データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

CS5151GN16 データシート(PDF) 7 Page - Cherry Semiconductor Corporation

部品番号 CS5151GN16
部品情報  CPU 4-Bit Nonsynchronous Buck Controller
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  CHERRY [Cherry Semiconductor Corporation]
ホームページ  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5151GN16 データシート(HTML) 7 Page - Cherry Semiconductor Corporation

Back Button CS5151GN16 Datasheet HTML 3Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 4Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 5Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 6Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 7Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 8Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 9Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 10Page - Cherry Semiconductor Corporation CS5151GN16 Datasheet HTML 11Page - Cherry Semiconductor Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 14 page
background image
7
Applications Information: continued
If the input voltage rises quickly, or the regulator output is
enabled externally, output voltage will increase to the level
set by the error amplifier output more rapidly, usually
within a couple of cycles (see Figure 4).
Figure 4: CS5151 demonstration board enable startup waveforms.
Normal Operation
During normal operation, switch off time is constant and
set by the COFF capacitor. Switch on time is adjusted by the
V2™ control loop to maintain regulation. This results in
changes in regulator switching frequency, duty cycle, and
output ripple in response to changes in load and line.
Output voltage ripple will be determined by inductor rip-
ple current working into the ESR of the output capacitors
(see Figures 5 and 6).
Figure 5: Peak-to-peak ripple on VOUT = 2.8V, IOUT = 0.5A (light load).
Figure 6: Peak-to-peak ripple on VOUT = 2.8V, IOUT = 13A (heavy load).
Transient Response
The CS5151 V2™ control loop’s 100ns reaction time pro-
vides unprecedented transient response to changes in
input voltage or output current. Pulse by pulse adjustment
of duty cycle is provided to quickly ramp the inductor cur-
rent to the required level. Since the inductor current cannot
be changed instantaneously, regulation is maintained by
the output capacitor(s) during the time required to slew the
inductor current.
Overall load transient response is further improved
through a feature called “adaptive voltage positioning”.
This technique pre-positions the output capacitor’s voltage
to reduce total output voltage excursions during changes
in load.
Holding tolerance to 1% allows the error amplifier’s refer-
ence voltage to be targeted +40mV high without compro-
mising DC accuracy. A “droop resistor“, implemented
through a PC board trace, connects the error amplifier’s
feedback pin (VFB) to the output capacitors and load and
carries the output current. With no load, there is no DC
drop across this resistor, producing an output voltage
tracking the error amplifier’s, including the +40mV offset.
When the full load current is delivered, an 80mV drop is
developed across this resistor. This results in output volt-
age being offset -40mV low.
The result of adaptive voltage positioning is that additional
margin is provided for a load transient before reaching the
output voltage specification limits. When load current sud-
denly increases from its minimum level, the output capaci-
tor is pre-positioned +40mV. Conversely, when load cur-
rent suddenly decreases from its maximum level, the out-
put capacitor is pre-positioned -40mV (see Figures 7, 8, and
9). For best transient response, a combination of a number
of high frequency and bulk output capacitors are usually
used.
Trace1 - Regulator Output Voltage (10V/div.)
Trace 2 - Inductor Switching Node (5V/div.)
Trace 1 - Regulator Output Voltage (10V/div.)
Trace 2 - Inductor Switching Node (5V/div.)
Trace 1 - Regulator Output Voltage (5V/div.)
Trace 2 - Inductor Switching Node (5V/div.)


同様の部品番号 - CS5151GN16

メーカー部品番号データシート部品情報
logo
ON Semiconductor
CS5151GN16 ONSEMI-CS5151GN16 Datasheet
572Kb / 17P
   CPU 4?묪it Nonsynchronous Buck Controller
July, 2006 ??Rev. 4
More results

同様の説明 - CS5151GN16

メーカー部品番号データシート部品情報
logo
Cherry Semiconductor Co...
CS5156 CHERRY-CS5156 Datasheet
308Kb / 14P
   CPU 5-Bit Nonsynchronous Buck Controller
logo
ON Semiconductor
CS5151H ONSEMI-CS5151H Datasheet
560Kb / 16P
   CPU 4?묪it Nonsynchronous Buck Controller
July, 2006 ??Rev. 4
CS5151 ONSEMI-CS5151 Datasheet
572Kb / 17P
   CPU 4?묪it Nonsynchronous Buck Controller
July, 2006 ??Rev. 4
CS5156 ONSEMI-CS5156 Datasheet
576Kb / 17P
   CPU 5?묪it Nonsynchronous Buck Controller
July, 2006 ??Rev. 11
logo
Cherry Semiconductor Co...
CS5150H CHERRY-CS5150H Datasheet
322Kb / 14P
   CPU 4-Bit Synchronous Buck Controller
CS5150 CHERRY-CS5150 Datasheet
236Kb / 14P
   CPU 4-Bit Synchronous Buck Controller
CS5155H CHERRY-CS5155H Datasheet
238Kb / 14P
   CPU 5-Bit Synchronous Buck Controller
CS5157 CHERRY-CS5157 Datasheet
316Kb / 14P
   CPU 5-Bit Synchronous Buck Controller
CS5155 CHERRY-CS5155 Datasheet
279Kb / 14P
   CPU 5-Bit Synchronous Buck Controller
CS5157H CHERRY-CS5157H Datasheet
236Kb / 14P
   CPU 5-Bit Synchronous Buck Controller
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com