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參數(shù)資料
| 型號： | TPS65140RGE |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD |
| 中文描述： | 三路輸出液晶供應線性穩(wěn)壓器和電源良好 |
| 文件頁數(shù)： | 15/24頁 |
| 文件大?。?/td> | 865K |
| 代理商： | TPS65140RGE |
www.ti.com
Load Step
Compensation
VIN
COMP
R
C
15 k
C
C
1 nF
fz
1
2
Cc
Rc
C
C
= 4.7 nF
TPS65140
TPS65145
SLVS497B–SEPTEMBER 2003–REVISED MARCH 2004
Figure 16. Load Step Caused By A Too Large Feedforward Capacitor Value
The regulator loop can be compensated by adjusting the external components connected to the COMP pin. The
COMP pin is connected to the output of the internal transconductance error amplifier. A typical compensation
scheme is shown in Figure 17.
Figure 17. Compensation Network
The compensation capacitor C
c
adjusts the low frequency gain, and the resistor value adjusts the high frequency
gain. The following formula calculates at what frequency the resistor increases the high frequency gain.
Lower input voltages require a higher gain and a lower compensation capacitor value. A good start is C
c
= 1 nF
for a 3.3-V input and C
c
= 2.2 nF for a 5-V input. If the device operates over the entire input voltage range from
2.7 V to 5.8 V, a larger compensation capacitor up to 10 nF is recommended. Figure 18 shows the load transient
with a larger compensation capacitor, and Figure 19 shows a smaller compensation capacitor.
Figure 18. C
C
= 4. 7 nF
15
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65140RGER | 功能描述:LCD 驅動器 Trp-Ch 2.1-A Swit Boost Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65140RGERG4 | 功能描述:LCD 驅動器 Trp-Ch 2.1-A Swit Boost Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65141PWP | 功能描述:LCD 驅動器 5V/1.6A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65141PWPG4 | 功能描述:LCD 驅動器 5V/1.6A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65141PWPR | 功能描述:LCD 驅動器 5V/1.6A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
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