参数资料
| 型号： | IRAC1150-D2 |
| 厂商： | International Rectifier |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | BOARD CONTROL FOR IR1150S |
| 标准包装： | 1 |
| 系列： | µPFC™ |
| 主要目的： | 电源管理，功率因数校正 |
| 已用 IC / 零件： | IR1150S |
| 已供物品： | 板，文档 |
| 相关产品： | IR1150SDKR-ND - IC PFC CONTROLLER CCM 8-SOIC IR1150SPBFDKR-ND - IC PFC CONTROLLER CCM 8-SOIC IR1150SPBFCT-ND - IC PFC CONTROLLER CCM 8-SOIC IR1150SPBFTR-ND - IC PFC CONTROLLER CCM 8-SOIC IR1150SCT-ND - IC PFC CONTROLLER CCM 8-SOIC |
3.2.2 Switching Frequency
The switching frequency of the IRAC1150-D2 Control Board is user programmable.
The default setting is 100kHz and can be changed by removing R9 (schematic, Fig.1)
and replacing it with a value from the chart in Fig. 8, corresponding to the desired
switching frequency. The IR1150 controller has a frequency range of 50 – 200kHz.
Figure 8 - Switching Frequency vs. Programming Resistor Value
3.2.3 Current Sense Resistor
Detailed design of the current sense resistor value can be found in the IR1150S
Application Note AN-1077. Calculated values for a universal input converter with an
85VAC low line for typical output power levels is shown below in Table 1 (see
assumptions below). Typically, the closest standard value would be selected and the
calculations run again in order to optimize the system.
Output Power Level, (Watts) Current Sense Resistor Value, (Ohms)
150
300
500
750
1000
0.227
0.114
0.068
0.045
0.034
Table 1 - Calculated Current Sense Resistor Values for Given Output Power Levels
Note: Assumes a converter overload factor of 10%, ? I L = 20%, converter minimum
efficiency of 92% at low line of 85VAC, and converter output voltage of 385VDC.
Rev. 2.0
7/6/2005
International Rectifier
Page 10 of 12
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