參數(shù)資料
型號(hào)： L6995STR
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, PDSO20
封裝： MO-153-AC, TSSOP-20
文件頁(yè)數(shù)： 6/26頁(yè)
文件大?。?/td> 427K
代理商： L6995STR
L6995S
14/26
Table 8. PCB Layout guidelines
Table 9. 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 CIN, 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.
3) Make the controller ground connection like the figure 19.
Part name
Value
Dimension
Notes
RESISTOR
R1
100
0603
Output resistor divider for the
linear regulator.
R2
300
0603
R3
560k
0603
Input resistor divider
(To set switching frequency)
R4
33k
0603
R5
47
0603
R6, R7, R11, R12
33k
0603
R8
47k
0603
Current limit resistor
(To set current limit)
R9
390
0603
Output resistor divider
(To set output voltage)
R10
1K
0603
R13
220
0603
CAPACITOR
C1
220nF
0805
C2
47
F
KEMET-16V
C3
220nF
0805
C4
330pF
0603
First integrator capacitor
C5
47pF
0603
C6
10nF
0603
C7
N.M.
0603
Second integrator capacitor
C19
220nF
0805
C20
220nF
0603
Softstart capacitor
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6996 功能描述:DC/DC 開(kāi)關(guān)控制器 Step-Down Contrllr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
L6996-1 制造商:Johanson 功能描述:TUNING ROTOR
L6996-13 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6996-16 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6996-17 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
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