参数资料
| 型号： | UCC28051EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR UCC28051 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，功率因数校正 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | UCC28051 |
| 主要属性： | 100 W，85 ~ 265 VAC 输入，400 VDC 稳压输出 |
| 已供物品： | 板 |
| 产品目录页面： | 1052 (CN2011-ZH PDF) |
| 相关产品： | UCC38051PE4-ND - IC PFC CTRLR TRANSITION 8DIP UCC38051DRG4-ND - IC PFC CTRLR TRANSITION 8SOIC UCC38051DR-ND - IC PFC CTRLR TRANSITION 8SOIC UCC38051DG4-ND - IC PFC CTRLR TRANSITION 8SOIC UCC38050PE4-ND - IC PFC CTRLR TRANSITION 8DIP UCC38050DRG4-ND - IC PFC CTRLR TRANSITION 8SOIC UCC38050DR-ND - IC PFC CTRLR TRANSITION 8SOIC UCC38050DG4-ND - IC PFC CTRLR TRANSITION 8SOIC UCC28051PE4-ND - IC PFC CTRLR TRANSITION 8DIP UCC28051DRG4-ND - IC PFC CTRLR TRANSITION 8SOIC 更多... |
| 其它名称： | 296-19036 |
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UCC28050, UCC28051
UCC38050, UCC38051
SLUS515F?SEPTEMBER 2002 ? REVISED MARCH 2009
APPLICATION INFORMATION
Sense Resistor Selection
The current sense resistor value must be chosen to limit the output power and it must also use the full dynamic
range of the multiplier during normal steady state operation. The value of R S1 is thus selected for maximum
power operation at low ac line voltage conditions. In order to use the full dynamic range, set the V SENSE
threshold as a function of the dynamic input range of V COMP and the peak of the minimum MULTIN voltage.
R S1 +
0.67
COMP (MAX) * COMP (MIN)
2 2
MULTIN (PEAK)@VAC(min) * 0.075
P IN(max)
V AC(min)
(12)
where:
D COMP (MAX) = 3.8 V
D COMP (MIN) = 2.5 V
D MULTIN (PEAK)@VAC(min) + 2
V AC(min)
R AC2
R AC2 ) R AC1
If the exact value R S1 is not available. R S2 and R S3 can be added for further scaling. The CS pin already has
an internal filter for noise due to switching transients. Additional filtering at switching transient frequencies can
be achieved by adding C S1 .
Output Voltage Sense Design
Select the divider ratio of R O1 and R O2 to set the VO_SNS voltage to 2.5 V at the desired output voltage. The
current through the divider should be at least 200 μ A.
Voltage Loop Design
How well the voltage control loop is designed directly impacts line current distortion. UCC38050 employs a
transconductance amplifier (g M amp) with gain scheduling for improved transient response (refer to Figure 14.
g M Amplifier Output Current vs. Current Sense Voltage ). Integral type control at low frequencies is preferred
here because the loop gain varies considerably with line conditions. The largest gain occurs at maximum line
voltage. If the power factor corrector load is dc-to-dc switching converter, the small signal model of the controller
and the power factor corrector, from COMP to PFC output voltage is given by:
^
V OUT (s)
^
V COMP (s)
+
V OUT(avg)
k 1
R S1
2
V AC
k CRM
C OUT
1
S
(13)
D V OUT = small signal variations in V OUT
D V COMP = small signal variations in V COMP
where:
^
^
D k 1 = multiplier gain = 0.65
D k CRM = peak to average factor = 2
14
www.ti.com
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| UCC28051P | 功能描述:功率因数校正 IC for low-med pwr app w/IEC1000-3-2 cmplnc 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 |
| UCC28051PE4 | 功能描述:功率因数校正 IC for low-med pwr app w/IEC1000-3-2 cmplnc 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 |
| UCC2805D | 功能描述:电流型 PWM 控制器 Low-Power BiCMOS Current-Mode PWM RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2805D | 制造商:Texas Instruments 功能描述:IC CURRENT MODE PWM 10V 8-SOIC 制造商:Texas Instruments 功能描述:IC, CURRENT MODE PWM, 10V, 8-SOIC |
| UCC2805DG4 | 功能描述:电流型 PWM 控制器 Low-Power BiCMOS Current-Mode PWM RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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