Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

NCP3065 Datasheet(PDF) 7 Page - ON Semiconductor

Part # NCP3065
Description  Up to 1.5 A Constant Current Switching Regulator for LEDs
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP3065 Datasheet(HTML) 7 Page - ON Semiconductor

Back Button NCP3065 Datasheet HTML 3Page - ON Semiconductor NCP3065 Datasheet HTML 4Page - ON Semiconductor NCP3065 Datasheet HTML 5Page - ON Semiconductor NCP3065 Datasheet HTML 6Page - ON Semiconductor NCP3065 Datasheet HTML 7Page - ON Semiconductor NCP3065 Datasheet HTML 8Page - ON Semiconductor NCP3065 Datasheet HTML 9Page - ON Semiconductor NCP3065 Datasheet HTML 10Page - ON Semiconductor NCP3065 Datasheet HTML 11Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 18 page
background image
NCP3065, NCV3065
http://onsemi.com
7
INTRODUCTION
The NCP3065 is a monolithic power switching regulator
optimized for LED Driver applications. Its flexible
architecture enables the system designer to directly
implement a step-up or step-down topology with a
minimum number of external components for driving LEDs.
A representative block diagram is shown in Figure 4.
OPERATING DESCRIPTION
The NCP3065 operates as a fixed oscillator frequency
output voltage ripple gated regulator. In general, this mode
of operation is somewhat analogous to a capacitor charge
pump
and
does
not
require
dominant
pole
loop
compensation for converter stability. The typical operating
waveforms are shown in Figure 14. The output voltage
waveform shown is for a step-down converter with the
ripple and phasing exaggerated for clarity. During initial
converter startup, the feedback comparator senses that the
output voltage level is below nominal. This causes the
output switch to turn on and off at a frequency and duty cycle
controlled by the oscillator, thus pumping up the output filter
capacitor. When the feedback voltage level reaches nominal
comparator value, the output switch cycle is inhibited. When
the load current causes the output voltage to fall below the
nominal value feedback comparator enables switching
immediately. Under these conditions, the output switch
conduction can be enabled for a partial oscillator cycle, a
partial cycle plus a complete cycle, multiple cycles, or a
partial cycle plus multiple cycles.
Oscillator
The oscillator frequency and off-time of the output switch
are programmed by the value of the timing capacitor CT.
Capacitor CT is charged and discharged by a 1 to 6 ratio
internal current source and sink, generating a positive going
sawtooth waveform at Pin 3. This ratio sets the maximum
tON/(tON+tOFF) of the switching converter as 6/(6+1) or
85.7% (typical). The oscillator peak and valley voltage
difference is 500 mV typically. To calculate the CT capacitor
value for required oscillator frequency, use the equations
found in Figure 22. An online NCP3065 design tool can be
found at www.onsemi.com, which adds in selecting
component values.
Figure 14. Typical Operating Waveforms
1
0
Output Switch
1
0
On
Off
Feedback Comparator Output
Nominal Output Voltage Level
Startup
Operation
Output Voltage
Timing Capacitor, CT
IPK Comparator Output


Similar Part No. - NCP3065

ManufacturerPart #DatasheetDescription
logo
ON Semiconductor
NCP3063 ONSEMI-NCP3063 Datasheet
259Kb / 16P
   1.5 A, Step?뭊p/Down/Inverting Switching Regulators
November, 2006 ??Rev. 1
NCP3063B ONSEMI-NCP3063B Datasheet
259Kb / 16P
   1.5 A, Step?뭊p/Down/Inverting Switching Regulators
November, 2006 ??Rev. 1
NCP3063BDR2G ONSEMI-NCP3063BDR2G Datasheet
259Kb / 16P
   1.5 A, Step?뭊p/Down/Inverting Switching Regulators
November, 2006 ??Rev. 1
NCP3063BDR2G ONSEMI-NCP3063BDR2G Datasheet
364Kb / 19P
   1.5 A, Step-Up/Down/ Inverting Switching Regulators
November, 2009 ??Rev. 9
NCP3063BMNTXG ONSEMI-NCP3063BMNTXG Datasheet
364Kb / 19P
   1.5 A, Step-Up/Down/ Inverting Switching Regulators
November, 2009 ??Rev. 9
More results

Similar Description - NCP3065

ManufacturerPart #DatasheetDescription
logo
ON Semiconductor
NCP3066 ONSEMI-NCP3066 Datasheet
1Mb / 20P
   Up to 1.5 A Constant Current Switching Regulator for LEDs with ON/OFF Function
January, 2009 ??Rev. 3
logo
STMicroelectronics
A5972D_0808 STMICROELECTRONICS-A5972D_0808 Datasheet
641Kb / 11P
   Up to 1.5 A step down switching regulator for automotive applications
A5973AD_0808 STMICROELECTRONICS-A5973AD_0808 Datasheet
1Mb / 19P
   Up to 1.5 A step down switching regulator for automotive applications
A5973AD STMICROELECTRONICS-A5973AD Datasheet
1Mb / 19P
   Up to 1.5 A step down switching regulator for automotive applications
R5973AD STMICROELECTRONICS-R5973AD Datasheet
1Mb / 38P
   Up to 1.5 A step-down switching regulator for aerospace applications
A5972D STMICROELECTRONICS-A5972D_08 Datasheet
640Kb / 11P
   Up to 1.5 A step down switching regulator for automotive applications
R5972D STMICROELECTRONICS-R5972D Datasheet
1Mb / 35P
   Up to 1.5 A step-down switching regulator for aerospace applications
logo
Feeling Technology Corp...
FP7201 FEELING-FP7201 Datasheet
770Kb / 14P
   Constant Current Switching Regulator for White LED
logo
ON Semiconductor
NCV30161 ONSEMI-NCV30161 Datasheet
252Kb / 10P
   Constant-Current Buck Regulator for Driving High Power LEDs
June, 2019 ??Rev. 1
NSI50350AST3G ONSEMI-NSI50350AST3G Datasheet
201Kb / 7P
   Constant Current Regulator Constant Current Regulator
May, 2012 ??Rev. 3
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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