|
|
PDF NCP1927 Data sheet ( Hoja de datos )
| Número de pieza | NCP1927 | |
| Descripción | Combination Power Factor Correction Controller and Flyback Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NCP1927 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
|
No Preview Available !
NCP1927
Combination Power Factor
Correction Controller and
Flyback Controller for Flat
Panel TVs
This combination IC integrates the primary side control blocks −
power factor correction (PFC) and flyback controllers with
sequencing circuitry − necessary to implement a compact highly
efficient Flat Panel TV Switched Mode Power Supply.
The PFC controller exhibits near−unity power factor while
operating in Critical Conduction Mode (CrM) with an internal
frequency clamp. The circuit incorporates all the features necessary
for building a robust and compact PFC stage while minimizing the
number of external components.
The fixed−frequency current−mode flyback controller features a
proprietary Soft−Skip™ mode combined with frequency foldback
enabling excellent efficiency during light load conditions while
achieving very low standby power consumption. Soft−Skip
dramatically reduces the risk of acoustic noise, therefore enabling the
use of inexpensive transformers and capacitors in the clamping
network. Frequency jittering and ramp compensation make this
controller an excellent fit for converters where ruggedness and
component cost are the key constraints.
http://onsemi.com
MARKING DIAGRAM
POVUV
PFB
Shutdown
PControl
PCT
PZCD
SOIC−16
CASE 751B
PCS
GTS
IENABLE
PSKIP
PDRV
VCC
FDRV
GND
FFB
FCS
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
Common General Features
• Wide VCC Range from 10 V to 30 V
• Very Low Startup Current Consumption
(v 20 mA MAX)
• Inverter Enable Output
• Shutdown Pin to Disable IC
• Go To Standby Input
• This is a Pb−Free Device
ORDERING INFORMATION
Device
Package
Shipping†
NCP1927DR2G
SOIC−16 2500 / Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
PFC Controller Features
• Critical Conduction Mode (CrM) with Constant On
Time Control
• Internal Frequency Clamp
• Skip Mode Operation During Light Load Conditions
• Fast Line / Load Transient Compensation
• Accurate and Programmable Maximum On Time
Control
• Negative Current Sensing
• Programmable Overvoltage/Undervoltage Protection
• 800 mA Source / 1200 mA Sink Gate Drive
Flyback Controller Features
• 65 kHz Fixed−Frequency Operation with Built−In
Ramp Compensation
• Frequency Jittering for Softened EMI Signature
• Frequency Foldback then Soft−Skip for Improved
Performance in Standby
• Timer−Based Overload Protection with Auto−Recovery
• Protection Against Winding Short−Circuit
• 4 ms Soft−Start Timer
• 800 mA Source / 1200 mA Sink Gate Drive
© Semiconductor Components Industries, LLC, 2011
June, 2011 − Rev. 0
1
Publication Order Number:
NCP1927/D
Free Datasheet http://www.datasheet4u.com/
1 page  
NCP1927
MAXIMUM RATINGS (Note 1)
Rating
Symbol
Value
Unit
Supply Pin (pin 13) (Note 2)
Voltage Range
Current Range
PFC Drive Pin (pin 14) (Note 2)
Voltage Range
Current Range
Flyback Drive Pin (pin 12) (Note 2)
Voltage Range
Current Range
Inverter Enable Pin (pin 16) (Note 2)
Voltage Range
Current Range
Control Pin (pin 4) (Note 2)
Voltage Range
Current Range
PFC Current Sense Pin (pin 7) (Note 2)
Voltage Range
Current Range
ZCD Pin (pin 6) (Note 2)
Voltage Range
Current Range
All Other Pins (Note 2)
Voltage Range
Current Range
Thermal Resistance
Junction−to−Air, 100 mm2 Single Layer of 1 oz Copper
VCC(MAX)
ICC(MAX)
VPDRV(MAX)
IPDRV(MAX)
VFDRV(MAX)
IFDRV(MAX)
VIENABLE(MAX)
IIENABLE(MAX)
VPControl(MAX)
IPControl(MAX)
VPCS(MAX)
IPCS(MAX)
VPZCD(MAX)
IPZCD(MAX)
VMAX
IMAX
RθJA
−0.3 to 30
$30
−0.3 to 20
−800, +1200
−0.3 to 20
−800, +1200
−0.3 to 6
$20
−0.3 to 6
$10
−0.3 to 3
$10
−0.9 to 12
$10
−0.3 to 10
$10
140
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
°C/W
Temperature Range
Storage Temperature
Operating Junction Temperature
TJSTRG(MAX)
TJ(MAX)
−60 to 150
−25 to 125
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Charged Device Model 2000 V per JEDEC Standard JESD22-C101D
Human Body Model 2000 V per JEDEC Standard JESD22−A114E
Machine Model 200 V per JEDEC Standard JESD22−A115A
2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.
http://onsemi.com
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
NCP1927
Vin
Rstart
D1 D2
+ C1 + C2
Aux Winding
ICC
VCC
NCP1927
Figure 3. Operation with Dual VCC Capacitors
VCC
VCC(on)
VCC(off)
VCC(reset)
0V
DRV
PDRVPDRV
Time
FDRVFDIRCVC
ICC1+ICC(FDRV)+ICC(PDRV)
ICC3+ICC(FDRV)
ICC5
Time
Time
Figure 4. Startup Sequence of the NCP1927
VCC
VCCON
VCCOFF
Fault
Occurs
DRV
Device
Restarts
Fault is Reset
time
ICC
ICC2
ICC4
ICC5
Figure 5. VCC During a VCC Hiccup
time
time
SHUTDOWN PIN
The Shutdown pin allows for external disabling of the
NCP1927. When VShutdown is pulled above the shutdown
threshold, VSHDN (typically 1.0 V), both the flyback and
PFC drive outputs are immediately turned off, and a VCC
hiccup occurs (see Figure 5). When VCC reaches VCC(on),
the cycle repeats unless the NCP1927 is taken out of
shutdown. This is achieved when VShutdown becomes less
than VSHDN. The NCP1927 leaves shutdown mode and will
start when VCC reaches VCC(on) according to the initial
power−on sequence. The VCC behavior during shutdown
mode is shown in Figure 6.
FAULT MANAGEMENT
When the NCP1927 detects a non−latching fault
(Shutdown Mode, TSD, and Flyback Overload), the drivers
are disabled, and VCC falls towards VCC(off) due to the IC
internal current consumption. Once VCC falls below
VCC(off), the fault is reset and the IC internal current
consumption is reduced to the startup current, ICC5. VCC
begins to rise as if power was initially applied and the device
resumes normal operation once VCC reaches VCC(on). This
cycle between VCC(on) and VCC(off) is commonly referred to
as a VCC hiccup and is shown in Figure 5.
http://onsemi.com
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet NCP1927.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NCP1927 | Combination Power Factor Correction Controller and Flyback Controller | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |