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UCC28250PWR PDF预览

UCC28250PWR

更新时间： 2024-02-20 07:58:13
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
50页 760K
描述
Advanced PWM Controller With Pre-Bias Operation

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UCC28250PWR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFN
包装说明：QFN-20针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：0.87Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT/VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：17 V
最小输入电压：4.7 V标称输入电压：12 V
JESD-30 代码：S-PQCC-N20JESD-609代码：e4
长度：4 mm湿度敏感等级：2
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电压：3.38 V最小输出电压：3.22 V
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC20,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.93 mm
子类别：Switching Regulator or Controllers最大供电电流 (Isup)：3.4 mA
标称供电电压 (Vsup)：12 V表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：1150 kHz
温度等级：AUTOMOTIVE端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

UCC28250PWR 数据手册

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UCC28250  
www.ti.com  
SLUSA29B –APRIL 2010–REVISED OCTOBER 2010  
Advanced PWM Controller With Pre-Bias Operation  
Check for Samples: UCC28250  
1
FEATURES  
DESCRIPTION  
•
Pre-biased Startup  
The UCC28250 PWM controller is designed for high  
power density applications that may have stringent  
pre-biased startup requirements. The UCC28250’s  
integrated synchronous rectifier control outputs target  
high efficiency and high performance topologies such  
as half-bridge, full-bridge, interleaved forward, and  
push-pull. The UCC27200 half bridge drivers and  
UCC2732X MOSFET drivers used in conjunction with  
the UCC28250 provide a complete power converter  
solution.  
•
Synchronous Rectifier Control Outputs with  
Programmable Delays (Including Zero Delay  
Support)  
•
Voltage Mode Control with Input Voltage  
Feed-Forward or Current Mode Control  
•
•
•
•
Primary or Secondary-Side Control  
3.3-V, 1.5% Accurate Reference Output  
1-MHz Capable Switching Frequency  
Externally  
programmable  
soft-start,  
used  
in  
1% Accurate Cycle-by-Cycle Over Current  
Protection with Matched Duty Cycle Outputs  
conjunction with an internal pre-biased startup circuit,  
allows the controller to gradually reach a steady-state  
operating point under all output conditions. The  
UCC28250 can be configured for primary or  
secondary-side control and either voltage or current  
mode control can be implemented.  
•
•
Programmable Soft-Start and Hiccup Restart  
Timer  
Thermally Enhanced 4-mm x 4-mm QFN-20  
Package and 20-pin TSSOP Package  
The oscillator operates at frequencies up to 2 MHz,  
and can be synchronized to an external clock. Input  
voltage feedforward, cycle-by-cycle current limit, and  
a programmable hiccup timer allow the system to  
stay within a safe operation range. Input voltage,  
output voltage and temperature protection can be  
implemented. Dead time between primary-side switch  
and secondary-side synchronous rectifiers can be  
independently programmed.  
APPLICATIONS  
•
Half-Bridge, Full-Bridge, Interleaved Forward,  
and Push-Pull Isolated Converters  
•
•
•
•
Telecom and Data-com Power  
Wireless Base Station Power  
Server Power  
Industrial Power Systems  
Simplified Application Diagram  
VIN (36 V ~ 75 V)  
VIN (36 V ~ 75 V)  
UCC27200  
UCC28250  
VOUT  
OVP  
OUTA  
OUTB  
SRA  
HI  
HI  
RAMP  
RT  
LO  
LO  
Isolation  
UCC2732x  
SS  
SRB  
COMP  
Feedback and Isolation  
GND  
Not Shown: PS, SP, HICC, VDD, EA+, EA-, VREF, EN, ILIM, AND VSENSE  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2010, Texas Instruments Incorporated  
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