Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

MC33067DWR2G Arkusz danych(PDF) 10 Page - ON Semiconductor

Numer części MC33067DWR2G
Szczegółowy opis  High Performance Resonant Mode Controllers
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC33067DWR2G Arkusz danych(HTML) 10 Page - ON Semiconductor

Back Button MC33067DWR2G Datasheet HTML 6Page - ON Semiconductor MC33067DWR2G Datasheet HTML 7Page - ON Semiconductor MC33067DWR2G Datasheet HTML 8Page - ON Semiconductor MC33067DWR2G Datasheet HTML 9Page - ON Semiconductor MC33067DWR2G Datasheet HTML 10Page - ON Semiconductor MC33067DWR2G Datasheet HTML 11Page - ON Semiconductor MC33067DWR2G Datasheet HTML 12Page - ON Semiconductor MC33067DWR2G Datasheet HTML 13Page - ON Semiconductor MC33067DWR2G Datasheet HTML 14Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
MC34067, MC33067
http://onsemi.com
10
The totem−pole output drivers are ideally suited for driving
power MOSFETs and are capable of sourcing and sinking
1.5 A. Rise and fall times are typically 20 ns and 15 ns
respectfully when driving a 1.0 nF load. High source/sink
capability in a totem−pole driver normally increases the risk
of high cross conduction current during output transitions.
The MC34067 utilizes a unique design that virtually
eliminates cross conduction, thus controlling the chip power
dissipation at high frequencies. A separate power ground pin
is provided to isolate the sensitive analog circuitry from large
transient currents.
Figure 19. Undervoltage Lockout and Reference
8.0 V
Vref
15
9
VCC
5
Vref
4.2/4.0 V
Vref UVLO
VCC UVLO
7.0k
50k
7.0k
50k
5.1 V
Reference
Enable /
UVLO Adjust
UVLO
PERIPHERAL SUPPORT FUNCTIONS
The MC34067 Resonant Controller provides a number of
support and protection functions including a precision
voltage reference, undervoltage lockout comparators,
soft−start circuitry, and a fault detector. These peripheral
circuits ensure that the power supply can be turned on and
off in a controlled manner and that the system will be quickly
disabled when a fault condition occurs.
Undervoltage Lockout and Voltage Reference
Separate undervoltage lockout comparators sense the
input VCC voltage and the regulated reference voltage as
illustrated in Figure 19. When VCC increases to the upper
threshold voltage, the VCC UVLO comparator enables the
Reference Regulator. After the Vref output of the Reference
Regulator rises to 4.2 V, the Vref UVLO comparator switches
the UVLO signal to a logic zero state enabling the primary
control path. Reducing VCC to the lower threshold voltage
causes the VCC UVLO comparator to disable the Reference
Regulator. The Vref UVLO comparator then switches the
UVLO output to a logic one state disabling the controller.
The Enable/UVLO Adjust pin allows the power supply
designer to select the VCC UVLO threshold voltages. When
this pin is open, the comparator switches the controller on at
16 V and off at 9.0 V. If this pin is connected to the VCC
terminal, the upper and lower thresholds are reduced to
9.0 V and 8.6 V, respectively. Forcing the Enable/UVLO
Adjust pin low will pull the VCC UVLO comparator input
low (through an internal diode) turning off the controller.
The Reference Regulator provides a precise 5.1 V
reference to internal circuitry and can deliver up to 10 mA
to external loads. The reference is trimmed to better than 2%
initial accuracy and includes active short circuit protection.
Fault Detection
Converter protection from adverse operating conditions
can be implemented with proper use of the Fault Comparator
and Latch blocks that are illustrated in Figure 20. The Fault
Comparator has an input threshold of 1.0 V and when
exceeded, sets the Fault Latch and generates two logic
signals that simultaneously disable the primary control path.
The signal line labeled “Fault” connects directly to two gates
that control the output drivers. This direct path reduces the
driver turn−off propagation delay to approximately 70 ns.
The Fault Latch output is OR’ed with the UVLO output that
is derived from the Vref UVLO comparator, to produce the
logic output labeled “UVLO+Fault”. This signal disables
the Oscillator and the One−Shot by forcing both the COSC
and CT capacitors to be continually charged.
The Fault Latch is automatically reset during startup by a
logic “1” that appears at the Vref UVLO comparator output.
The latch can also be reset after startup by momentarily
pulling the Enable/UVLO Adjust pin low to disable the
Reference. Note that after activation, the Fault Latch will
remain in a set state only as long as VCC is provided to the
MC34067. Also, Drive Output B will assume a high state if
the Fault input signal drops below the 1.0 V threshold level
even after the Fault Latch has been set. In some applications
this characteristic could be problematic but it can be easily
remedied by AC coupling Drive Output B.


Podobny numer części - MC33067DWR2G

ProducentNumer częściArkusz danychSzczegółowy opis
logo
ON Semiconductor
MC33067DW ONSEMI-MC33067DW Datasheet
374Kb / 16P
   HIGH PERFORMANCE ZERO VOLTAGE SWITCH RESONANT MODE CONTROLLERS
Rev 1, 05/99
More results

Podobny opis - MC33067DWR2G

ProducentNumer częściArkusz danychSzczegółowy opis
logo
ON Semiconductor
MC34067 ONSEMI-MC34067_09 Datasheet
634Kb / 16P
   High Performance Resonant Mode Controllers
December, 2009 ??Rev. 13
MC33067 ONSEMI-MC33067_15 Datasheet
540Kb / 16P
   High Performance Resonant Mode Controllers
August, 2015 ??Rev. 15
logo
Motorola, Inc
MC34066 MOTOROLA-MC34066 Datasheet
171Kb / 12P
   High Performance Resonant Mode Controllers
logo
ON Semiconductor
MC34067 ONSEMI-MC34067 Datasheet
374Kb / 16P
   HIGH PERFORMANCE ZERO VOLTAGE SWITCH RESONANT MODE CONTROLLERS
Rev 1, 05/99
logo
Infineon Technologies A...
ICE2HS01G INFINEON-ICE2HS01G Datasheet
606Kb / 29P
   High Performance Resonant Mode Controller
Version 2.0, 11 May 2010
logo
ON Semiconductor
NCP1397ADR2G ONSEMI-NCP1397ADR2G Datasheet
749Kb / 27P
   High Performance Resonant Mode Controller
November, 2011 ??Rev. 4
NCP1395 ONSEMI-NCP1395 Datasheet
335Kb / 27P
   High Performance Resonant Mode Controller
March, 2006 ??Rev. 1
logo
List of Unclassifed Man...
UC1861-1868 ETC1-UC1861-1868 Datasheet
422Kb / 9P
   Resonant-Mode Power Supply Controllers
logo
Texas Instruments
UC1861 TI-UC1861 Datasheet
438Kb / 9P
[Old version datasheet]   Resonant-Mode Power Supply Controllers
UC1861 TI1-UC1861_13 Datasheet
3Mb / 14P
[Old version datasheet]   Resonant-Mode Power Supply Controllers
More results


Html Pages

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


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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