參數(shù)資料
型號： LM2716
廠商： National Semiconductor Corporation
英文描述： Dual (Step-up and Step-down) PWM DC/DC Converter
中文描述： 雙（升壓和降壓）PWM直流/直流轉換器
文件頁數(shù)： 10/17頁
文件大?。?/td> 563K
代理商： LM2716
Buck Operation
(Continued)
COMPENSATION COMPONENTS
In the control to output transfer function, the first pole F
P1
can be estimated as 1/(2
π
R
OUT
C
OUT
); The ESR zero F
Z1
of
the output capacitor is 1/(2
π
ESRC
OUT
); Also, there is a high
frequency pole F
P2
in the range of 45kHz to 150kHz:
F
P2
= F
SW
/(
π
n(1D))
where D = V
OUT
/V
IN
, n = 1+0.348L/(V
IN
V
OUT
) (L is in μHs
and V
IN
and V
OUT
in volts).
The total loop gain G is approximately 500/I
OUT
where I
OUT
is in amperes.
A Gm amplifier is used inside the LM2716. The output resis-
tor R
of the Gm amplifier is about 85k
. C
and R
together with R
o
give a lag compensation to roll off the gain:
F
PC1
= 1/(2
π
C
C1
(R
o
+R
C1
)), F
ZC1
= 1/2
π
C
C1
R
C1
.
In some applications, the ESR zero F
can not be cancelled
by F
. Then, C
is needed to introduce F
PC2
to cancel the
ESR zero, F
P2
= 1/(2
π
C
C3
R
o
\
R
C1
).
The rule of thumb is to have more than 45 phase margin at
the crossover frequency (G=1).
SCHOTTKY DIODE
The breakdown voltage rating of D
1
is preferred to be 25%
higher than the maximum input voltage. Since D1 is only on
for a short period of time, the average current rating for D1
only requires being higher than 30% of the maximum output
current.
L
www.national.com
10
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相關代理商/技術參數(shù)
參數(shù)描述
LM2716MT 制造商:Texas Instruments 功能描述:LCD BUCK, BOOSTER, 2716, TSSOP24
LM2716MT/NOPB 功能描述:IC REG BUCK BST FIX/ADJ 24-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR
LM2716MT-ADJ 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual (Step-up and Step-down) PWM DC/DC Converter
LM2716MTEV 功能描述:電源管理IC開發(fā)工具 LM2716MT EVAL BOARD 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
LM2716MTX 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
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