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PFS7329H 参数 Datasheet PDF下载

PFS7329H图片预览
型号: PFS7329H
PDF下载: 下载PDF文件 查看货源
内容描述: 高功率PFC控制器,集成高压MOSFET和二极管Qspeed的 [High Power PFC Controller with Integrated High-Voltage MOSFET and Qspeed Diode]
分类和应用: 二极管功率因数校正高压控制器
文件页数/大小: 30 页 / 4360 K
品牌: POWERINT [ Power Integrations ]
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PFS7323-7329  
Normal Range for  
‘Efficiency Mode’  
R = 49.9 kΩ  
Normal Range for  
‘Full Mode’  
R = 24.9 kΩ  
IV < ~48 µA  
IV > ~59 µA  
IC-OFF  
IC-OFF  
IC-OFF  
25 μA  
50 μA  
30 μA  
20 μA  
40 μA  
60 μA  
VIN  
PI-6701-030212  
~140 VAC  
~170 VAC  
PI-6863-050313  
Figure 12. REFERENCE Pin Current Operating Range.  
Figure 13. Line Dependent OCP.  
D. Once the start-up sequence check has passed and the  
converter goes into soft-start and if PGT is shorted to  
SIGNAL GROUND pin, then the PG signal will toggle to the  
low state (internal MOSFET is ‘on’) when the output voltage  
reaches 85-100% of the set regulation threshold and will  
remain in this state until the output voltage reaches zero volt  
or conditions in A, B or C occur.  
Brown-In Protection (IUV+  
)
The VOLTAGE MONITOR pin features an input line undervoltage  
detection to limit the minimum start-up voltage detected  
through the VOLTAGE MONITOR pin. This detection threshold  
will inhibit the device from starting at very low input AC voltage.  
E. Once the start-up sequence check has passed and the  
converter goes into soft-start and if PGT is open, then the  
PG signal will remain in the high-impedance state (internal  
MOSFET is ‘off’).  
Brown-Out Protection (IUV-  
)
The VOLTAGE MONITOR pin features a brown-out protection  
mode wherein the HiperPFS will turn-off when the VOLTAGE  
MONITOR pin current is below the Line UV- threshold (IUV-) for a  
period exceeding the tBROWN-OUT time period. In the event a  
single half-line cycle is missing (normal operating line frequency  
is 47 to 63 Hz) the brown-out protection will not be activated.  
The HiperPFS-2 soft-shutdown in effect gradually reduces the  
internal error-voltage to zero volts at rate of 1 V/ms to decay the  
power MOSFET on-time to zero.  
Reference and Selectable Power Limit  
Besides the internal current reference source, the precision  
resistor on the REFERENCE pin also allows user selection  
between ‘full’ and ‘efficiency’ power limit for each device. The  
efficiency power mode will permit user selection of a larger  
device for a given output power requirement for increased  
conversion efficiency.  
At peak power (VE ~5 V) the shutdown time will be approximately  
5 ms. The internal error-voltage is held at 0 V for as long as the  
input peak voltage is below the brown-in (IUV+) threshold. The  
internal error-voltage controlled slew to 0 V gradually reduces  
the switch on-time to zero to deplete energy stored in the boost  
choke as well as input EMI filter for power-down. Once the  
error-voltage reaches zero volts the controller is effectively in an  
off-state (gated by 5 ms timer) and will restart once all the  
conditions of soft-start are satisfied.  
In ‘full’ power mode the REFERENCE pin resistor is 24.9 kW  
±1% and the ‘Efficiency’ power limit mode is selected with a  
49.9 kW ±1% resistor.  
If the REFERENCE pin is shorted (to GROUND pin) or open  
circuited the IC will initiate a fast soft-shutdown and disable the  
power MOSFET and remain disabled until all the conditions for  
the start-up sequence are satisfied.  
At start-up and during soft-start the brown-out threshold (same  
as Line UV-) is reduced to IUV(SS) and brown-out timer is also  
extended to tUV(SS) (soft-start brown-out timer).  
The REFERENCE pin resistor value and power mode is latched  
at start-up.  
Protection Modes  
Soft-start brown-out threshold (IUV(SS)) is reset to IUV- once the  
internal error-voltage has begun to fall (indicating the converter  
has reached steady-state output voltage regulation).  
VOLTAGE MONITOR (V) Pin Shutdown  
The VOLTAGE MONITOR pin features a shutdown protection  
mode which can be used with the VOLTAGE MONITOR pin  
resistor or external circuitry to cover system faults. During  
start-up (1 V < VFB < 5.8 V) in the event the current through the  
VOLTAGE MONITOR pin exceeds the IV(OFF) threshold for a  
duration exceeding approximately (1 ms), the IC disables the  
internal MOSFET for the entire duration that the VOLTAGE  
MONITOR pin current is above IV(OFF). In normal operation, if the  
current through the VOLTAGE MONITOR pin exceeds the IV(OFF)  
threshold for a duration exceeding tV(OFF), the IC will re-initiate the  
start-up sequence.  
The soft-start brown-out timer is reset to the normal brown-out  
timer once the internal error-voltage has begun to fall (indicating  
the converter has reached steady-state output voltage regulation)  
and the VOLTAGE MONITOR pin current exceeds IUV-  
.
If the VOLTAGE MONITOR pin current is still below the IUV(SS)  
threshold after the end of the soft-start brown-out timer (tUV(SS)),  
then the converter will fail to start and initiate a soft-shutdown  
followed by a soft start-up sequence as described in flowchart  
in Figure 8.  
9
www.powerint.com  
Rev. B 06/13