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參數資料
| 型號： | IRDCIP2002-C |
| 廠商： | International Rectifier |
| 英文描述： | 1MHz, 120A, 4-phase Synchronous Buck Converter using iP2002 |
| 中文描述： | 1MHz的，120A條，4相同步降壓轉換器使用iP2002 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 1681K |
| 代理商： | IRDCIP2002-C |
07/22/03
IRDCiP2002-C: 1MHz, 120A, 4-phase Synchronous Buck
Converter using iP2002
Overview
This reference design is capable of delivering up to 120A at an
ambient temperature of 45°C if the enclosed heatsink is attached
and 250LFM of airflow is provided. Performance graphs and
waveforms are provided in figures 1 - 9. The figures and table in
pages 4 - 7 are provided as a reference design to enable engineers
to very quickly and easily design a 4-phase converter. Refer to the
data sheet for the controller listed in the bill of materials in order to
optimize this design to your specific requirements. A variety of other
controllers may also be used, but the design will require layout and
control circuit modifications.
IRDCiP2002-C
International Rectifier
233 Kansas Street, El Segundo, CA 90245 USA
R
EFERENCE
ESIGN
iP2002 Recommended Operating Conditions
(refer to the iP2002 datasheet for maximum operating conditions)
Input voltage:
6.5 - 12V
Output voltage:
0.8 - 3.3V
Switching Freq:
1MHz per phase, 4MHz effective output frequency.
Output current:
The reference design is capable of delivering up to 120A at an ambient temperature of 45°C if the
enclosed heatsink is attached and 250LFM of airflow is provided. With a heatsink and no airflow, the
reference board is capable of delivering 110A at 25°C ambient. With 250LFM and no heatsink, the
reference board is capable of delivering 100A at 25°C ambient.
Demoboard Quick Start Guide
Initial Settings:
The output is set to 1.3V, but can be adjusted from 0.8V to 3.3V by changing the values of R3 and R32 according to
the following formula:
R3 = R32 = (24.91k * 0.8) / (V
OUT
- 0.8)
The switching frequency per phase is set to 1MHz with the frequency set resistor R4. This creates an effective output
frequency of 4MHz. The graph in figure 11 shows the relationship between R4 and the switching frequency per phase.
The frequency may be adjusted by changing R4 as indicated; however, extreme changes from the 1MHz set point may
require redesigning the control loop and adjusting the values of input and output capacitors. Refer to the SOA graph in
the iP2002 datasheet for maximum operating current at different conditions.
Procedure for Connecting and Powering Up Demoboard:
1. Apply input voltage (+12V) across VIN and PGND
2. Apply load across VOUT pads and PGND pads
3. Adjust load to desired level. See recommendations below.
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