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参数资料
| 型号： | MAX5974EETE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBACK PWM 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 占空比： | 82% |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 管件 |
EVALUATION KIT AVAILABLE
MAX5974E/MAX5974F
Current-Mode PWM Controllers for
Low-Cost Flyback Supplies
General Description
The MAX5974E/MAX5974F provide control for wide-
input-voltage, current-mode PWM, nonisolated, synchro-
nous flyback converters in Power-over-Ethernet (PoE)
powered device (PD) applications. The MAX5974E is
well-suited for universal or telecom input range, while the
MAX5974F also accommodates low input voltage down
to 8.4V.
The devices include several features to enhance supply
efficiency, including a synchronous MOSFET driver out-
put. The AUX driver drives an output synchronous rectifier
to lower conduction losses. Programmable dead time
between the AUX and main driver allows for zero-voltage
switching (ZVS). Under light-load conditions, the devices
reduce the switching frequency (frequency foldback) to
reduce switching losses.
An internal error amplifier with a 1% reference eliminates
the need for an external shunt regulator and optocoupler.
The programmable frequency dithering feature provides
low-EMI, spread-spectrum operation.
The MAX5974E/MAX5974F are available in 16-pin
TQFN-EP packages and are rated for operation over the
-40°C to +85°C temperature range.
Applications
PoE IEEE ? 802.3af/at Powered Devices
High-Power PD (Beyond the 802.3af/at Standard)
IP Phones
Wireless Access Nodes
Features
S Peak Current-Mode Control, Synchronous Flyback
PWM Controller
S Synchronous MOSFET Driver Output
S Internal 1% Error Amplifier Eliminates Shunt
Regulator and Optocoupler
S 100kHz to 600kHz Programmable Q 8% Switching
Frequency, Synchronization Up to 1.2MHz
S Programmable Frequency Dithering for Low-EMI,
Spread-Spectrum Operation
S Programmable Dead Time, PWM Soft-Start,
Current Slope Compensation
S Programmable Feed-Forward Maximum Duty-
Cycle Clamp, 80% Maximum Limit
S Frequency Foldback for High-Efficiency Light-
Load Operation
S Internal Bootstrap UVLO with Large Hysteresis
S 100μA (typ) Startup Supply Current
S Fast Cycle-by-Cycle Peak Current-Limit, 35ns
Typical Propagation Delay
S 115ns Current-Sense Internal Leading-Edge
Blanking
S Output Short-Circuit Protection with Hiccup Mode
S Internal 18V Zero Clamp on Supply Input
S 3mm x 3mm, Lead-Free, 16-Pin TQFN-EP
Security Cameras
Ordering Information
PART
MAX5974E ETE+
MAX5974F ETE+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
UVLO THRESHOLD (V)
16
8.4
TOP MARK
+AIR
+AIS
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5804; Rev 2; 10/13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5974EETE+ | 功能描述:电流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5974EETE+T | 功能描述:电流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5974EEVKIT# | 功能描述:电流型 PWM 控制器 MAX5974E Eval Kit RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5974FETE+ | 功能描述:电流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5974FETE+T | 功能描述:电流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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