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参数资料
| 型号： | IRDC3871 |
| 厂商： | International Rectifier |
| 文件页数： | 17/21页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR IRDC3871 |
| 标准包装： | 1 |
| 系列： | SupIRBuck™ |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.05V |
| 电流 - 输出： | 8A |
| 输入电压： | 12V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | IR3871 |
IR3871MPBF
LAYOUT RECOMMENDATION
Bypass Capacitor:
One 1μF high quality ceramic capacitor should be
placed as near VCC pin as possible. The other
end of capacitor can be connected to a via or
V IN
connected directly to GND plane. Use a GND
plane instead of a thin trace to the GND pin
because a thin trace have too much impedance.
Q1
ON
V OUT
Boot Circuit:
C BOOT should be placed near the BOOT and
PHASE pins to reduce the impedance when the
IR3871
Q2
OFF
C OUT
C IN
upper MOSFET turns on.
Power Stage:
Figure 24 shows the current paths and their
directions for the on and off periods. The on time
path has low average DC current and high AC
current. Therefore, it is recommended to place the
Figure 24. Current Path of Power Stage
input
ceramic
capacitor,
upper,
and
lower
MOSFET in a tight loop as shown in Figure 24.
The purpose of the tight loop from the input
ceramic
capacitor
is
to suppress
the
high
frequency (10MHz range) switching noise and
reduce Electromagnetic Interference (EMI). If this
path has high inductance, the circuit will cause
voltage spikes and ringing, and increase the
switching loss. The off time path has low AC and
high average DC current. Therefore, it should be
laid out with a tight loop and wide trace at both
ends of the inductor. Lowering the loop resistance
reduces the power loss. The typical resistance
value of 1-ounce copper thickness is 0.5 mΩ per
square inch.
17
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相关代理商/技术参数 |
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| IRDC3876 | 制造商:International Rectifier 功能描述:9999V 999.000A POL IC - Rail/Tube 制造商:International Rectifier 功能描述:BOARD EVAL FOR IR3876 |
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| IRDC3897 | 功能描述:电源管理IC开发工具 Design Kit POL IC RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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