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UCC3808-2 PDF预览

UCC3808-2

更新时间： 2024-11-27 22:59:31
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
7页 150K
描述
Low Power Current Mode Push-Pull PWM

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UCC3808-2 数据手册

 浏览型号UCC3808-2的Datasheet PDF文件第2页浏览型号UCC3808-2的Datasheet PDF文件第3页浏览型号UCC3808-2的Datasheet PDF文件第4页浏览型号UCC3808-2的Datasheet PDF文件第5页浏览型号UCC3808-2的Datasheet PDF文件第6页浏览型号UCC3808-2的Datasheet PDF文件第7页 
UCC1808-1/-2  
UCC2808-1/-2  
UCC3808-1/-2  
Low Power Current Mode Push-Pull PWM  
FEATURES  
DESCRIPTION  
• 130µA Typical Starting Current  
The UCC3808 is a family of BiCMOS push-pull, high-speed, low power,  
pulse width modulators. The UCC3808 contains all of the control and drive  
circuitry required for off-line or DC-to-DC fixed frequency current-mode  
switching power supplies with minimal external parts count.  
• 1mA Typical Run Current  
• Operation to 1MHz  
• Internal Soft Start  
The UCC3808 dual output drive stages are arranged in a push-pull configu-  
ration. Both outputs switch at half the oscillator frequency using a toggle  
flip-flop. The dead time between the two outputs is typically 60ns to 200ns  
depending on the values of the timing capacitor and resistors, thus limits  
each output stage duty cycle to less than 50%.  
• On Chip Error Amplifier With 2MHz  
Gain Bandwidth Product  
• On Chip VDD Clamping  
The UCC3808 family offers a variety of package options temperature range  
options, and choice of undervoltage lockout levels. The family has UVLO  
thresholds and hysteresis options for off-line and battery powered systems.  
Thresholds are shown in the table below.  
• Dual Output Drive Stages In Push-Pull  
Configuration  
• Output Drive Stages Capable Of  
500mA Peak Source Current, 1A  
Peak Sink Current  
Part Number  
UCCx808-1  
UCCx808-2  
Turn on Threshold  
Turn off Threshold  
12.5V  
4.3V  
8.3V  
4.1V  
BLOCK DIAGRAM  
FB  
2
COMP  
1
CS  
3
8
7
VDD  
OVERCURRENT  
COMPARATOR  
PEAK CURRENT  
COMPARATOR  
14V  
0.75V  
2.0V  
0.5V  
2.2V  
OUTA  
VDD OK  
VDD–1V  
OSCILLATOR  
S
R
S
R
0.8V  
PWM  
COMPARATOR  
Q
Q
PWM  
LATCH  
1.2R  
Q
Q
S
Q
R
T
VDD  
0.5V  
R
SOFT START  
6
5
OUTB  
GND  
VOLTAGE  
REFERENCE  
SLOPE = 1V/ms  
4
RC  
UDG-99076  
04/99  
1234567

中文翻译

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UCC3808-2 替代型号

型号 品牌 替代类型 描述 数据表
UCC2808-2 TI

功能相似

 Low Power Current Mode Push-Pull PWM

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