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參數(shù)資料
| 型號： | L6997D |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS |
| 中文描述： | 降壓控制器低電壓運作 |
| 文件頁數(shù)： | 14/23頁 |
| 文件大?。?/td> | 291K |
| 代理商： | L6997D |
L6997
14/23
Table 3. PCB Layout guidelines
Table 4. Component list
The component list is shared in two sections: the first for the general-purpose component, the second for power
section:
GENERAL-PURPOSE SECTION
Goal
Suggestion
Low radiation and low magnetic coupling
with the adjacent circuitry.
1) Small switching current loop areas. (For example placing C
IN
, High
Side and Low side MOSFETS, Shottky diode as close as possible).
2) Controller placed as close as possible to the power MOSFET.
3) Group the gate drive component (Boot cap and diode together near
the IC.
Don’t penalty the efficiency.
Keep power traces and load connections short and wide.
Ensure high accuracy in the current sense
system.
Phase pin and PGND pin must be made with Kelvin connection and as
close as possible to the Low Side MOSFETS.
Reduce the noise effect on IC.
1) Put the feedback component (like output divider, integrator network,
etc) as close as possible to the IC.
2) The feedback traces must be parallel and as close as possible.
Moreover they must be routed as far as possible from the switching
current loops..
Part name
Value
Dimension
Notes
RESISTOR
R1, R5, R9, R10
33k
1k
0603
0603
Pull-up resistor
Output resistor divider
(To set output voltage)
R2
R3
R4
1.1k
0603
0603
Input resistor divider
(To set switching frequency)
R6
R7
R8
470k
0
0603
0603
0603
Current limit resistor
CAPACITOR
C1
C2
C3
C4
C5
C6
C9
C10
C11
C8, C12
330pF
N.M.
1nF
100nF
1
μ
F
10nF
10nF
100nF
100nF
47pF
0603
0603
0603
0603
Tantalum
0603
0603
0603
0603
0603
First integrator capacitor
Second integrator capacitor
Softstart capacitor
DIODE
D1
BAR18
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6997DTR | STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6997DTR | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step-Down 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 |
| L6997S | 功能描述:DC/DC 開關(guān)控制器 STEP DOWN CONTROLLER Lo Vltg Operations 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 |
| L6997STR | 功能描述:DC/DC 開關(guān)控制器 3.0 to 5.5V Step-Dwn 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 |
| L6998-0 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-1 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
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