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參數(shù)資料
| 型號： | SP6126EK1-L |
| 英文描述： | High-Voltage, Step Down Controller in TSOT6 |
| 中文描述： | 高電壓，降壓控制器在TSOT6步 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 477K |
| 代理商： | SP6126EK1-L |
Mar 29-07 RevD SP6126: TSOT-6 PFET Buck Controller
2007 Sipex Corporation
4
The SP6126 is a fixed frequency, voltage-
mode,
non-synchronous
optimized for minimum component, small form
factor and cost effectiveness. It has been
designed for single-supply operation ranging
from 4.5V to 29V. SP6126 has Type-II internal
compensation
for
Electrolytic/Tantalum output capacitors. For
ceramic capacitors Type-III compensation can
be implemented by simply adding an R and C
between output and Feedback. A precision
0.6V reference, present on the positive terminal
of the Error Amplifier, permits programming of
the output voltage down to 0.6V via the FB pin.
The output of the Error Amplifier is internally
compared to a feed-forward (V
IN
/5 peak-to-
peak) ramp and generates the PWM control.
Timing is governed by an internal oscillator that
sets the PWM frequency at 600kHz.
SP6126 contains useful protection features.
Over-current protection is based on high-side
MOSFET’s Rds(on) and is programmable via a
resistor placed at LX node. Under-Voltage
Lock-Out (UVLO) ensures that the controller
starts functioning only when sufficient voltage
exists for powering IC’s internal circuitry.
SP6126 Loop Compensation
The
SP6126
includes
compensation
components
compensation.
External
components are not required for systems with
tantalum or aluminum electrolytic output
capacitors with sufficiently high ESR. Use the
condition below as a guideline to determine
whether or not the internal compensation is
sufficient for your design.
Type-II internal compensation is sufficient if the
following condition is met:
f
f
<
………………. (1)
PWM
controller
use
with
Type-II
internal
loop
for
compensation
DBPOLE
ESRZERO
where:
OUT
ESR
ESRZERO
C
.
R
f
.
.
1
π
=
……….. (2)
OUT
DBPOLE
C
L
f
=
.
.
1
π
………… (3)
Creating a Type-III compensation Network
The above condition requires the ESR zero to
be at a lower frequency than the double-pole
from the LC filter. If this condition is not met,
Type-III compensation should be used and can
be accomplished by placing a series RC
combination in parallel with R1 as shown
below. The value of CZ can be calculated as
follows and RZ selected from table 1.
1
R
C
L
CZ
=
………….. (4)
Table1- Selection of RZ
Figure 1- RZ and CZ in conjunction with
internal compensation components form
a Type-III compensation
f
ESRZERO
÷
f
DBPOLE
1X
2X
3X
5X
>= 10X
RZ
50K
40K
30K
10K
2K
R1
200k, 1%
R2
SP6126
VFB
+
-
RZ2
200k
CZ2
130pF
CP1
2pF
Error Amplifier
Vref=0.6V
Vout
RZ
CZ
GENERAL OVERVIEW
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6127_07 | Evaluation Board Manual |
| SP6127EB | Evaluation Board Manual |
| SP6127EK1 | Evaluation Board Manual |
| SP6127EK1L | High-Voltage, Step-Down Controller in TSOT6 |
| SP6127 | High-Voltage, Step-Down Controller in TSOT6 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6126EK1L/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High-Voltage, Step Down Controller in TSOT6 |
| SP6126EK1-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 |
| SP6127 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6127_07 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6127EB | 功能描述:電源管理IC開發(fā)工具 Eval Board for SP6127 Series RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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