- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄379480 > UCC3830PWM-4 (Texas Instruments, Inc.) 5-Bit Microprocessor Power Supply Controller PDF資料下載
參數(shù)資料
| 型號(hào)： | UCC3830PWM-4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 5-Bit Microprocessor Power Supply Controller |
| 中文描述： | 5位微處理器電源控制器 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 419K |
| 代理商： | UCC3830PWM-4 |
5
UCC3830-4/-5/-6
The curves shown in Figures 1 and 2 depict the typical
high gain-bandwidth products for the UCC3830-x Voltage
Amplifier, Current Amplifier and Current Sense Ampli-
fiers. These high gain-bandwidth devices help achieve
an excellent transient response to load and line changes.
TYPICAL PERFORMANCE CURVES
Figure 1. Open loop gain for UCC3830 voltage and
current amplifier.
Figure 2. Current sense amplifier gain vs frequency.
Short Circuit Current Limit
The short circuit current limit, I
SC
, is set according to:
1.28V
RSENSE GCSA
ISC =
where R
SENSE
is the average current sense resistor and
G
CSA
is the current sense amplifier gain. G
CSA
equals
15.
Example: Choose R
SENSE
to set the short circuit limit at
17A using the UCC3830-5
1.28V
17A 15=0.005
.
RSENSE =
A lower resistance value may be needed if the AC ripple
current in the inductor is more than 20% of the load cur-
rent.
APPLICATION INFORMATION
Figure 3. Short circuit foldback reduces stress on
circuit components by reducing short circuit current.
VSENSE (Output Voltage Sensing Input):
This pin is
connected to the system output voltage through a low
pass filter. When the voltage on VSENSE rises above or
falls below the COMMAND voltage by 8.5%, the
PWRGOOD
output
is
driven
low
to
reset
the
microprocessor. When the voltage on VSENSE rises
above the COMMAND voltage by 17.5%, the OVP
comparator pulls the current amplifier output voltage
below the oscillator valley voltage to force zero duty
cycle at the GATE output. This pin is also used by the
foldback current limiting circuitry.
PIN DESCRIPTIONS (cont.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC3830PWM-5 | 5-Bit Microprocessor Power Supply Controller |
| UCC3830PWM-6 | 5-Bit Microprocessor Power Supply Controller |
| UCC3830SMD-4 | 5-Bit Microprocessor Power Supply Controller |
| UCC3830DW-5 | 5-Bit Microprocessor Power Supply Controller |
| UCC3830DW-6 | 5-Bit Microprocessor Power Supply Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3830PWM-5 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:5-Bit Microprocessor Power Supply Controller |
| UCC3830PWM-6 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:5-Bit Microprocessor Power Supply Controller |
| UCC3830SMD-4 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:5-Bit Microprocessor Power Supply Controller |
| UCC3830SMD-5 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:5-Bit Microprocessor Power Supply Controller |
| UCC3830SMD-6 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:5-Bit Microprocessor Power Supply Controller |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。