参数资料
| 型号： | RDK-236 |
| 厂商： | Power Integrations |
| 文件页数： | 7/30页 |
| 文件大小： | 0K |
| 描述： | KIT REF DESIGN PFS714EG |
| 标准包装： | 1 |
| 系列： | HiperPFS™ |
| 主要目的： | 电源管理，功率因数校正 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | PFS714EG |
| 主要属性： | 347W，370 ~ 390V 输出，90 ~ 264VAC 输入 |
| 已供物品： | 板 |
| 其它名称： | 596-1418 |
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PFS704-729EG
120
110
100
230 VAC
180 VAC
135 VAC
115 VAC
90 VAC
120
110
100
V IN = 115 VAC
100% Peak Load
Expected Frequency
Range at Peak
Rated Load
90
80
90
80
70
60
50
40
30
70
60
50
40
30
75% Peak Load
50% Peak Load
25% Peak Load
20
10
Peak Load
20
10
0
45
90
135
180
0
45
90
135
180
Line Conduction Angle (°C)
Line Conduction Angle (°C)
Figure 8.
(a) Frequency Variation Over Line Half-Cycle as a Function of Input Voltage (b) Frequency Variation Over Line Half-Cycle as a Function of Load.
~5 V
~5 V
~2.5 V
~1.25 V
PFS704-716
V IN > 170 VAC
PFS704-716
V IN < 140 VAC
~2.5 V
PFS704-716
~0.8 V
PFS723-729
~4.8 V
V E
~5 V
(full power)
~140 VAC
~170 VAC
V IN
PI-5338-021711
Figure 9.
V OFF vs. V E and V OFF vs. Input Voltage.
controlled with respect to the internal error-voltage level (output
power) to allow the converter to maintain output voltage
regulation and relatively flat conversion efficiency between 10%
to 100% of rated load which is essential to meet many efficiency
directives.
The degree of frequency slide is also controlled as a function of
peak input line voltage, at high input line the maximum off-time
voltage reference at zero error-voltage will be approximately 1/2
of the maximum value at low input line conditions.
The lower V OFF slope reduces the average frequency swing for
high input line operation.
Protection Modes
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 < V FB < 5.8 V) in the event the current through the
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VOLTAGE MONITOR pin exceeds the I V(OFF) threshold for a
duration exceeding approximately (1 m s), the IC disables the
internal MOSFET for the entire duration that the V pin current is
above I V(OFF) . In normal operation, if the current through the V
pin exceeds the I V(OFF) threshold for a duration exceeding t V(OFF) ,
the IC will re-initiate the start-up sequence.
Brown-In Protection (I UV+ )
The VOLTAGE MONITOR pin features an input line undervoltage
detection to limit the minimum start-up voltage detected
through the V pin. This detection threshold will inhibit the
device from starting at very low input AC voltage.
Brown-Out Protection (I UV- )
The V pin features a brown-out protection mode wherein the
HiperPFS will turn-off when the V pin current is below the Line
UV-threshold for a period exceeding the t REFRESH 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 shutdown in effect gradually
reduces the internal error-voltage to zero volts at rate of 1 V/ms
7
Rev. F 12/12
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