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參數(shù)資料
| 型號： | SP6127EK1L |
| 英文描述： | High-Voltage, Step-Down Controller in TSOT6 |
| 中文描述： | 高電壓，降壓型控制器在TSOT6 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 564K |
| 代理商： | SP6127EK1L |
______________________________________________________
GENERAL OVERVIEW
June 26, 2007 SP6127 TSOT-6 PFET Buck Controller
2007 Sipex Corporation
Page 5
Loop Compensation Example 1
- A converter
utilizing a SP6127 has a 3.3
μ
H inductor and a
22
μ
F/5m
ceramic capacitor. Determine
whether Type-III compensation is needed.
From equation (2)
f
ESRZERO
= 1.45MHz. From
equation (3)
f
DBPOLE
= 18.4 kHz. Since the
condition specified in (1) is not met, Type-III
compensation must be used by adding
external components RZ and CZ. Using
equation (4) CZ is calculated to be 34pF (use
33pF). Following the guideline given in table 1,
a 2k
RZ should be used.
The steps followed in example 1 were used to
compensate the typical application circuit
shown on page 1. Satisfactory frequency
response of the circuit, seen in figure 2,
validates the above procedure.
Loop Compensation Example 2
- A converter
utilizing the SP6127 has a 3.3
μ
H inductor and
a
220
μ
F,
82m
Aluminum
capacitor.
Determine
compensation is needed.
From equation (2)
f
ESRZERO
= 8.8kHz. From
equation (3)
f
DBPOLE
= 5.9kHz. Since the
condition specified in (1) is not met, Type-III
compensation needs to be used by adding
external components RZ and CZ. Using
equation (4) CZ is calculated 108pF (use 100
pF). Since
f
ESRZERO
/
f
DBPOLE
is approximately 2,
RZ must be set at 40k
.
Electrolytic
Type-III
whether
R1
200k, 1%
R2
SP6127
VFB
+
-
RZ2
200k
CZ2
130pF
CP1
2pF
Error Amplif ier
Vref =0.6V
Vout
RZ
CZ
Figure 1- RZ and CZ in conjunction with internal compensation components form a Type-
III compensation network
Figure 2- Satisfactory frequency response of typical application circuit shown on page 1.
Crossover frequency
f
c is 100kHz with a corresponding phase margin of 60 degrees.
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PDF描述 |
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| SP6127 | High-Voltage, Step-Down Controller in TSOT6 |
| SP6128ACY | Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6127EK1-L | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SP6127EK1L/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High-Voltage, Step-Down Controller in TSOT6 |
| SP6127EK1-L/TR | 功能描述:電壓模式 PWM 控制器 High-Voltage Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6128A | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6128A_05 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
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