参数资料
| 型号： | UCC28250PW |
| 厂商： | Texas Instruments |
| 文件页数： | 1/53页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM/VM 20-TSSOP |
| 标准包装： | 70 |
| PWM 型： | 电流/电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 100% |
| 电源电压： | 4.7 V ~ 17 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
| 其它名称： | 296-27776-5 UCC28250PW-ND |
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SLUSA29C – APRIL 2010 – REVISED JULY 2011
Advanced PWM Controller With Pre-Bias Operation
Check for Samples: UCC28250
1
FEATURES
DESCRIPTION
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Pre-biased Startup
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
1% Accurate Cycle-by-Cycle Over Current
Protection with Matched Duty Cycle Outputs
Programmable Soft-Start and Hiccup Restart
Timer
Thermally Enhanced 4-mm x 4-mm QFN-20
Package and 20-pin TSSOP Package
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.
Externally programmable soft-start, used in
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.
The oscillator operates at frequencies up to 2 MHz,
APPLICATIONS
? Half-Bridge, Full-Bridge, Interleaved Forward,
and Push-Pull Isolated Converters
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,
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Telecom and Data-com Power
Wireless Base Station Power
Server Power
Industrial Power Systems
VIN (36 V ~ 75 V)
output voltage and temperature protection can be
implemented. Dead time between primary-side switch
and secondary-side synchronous rectifiers can be
independently programmed.
Simplified Application Diagram
VIN (36 V ~ 75 V)
UCC28250
UCC27200
V OUT
OVP
RAMP
RT
OUTA
OUTB
SRA
HI
LO
HI
LO
Isolation
UCC2732x
SS
SRB
COMP
Feedback and Isolation
GND
Not Shown: PS, SP, HICC, VDD, EA+, EA-, VREF, EN, ILIM, AND VSENSE
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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 – 2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UCC28250PW | 制造商:Texas Instruments 功能描述:PWM CONTROLLER IC 17V TSSOP-20 制造商:Texas Instruments 功能描述:IC, PWM CONTROLLER, 17V, TSSOP-20 |
| UCC28250PWR | 功能描述:电压模式 PWM 控制器 Adv PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| UCC28250PWT | 制造商:TI 制造商全称:Texas Instruments 功能描述:Advanced PWM Controller With Pre-Bias Operation |
| UCC28250RGPR | 功能描述:电压模式 PWM 控制器 Adv PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| UCC28250RGPT | 功能描述:电压模式 PWM 控制器 Adv PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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