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参数资料
| 型号： | UCC2818N |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Low noise low drop voltage regulator with shutdown function |
| 文件页数： | 5/19页 |
| 文件大小： | 296K |
| 代理商： | UCC2818N |
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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相关代理商/技术参数 |
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| UCC2818N | 制造商:Texas Instruments 功能描述:IC PFC PREREG BICMOS 16-PDIP |
| UCC2818NG4 | 功能描述:功率因数校正 IC BiCMOS Power Factor Preregulator RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| UCC2818PW | 功能描述:功率因数校正 IC BiCMOS Power Factor Preregulator RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| UCC2818PWG4 | 功能描述:功率因数校正 IC BiCMOS Power Factor Preregulator RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| UCC2818PWTR | 功能描述:功率因数校正 IC BiCMOS Power Factor Preregulator RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
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