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參數(shù)資料
| 型號： | UCC35705EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | UCC35705 Evaluation Module(UCC35705評估模塊) |
| 中文描述： | UCC35705評估模塊（UCC35705評估模塊） |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 194K |
| 代理商： | UCC35705EVM |
SLUU141
–
March 2003
5
48-V to 3.3-V RCD Forward with UCC35705 Voltage-Mode Control and Self-Driven Synchronous Rectification
1
Introduction
The UCC35705 voltage mode controller with voltage feed-forward provides the control of this telecom (36 V
DC
to 72 V
DC
) to 3.3-V
DC
converter with synchronous rectification. Capable of supplying 10 A of output current at
3.3 V
DC
with up to 85% efficiency, UCC35705EVM uses self-driven, high-speed, very low R
DS(on)
MOSFETs
for improved efficiency and high-speed operation.
WARNING:
Failure to exercise proper safety precautions or misuse of the module may result
in damage to the module and/or injury to the operator.
2
Features
Full range telecom input 36 V
DC
to 72 V
DC
3.3 V
DC
at 10 A
DC
for 33-W output
1500-V isolation
Business card sized 2.0
”
x 3.5
”
single component side board
Optically isolated voltage mode control with voltage feed-forward
500-kHz high-speed oscillator frequency
Peak 85% efficiency
Peak-by-peak current limit protection
Low input voltage protection
RCD transformer reset clamp
Externally programmable soft-start circuit
3
Description
UCC35705EVM uses the Texas Instruments UCC35705 high-speed, single-ended PWM with voltage
feed-forward in a forward configuration with RCD reset clamp and synchronous rectifier output. This evaluation
module highlights the high-speed capabilities of the UCC35705 PWM, operating at 500 kHz. The UCC35705
is designed to use an external switch driver, allowing the user to select a driver, based on the switching frequency
and switching MOSFET. This also allows the UCC35705 and its sensitive feedback signals to be located in a
lower noise environment further from the high current power devices without lengthening the high-current gate
drive path. UCC35705EVM uses a single TPS2829
±
2-A driver in a 5-pin SOT
–
23 package to provide the high
drive currents necessary for high-speed operation. Constantly improving MOSFET technology and
higher-current MOSFET drivers such as the UCC27324 or UCC27322 would allow for even higher speed
operation.
The self-driving synchronous rectification output stage of the converter dramatically improves efficiency by
reducing the voltage drop through the rectifier stage without additional timing and driver circuitry by using the
transformer
’
s secondary to drive the gates of both synchronous devices.
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| UCC35705P | 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC35705PG4 | 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC35706 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR |
| UCC35706D | 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC35706DG4 | 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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