Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

CS5106 Datasheet(PDF) 9 Page - Cherry Semiconductor Corporation

No. de pieza CS5106
Descripción Electrónicos  Multi-Feature, Synchronous plus Auxiliary PWM Controller
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  CHERRY [Cherry Semiconductor Corporation]
Página de inicio  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5106 Datasheet(HTML) 9 Page - Cherry Semiconductor Corporation

Back Button CS5106 Datasheet HTML 4Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 5Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 6Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 7Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 8Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 9Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 10Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 11Page - Cherry Semiconductor Corporation CS5106 Datasheet HTML 12Page - Cherry Semiconductor Corporation  
Zoom Inzoom in Zoom Outzoom out
 9 / 12 page
background image
9
Figure 1: Startup waveforms.
Voltage and Current Ramp PWM Comparator Inputs
(VFB1,2 and RAMP1,2 leads)
C10 and C11 are the PWM comparators for the auxiliary
and main supplies. The feedback voltage (VFB) is divided
by three and compared with a linear, voltage representa-
tion of the current in the primary side of the transformer
(RAMP). When the output of the feedback comparator
goes ÔhighÕ, a reset signal is sent to the PWM flip-flop and
the GATE driver is driven ÔlowÕ. A 130mV offset on the
RAMP leads allows the drivers to go to 0% duty cycle in
the presence of light loads.
Feedback Voltage for GATE1 Driver (VFB1)
Typically the output of the auxiliary error amplifier (A1) is
tied to VFB1. The VSS output is programmed to 12V by a
10:1 resistive divider on the negative input of the error
amplifier and a fixed 1.2V reference on the positive input
of the error amplifier.
Pulse by Pulse Over Current Protection and Hiccup
Mode (ILIM1,2 leads)
C12 and C13 are the pulse by pulse current limit compara-
tors for the auxiliary and main supplies. When the current
in the primary side of the transformer increases such that
the voltage across the current sense resistor exceeds 1.2V
nominal, the output of the current limit comparator goes
ÔhighÕ and a reset signal is sent to the PWM flip-flop and
the GATE driver is driven ÔlowÕ.
C16 and C17 are the second threshold, pulse by pulse cur-
rent limit comparators for the auxiliary and main supplies.
If the current in the primary side of the transformer
increases so quickly that the current sense voltage is not
limited by C12 or C13 and the voltage across the current
sense resistor exceeds 1.4V, the second threshold compara-
tor will trip a delay circuit and force the GATE driver stage
to go low and stay low for the next two clock cycles.
Undervoltage and Overvoltage Thresholds
C5 and C8 are the undervoltage and overvoltage detection
comparators. Typically, these inputs are tied across the
middle resistor in a three resistor divider with the top
resistor to VIN and bottom resistor to Ground. The under
voltage comparator has 200mV of built in hysteresis with
respect to a direct input on the UVSD lead. The under volt-
age comparator has its positive input referenced to 5V
while the over voltage comparator has its negative input
referenced to 5V. The output of both comparators are
ORed at (G4) with the over current and enable inputs. The
output of G4 feeds the input to the fault latch (F2).
PROGRAM and ENABLE Leads
The PROGRAM lead controls the polarity of the ENABLE
lead. If the PROGRAM lead is ÔhighÕ or floating, the GATE
outputs will go low if the ENABLE input is tied ÔhighÕ or
floating. If the PROGRAM lead is tied low, the GATE out-
puts will go low if the ENABLE input is tied ÔlowÕ. If the
part is then enabled after switching the outputs low, the
part will restart according to the procedure outlined in the
ÒStartupÓ section.
FAULT Logic
If a VREF, UVSD or OVSD fault occurs at any time, G4
resets the fault latch (F2). RUN1 goes low and all gate
drivers cease switching and return to their ÔlowÕ state.
When RUN1 goes low, the output of the auxiliary op-amp
(A1) discharges the soft start capacitor and holds it low
while RUN1 is low. If the fault condition is removed before
the OUVDELAY timer is tripped, the IC will restart the
power supplies when VSS < 1.4V. If the OUVDELAY timer
trips, the power supply must be restarted as explained in
the following section.
Output Undervoltage Delay Timer for the Main and
Auxiliary Regulated Outputs
C7 and C4 are the output under voltage monitor compara-
tors for the auxiliary and main supplies. If a regulated out-
put drops such that its associated VFB voltage exceeds 4.1V,
the output undervoltage monitor comparator goes ÔhighÕ
and the OUVDELAY capacitor begins charging from 0V. A
timing relation is set up by a 10µA nominal current source,
the OUVDELAY capacitor and a 5V fault threshold at the
input of C2 (see Figure 2). If any regulated output drops
and stays low for the entire charge time of the OUVDELAY
capacitor, a fault is triggered and all GATE drivers will go
into a low state.
Once this fault is triggered, the IC will restart the power
supplies only if the OUVDELAY fault is reset and ENABLE
or UVSD is toggled while VSS < 1.4V. To reset the OUVDE-
LAY fault, both the VFB inputs must be less than 4.1V. In
the application circuit shown, VFB1 is brought low by
OAOUT when RUN1 stops the oscillators. VFB2 is brought
low when VAUXP bleeds down and the VFB2 opto-isolator is
no longer powered.
Figure 2: OUVDELAY Time vs. OUVDELAY Capacitance
CAPACITANCE (nF)
0.01
100
1
0.1
10
1
100
1000
0.1
10
1000
VSS > VCC
7.5V
VCC
VREF,VREF(OK),RUN1
CLK1
GATE1
RAMP1
VFB1
VSS
VFB2
RUN2
CLK2
GATE2
RAMP2
GATE2B
Theory of Application: continued


Número de pieza similar - CS5106

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Cherry Semiconductor Co...
CS5101 CHERRY-CS5101 Datasheet
153Kb / 7P
   Secondary Side Post Regulator for AC/DC and DC/DC Multiple Output Converters
logo
ON Semiconductor
CS5101 ONSEMI-CS5101 Datasheet
142Kb / 9P
   Secondary Side Post Regulator for AC/DC and DC/DC Multiple Output Converters
October, 2006 ??Rev. 6
logo
Cirrus Logic
CS5101A CIRRUS-CS5101A Datasheet
466Kb / 40P
   16-Bit, 100kHz/ 20kHz A/D Converters
CS5101A CIRRUS-CS5101A Datasheet
574Kb / 39P
   16-bit, 100 kSps / 20 kSps A/D Converters
CS5101A-AL8 CIRRUS-CS5101A-AL8 Datasheet
466Kb / 40P
   16-Bit, 100kHz/ 20kHz A/D Converters
More results

Descripción similar - CS5106

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Diodes Incorporated
AP2014 DIODES-AP2014_09 Datasheet
270Kb / 14P
   SYNCHRONOUS PWM CONTROLLER
AP2014/A Rev. 5
logo
ON Semiconductor
NCP3011 ONSEMI-NCP3011_15 Datasheet
369Kb / 28P
   Synchronous PWM Controller
September, 2015 ??Rev. 4
NCV3011DTBR2G ONSEMI-NCV3011DTBR2G Datasheet
412Kb / 28P
   Synchronous PWM Controller
June, 2011 ??Rev. 3
logo
Anachip Corp
AP2002 ANACHIP-AP2002 Datasheet
180Kb / 7P
   Synchronous PWM Controller
AP2007 ANACHIP-AP2007 Datasheet
181Kb / 7P
   Synchronous PWM Controller
logo
ON Semiconductor
NCP3012 ONSEMI-NCP3012 Datasheet
354Kb / 26P
   Synchronous PWM Controller
May, 2010 ??Rev. 0
NCV3020ADR2G ONSEMI-NCV3020ADR2G Datasheet
778Kb / 23P
   Synchronous PWM Controller
January, 2013 ??Rev. 6
NCP3030A ONSEMI-NCP3030A Datasheet
375Kb / 23P
   Synchronous PWM Controller
April, 2011 ??Rev. 1
logo
Anachip Corp
AP2003 ANACHIP-AP2003 Datasheet
132Kb / 6P
   Synchronous PWM Controller
logo
ON Semiconductor
NCP3020A ONSEMI-NCP3020A_10 Datasheet
759Kb / 23P
   Synchronous PWM Controller
November, 2010 ??Rev. 3
More results


Html Pages

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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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