Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

CS3842BGD8 Scheda tecnica(PDF) 5 Page - Cherry Semiconductor Corporation

Il numero della parte CS3842BGD8
Spiegazioni elettronici  Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit
Download  6 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  CHERRY [Cherry Semiconductor Corporation]
Homepage  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS3842BGD8 Scheda tecnica(HTML) 5 Page - Cherry Semiconductor Corporation

  CS3842BGD8 Datasheet HTML 1Page - Cherry Semiconductor Corporation CS3842BGD8 Datasheet HTML 2Page - Cherry Semiconductor Corporation CS3842BGD8 Datasheet HTML 3Page - Cherry Semiconductor Corporation CS3842BGD8 Datasheet HTML 4Page - Cherry Semiconductor Corporation CS3842BGD8 Datasheet HTML 5Page - Cherry Semiconductor Corporation CS3842BGD8 Datasheet HTML 6Page - Cherry Semiconductor Corporation  
Zoom Inzoom in Zoom Outzoom out
 5 / 6 page
background image
Figure 3: Oscillator Timing Network and parameters
VREF
OSC
Gnd
RT
CT
VOSC
Internal Clock
LARGE RT (≈10kΩ)
VREF
Internal Clock
SMALL RT (≈700kΩ)
5
Figure 3: Oscillator
Sawtooth Mode
Triangular Mode
Vupper
Vlower
tc
td
Figure 2: Timing Diagram for key CS-384XB parameters
VCC
IOUT
VOUT
Switch
Current
EA Output
VOSC
OSC
RESET
cycle tends to exceed the maximum allowed, to prevent
transformer saturation in some power supplies, the inter-
nal oscillator waveform provides the maximum duty cycle
clamp as programmed by the selection of oscillator timing
components.
Setting the Oscillator
The oscillator timing capacitor, CT, is charged by VREF
through RT and discharged by an internal current source
(Figure 3). During the discharge time, the internal clock
signal blanks out the output to the Low state, thus provid-
ing a user selected maximum duty cycle clamp.
Charge and discharge times are determined by the general
formulas:
tc = RTCT ln
td = RTCT ln
Substituting in typical values for the parameters in the
above formulas:
VREF = 5.0V, Vupper = 2.7V, Vlower = 1.0V, Id = 8.3mA,
then
tc ≈ 0.5534RTCT
td = RTCT ln
The frequency and maximum duty cycle can be deter-
mined from the Typical Performance Characteristics
graphs.
Grounding
High peak currents associated with capacitive loads neces-
sitate careful grounding techniques. Timing and bypass
capacitors should be connected close to ground in a single
point ground.
The transistor and 5kΩ potentiometer are used to sample
the oscillator waveform and apply an adjustable ramp to
Sense.
)
2.3 – 0.0083 RT
4.0 – 0.0083 RT
(
)
VREF – Id RT –Vlower
VREF – Id RT – Vupper
(
)
VREF – Vlower
VREF – Vupper
(


Codice articolo simile - CS3842BGD8

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
ON Semiconductor
CS3842BGD8 ONSEMI-CS3842BGD8 Datasheet
68Kb / 8P
   Off-Line Current Mode PWM Control Circuit
December, 2001 - Rev. 4
More results

Descrizione simile - CS3842BGD8

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
ON Semiconductor
CS3842B ONSEMI-CS3842B Datasheet
68Kb / 8P
   Off-Line Current Mode PWM Control Circuit
December, 2001 - Rev. 4
CS2842A ONSEMI-CS2842A Datasheet
273Kb / 10P
   Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
July, 2006 ??Rev. 4
logo
Cherry Semiconductor Co...
CS2842A CHERRY-CS2842A Datasheet
156Kb / 6P
   Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
CS52843 CHERRY-CS52843 Datasheet
147Kb / 6P
   Current Mode PWM Control Circuit
logo
ON Semiconductor
CS52843 ONSEMI-CS52843 Datasheet
240Kb / 9P
   Current Mode PWM Control Circuit
July, 2006 ??Rev. 4
CS3845B ONSEMI-CS3845B Datasheet
63Kb / 8P
   Current Mode PWM Control Circuit
December, 2001 - Rev. 7
CS2844 ONSEMI-CS2844 Datasheet
162Kb / 12P
   Current Mode PWM Control Circuit
June, 2001 ??Rev. 3
CS2841B ONSEMI-CS2841B Datasheet
100Kb / 10P
   Automotive Current Mode PWM Control Circuit
September, 2005 ??Rev. 7
logo
Cherry Semiconductor Co...
CS2841B CHERRY-CS2841B Datasheet
162Kb / 6P
   Automotive Current Mode PWM Control Circuit
logo
ON Semiconductor
NCP1251 ONSEMI-NCP1251 Datasheet
275Kb / 24P
   Current-Mode PWM Controller for Off-line Power Supplies
October, 2011 ??Rev. 7
More results


Html Pages

1 2 3 4 5 6


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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