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參數(shù)資料
| 型號： | CS5151HGDR16 |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 197K |
| 代理商： | CS5151HGDR16 |
CS5151H
http://onsemi.com
13
EMI Management
As a consequence of large currents being turned on and off
at high frequency, switching regulators generate noise as a
consequence of their normal operation. When designing for
compliance
with
EMI/EMC
regulations,
additional
components may be added to reduce noise emissions. These
components are not required for regulator operation and
experimental results may allow them to be eliminated. The
input filter inductor may not be required because bulk filter
and bypass capacitors, as well as other loads located on the
board will tend to reduce regulator di/dt effects on the circuit
board and input power supply. Placement of the power
component to minimize routing distance will also help to
reduce emissions.
Figure 18. Filter Components
1000 pF
33
2.0
H
Figure 19. Input Filter
1200 pF
× 3.0/16 V
2.0
H
+
Layout Guidelines
1. Place 12 V filter capacitor next to the IC and connect
capacitor ground to pin 11 (PGND).
2. Connect pin 11 (PGND) with a separate trace to the
ground terminals of the 5.0 V input capacitors.
3. Place fast feedback filter capacitor next to pin 8 (VFFB)
and connect it’s ground terminal with a separate, wide
trace directly to pin 14 (LGND).
4. Connect the ground terminals of the Compensation
capacitor directly to the ground of the fast feedback
filter capacitor to prevent common mode noise from
effecting the PWM comparator.
5. Place the output filter capacitor(s) as close to the load
as possible and connect the ground terminal to pin 14
(LGND).
6. To implement adaptive voltage positioning, connect
both slow and fast feedback pins 16 (VFB) and 8
(VFFB) to the regulator output right at the inductor
terminal. Connect inductor to the output capacitors via
a trace with the following resistance:
RTRACE +
80 mV
IMAX
This causes the output voltage to be +40 mV with no
load, and –40 mV with a full load, improving regulator
transient response. This trace must be wide enough to
carry the full output current. (Typical trace is 1.0 inch
long, 0.17 inch wide). Care should be taken to
minimize any additional losses after the feedback
connection point to maximize regulation.
7. If DC regulation is to be optimized (at the expense of
degraded transient regulation), adaptive voltage
positioning can be disabled by connecting to VFB pin
directly to the load with a separate trace (remote
sense).
8. Place 5.0 V input capacitors close to the switching
MOSFET.
Route gate drive signals VGATE (pin 10) with a trace
that is a minimum of 0.025 inches wide.
Figure 20. Layout Guidelines
To the negative terminal of the output capacitors
VCC
100 pF
0.1
F
SOFT START
OFF TIME
VCOMP
To the negative terminal
of the input capacitors
15
11
5
8
VFFB
1.0
F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CS-5151N16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| CS-5155D16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| CS-5155DR16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| CS5155GDR16 | 功能描述:IC CTRLR BUCK SYNC 5BIT 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| CS-5155HD16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
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