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參數(shù)資料
| 型號： | UCC3889N |
| 英文描述： | 5 V supervisor with battery switchover |
| 中文描述： | 集成電路電源控制器 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 296K |
| 代理商： | UCC3889N |
SLUS458C AUGUST 2001 REVISED SEPTEMBER 2003
5
www.ti.com
pin assignments
COMP:
This pin provides the output of the error amplifier for compensation. In addition, the COMP pin is
frequently used as a control port by utilizing a secondary-side error amplifier to send an error signal across the
secondary-primary isolation boundary through an opto-isolator.
CS:
The current sense pin is the non-inverting input to the PWM comparator. This is compared to a signal
proportional to the error amplifier output voltage. A voltage ramp can be applied to this pin to run the device with
a voltage mode control configuration.
FB:
This pin is the inverting input to the error amplifier. The non-inverting input to the error amplifier is internally
trimmed to 2.5 V
±
1%.
GND:
Ground return pin for the output driver stage and the logic level controller section.
OUT:
The output of the on-chip drive stage. OUT is intended to directly drive a MOSFET. The OUT pin in the
UCC38C40, UCC38C42 and UCC38C43 is the same frequency as the oscillator, and can operate near 100%
duty cycle. In the UCC38C41, UCC38C44 and the UCC38C45, the frequency of OUT is one-half that of the
oscillator due to an internal T flipflop. This limits the maximum duty cycle to < 50%.
RT/CT:
Timing resistor and timing capacitor. The timing capacitor should be connected to the device ground
using minimal trace length.
VDD:
Power supply pin for the device. This pin should be bypassed with a 0.1-
μ
F capacitor with minimal trace
lengths. Additional capacitance may be needed to provide hold up power to the device during startup.
VREF:
5-V reference. For stability, the reference should be bypassed with a 0.1-
μ
F capacitor to ground using
the minimal trace length possible.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3889N | 制造商:UNITRODE 功能描述:POWER SUPPLY CONTROLLER 3889 DIP8 |
| UCC3889NG4 | 功能描述:電壓模式 PWM 控制器 Off-line Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| UCC388DP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UCC388DPTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Adjustable Voltage Regulator |
| UCC388PW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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