参数资料
型号: IRDC3871
厂商: International Rectifier
文件页数: 7/21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:
已用 IC / 零件: IR3871
IR3871MPBF
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, Vout = 1.05V, Fs = 300kHz, TA = 25 o C, no airflow,
unless otherwise specified
95%
100%
85%
75%
EFF @ 8V IN
90%
80%
65%
55%
45%
35%
EFF @ 19V IN
EFF @ 12V IN
70%
60%
50%
40%
EFF @ 3.3V OUT , L = 3.3μ H
EFF @ 1.5V OUT , L = 2.2μ H
EFF @ 1.05V OUT, L = 1.5μ H
0.01
0.1
1
10
0.01
0.1
1
10
Output Current (A)
Figure 1. Efficiency vs. Output Current for
V OUT = 1.05V
Output Current (A)
Figure 2. Efficiency vs. Output Current for
VIN = 12V
350
300
250
1200
1000
800
5.0 Vout
4.0
3.0
2.0
1.0
4.5
3.5
2.5
1.5
0.5
200
150
100
50
0
600
400
200
0
0
1
2
3
4
5
6
7
8
200
400
600
800
1000
Output Current (A)
Figure 3. Switching Frequency vs. Output
Current
1.052
1.052
Frequency (kHz)
Figure 4. Frequency vs. R FF
1.051
1.050
1.049
1.048
V OUT @ 19V IN
V OUT @ 12V IN
V OUT @ 8V IN
1.051
1.050
1.049
1.048
0
1
2
3
4
5
6
7
8
6
8
10
12
14
16
18
20
Output Current (A)
Figure 5. Output Voltage Regulation vs.
Output Current
Input Voltage (V)
Figure 6. Output Voltage Regulation vs.
Input Voltage at I OUT = 8A
7
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