Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

CS5155H Datenblatt(PDF) 9 Page - Cherry Semiconductor Corporation

Teilenummer CS5155H
Bauteilbeschribung  CPU 5-Bit Synchronous Buck Controller
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5155H Datenblatt(HTML) 9 Page - Cherry Semiconductor Corporation

Back Button CS5155H Datasheet HTML 5Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 6Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 7Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 8Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 9Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 10Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 11Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 12Page - Cherry Semiconductor Corporation CS5155H Datasheet HTML 13Page - Cherry Semiconductor Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 14 page
background image
Applications Information: continued
9
Figure 9: CS5155H demonstration board response to 13A load turn off
(output set for 2.8V). V2™ control topology immediately connects
inductor to ground, providing 0% duty cycle. Regulation is achieved in
less than 10µs.
VCC1 Monitor
To maintain predictable startup and shutdown character-
istics an internal VCC1 monitor circuit is used to prevent the
part from operating below 3.75V minimum startup. The
VCC1 monitor comparator provides hysteresis and guaran-
tees a 3.70V minimum shutdown threshold.
Short Circuit Protection
A lossless hiccup mode short circuit protection feature is
provided, requiring only the soft start capacitor to imple-
ment. If a short circuit condition occurs (VFFB < 1V), the VFFB
low comparator sets the FAULT latch. This causes the top
MOSFET to shut off, disconnecting the regulator from it’s
input voltage. The soft start capacitor is then slowly dis-
charged by a 2µA current source until it reaches it’s lower
0.7V threshold. The regulator will then attempt to restart nor-
mally, operating in it’s extended off time mode with a 50%
duty cycle, while the soft start capacitor is charged with a
60µA charge current.
If the short circuit condition persists, the regulator output
will not achieve the 1V low VFFB comparator threshold
before the soft start capacitor is charged to it’s upper 2.5V
threshold. If this happens the cycle will repeat itself until the
short is removed. The soft start charge/discharge current
ratio sets the duty cycle for the pulses (2µA/60µA = 3.3%),
while actual duty cycle is half that due to the extended off
time mode (1.65%).
This protection feature results in less stress to the regulator
components, input power supply, and PC board traces
than occurs with constant current limit protection (see
Figures 10 and 11).
If the short circuit condition is removed, output voltage
will rise above the 1V level, preventing the FAULT latch
from being set, allowing normal operation to resume.
Figure 10: CS5155H demonstration board hiccup mode short circuit pro-
tection. Gate pulses are delivered while the soft start capacitor charges,
and cease during discharge.
Figure 11: Startup with regulator output shorted.
Overvoltage Protection
Overvoltage protection (OVP) is provided as result of the
normal operation of the V2™ control topology and requires
no additional external components. The control loop
responds to an overvoltage condition within 100ns, causing
the top MOSFET to shut off, disconnecting the regulator
from it’s input voltage. The bottom MOSFET is then acti-
vated, resulting in a “crowbar” action to clamp the output
voltage and prevent damage to the load (see Figures 12 and
13). The regulator will remain in this state until the over-
voltage condition ceases or the input voltage is pulled low.
Trace 4 = 5V from PC Power Supply (2V/div.)
Trace 2 = Inductor Switching Node (2V/div.)
Trace 4 - 5V Supply Voltage (2V/div.)
Trace 3 - Soft Start Timing Capacitor (1V/div.)
Trace 2 - Inductor Switching Node (2V/div.)
Protection and Monitoring Features
Trace1 - Regulator Output Voltage (1V/div.)
Trace 2 - Inductor Switching Node (5V/div.)
Trace 3 - Output Current (13 to 0.5 Amps) (20V/div.)


Ähnliche Teilenummer - CS5155H

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
ON Semiconductor
CS5155H ONSEMI-CS5155H Datasheet
623Kb / 17P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 3
CS5155HGD16 ONSEMI-CS5155HGD16 Datasheet
623Kb / 17P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 3
CS5155HGDR16 ONSEMI-CS5155HGDR16 Datasheet
623Kb / 17P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 3
More results

Ähnliche Beschreibung - CS5155H

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Cherry Semiconductor Co...
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
CS5158 CHERRY-CS5158 Datasheet
231Kb / 14P
   CPU 5-Bit Synchronous Buck Controller
logo
ON Semiconductor
CS5161 ONSEMI-CS5161 Datasheet
589Kb / 18P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 12
CS5165H ONSEMI-CS5165H Datasheet
722Kb / 21P
   5?묪it Synchronous CPU Buck Controller
July, 2006 ??Rev. 5
CS5157H ONSEMI-CS5157H Datasheet
432Kb / 16P
   CPU 5?묪it Synchronous Buck Controller
October, 2005 ??Rev. 7
CS5155H ONSEMI-CS5155H Datasheet
623Kb / 17P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 3
CS5157 ONSEMI-CS5157 Datasheet
603Kb / 16P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 7
CS5165 ONSEMI-CS5165 Datasheet
718Kb / 21P
   5?묪it Synchronous CPU Buck Controller
July, 2006 ??Rev. 4
More results


Html Pages

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


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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