM32F051R8T7
STM32F071VBT6
STM32F071CBT6
STM32F071CBU6
STM32F071RBT6
STM32F072VBT6
STM32F072CBT6
STM32F072C8T6
STM32F072CBU6TR
STM32F072RBT6
STM32F072R8T6
STM32F070CBT6
STM32F070F6P6
STM32F070RBT6
STM32G474VET6
STM32G431CBT6
STM32G071CBT6
STM32G071GBU6
STM32G071RBT6
STM32G070KBT6
STM32G070CBT6
STM32G070RBT6
STM32G031F8P6
STM32G031K6T6
STM32G031J6M6
STM32G031G8U6
STM32G030K6T6
STM32G030K8T6
STM32G030C8T6
STM32G030F6P6TR
STM32H743BIT6
STM32H743IIT6
STM32H743VIT6
STM32H743VIH6
STM32H743ZIT6
STM32H743XIH6
STM32H750IBK6
STM32H750VBT6
STM32H750XBH6
STM32L151C8T6A
STM32L151CBT6A
STM32L151CBU6
STM32L151CCU6
STM32L151RCT6
STM32L151RET6
STM32L151RDT6
STM32L151VDT6
STM32L431CCT6
STM32L431CBT6
STM32L431CCU6
STM32L431RCT6
STM32L431VCT6
STM32L433VCT6
STM32L433RCT3
STM32L433RCT6
STM32L452REY6TR
STM32L471RGT6
STM32L471RET6
STM32L475VET6
STM32L476RGT6
STM32L476VET6
STM32L476RCT6
STM32L476VGT6
STM32L496RGT6
STM32L011D4P6
STM32L010C6T6
STM32L011F4U6TR
STM32L011G4U6
STM32L031F6P6
STM32L031K6T6
STM32L031G6U6
STM32L051K8U6
STM32L051C8T6
STM32L051R8T6
STM32L052R8T6
STM32L053R8T6
STM32L071RBT6
STM32L071CBT6
STM32L072RBT6
STM32L072CBT6
STM32L073RZT6
STM32L073V8T6
STM8L151C6T6
STM8L151C8T6
STM8L151K4T6
STM8L151K6T6
STM8L151G6U6
STM8L151G4U6
STM8L152C6T6
STM8L152R8T6
STM8L152M8T6
STM8L101F3P6TR
STM8L101K3T6
STM8L101F3U6TR
STM8L001J3M3TR
STM8L051F3P6
STM8L052C6T6
STM8L052R8T6
STM8L050J3M3TR