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| 型号： | UCC38051PE4 |
| 厂商： | Texas Instruments |
| 文件页数： | 13/32页 |
| 文件大小： | 0K |
| 描述： | IC PFC CTRLR TRANSITION 8DIP |
| 标准包装： | 50 |
| 模式： | 间歇（跃迁） |
| 频率 - 开关： | 200kHz |
| 电流 - 启动： | 75µA |
| 电源电压： | 12 V ~ 18 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 配用： | 296-19036-ND - EVAL MODULE FOR UCC28051 |
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UCC28050, UCC28051
UCC38050, UCC38051
SLUS515F?SEPTEMBER 2002 ? REVISED MARCH 2009
APPLICATION INFORMATION
Diode Selection
The effects of the reverse recovery current in the diode can be eliminated with relatively little negative impact
to the system. The diode selection is based on reverse voltage, forward current, and switching speed.
I D(avg) + I OUT(avg)
(6)
I D(rms) + I L(peak)
V D(peak) + V OUT
2
p
V AC
V OUT
(7)
(8)
Capacitor Selection
The hold-up time is the main requirement in determining the output capacitance. ESR and the maximum RMS
ripple current rating may also be important especially at higher power levels.
P OUT
t HOLDUP
C OUT(min) +
2
2
V OUT * V OUT(min)
2
(9)
where:
D V OUT(min) = minimum regulator input voltage for operation
I C(rms) +
I L(peak)
2
2
p
V AC(max)
V OUT
*
P OUT
V OUT
2
) (ac rms load currents)
2
(10)
Multiplier Set-Up
Select R AC1 and R AC2 so that their ratio uses the full dynamic range of the multiplier input at the peak line voltage
yet, their values are small enough to make the effects of the multiplier bias current negligible. In order to use
the maximum range of the multiplier, select the divider ratio so that V MULTIN evaluated at the peak of the
maximum ac line voltage is the maximum of the minimum dynamic input range of MULTIN, which is 2.5 V.
Choose R AC1 so that it has at least 100- μ A at the peak of the minimum ac operating line voltage.
R AC1
R AC2
+
2
2.5
V AC(max) * 1
(11)
In extreme cases, switching transients can contaminate the MULTIN signal and it can be beneficial to add
capacitor C AC1 . Select the value of C AC1 so that the corner frequency of the resulting filter is greater than the
lowest switching frequency. Keep in mind that the low corner frequency of this filter may compromise the overall
power factor.
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| UCC3805D | 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 |
| UCC3805DG4 | 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 |
| UCC3805DTR | 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 |
| UCC3805DTR/81222G4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Low-Power BiCMOS Current-Mode PWM |
| UCC3805DTRG4 | 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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