参数资料
型号: IP1201PBF
厂商: International Rectifier
文件页数: 9/29页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 30A 198BGA
产品变化通告: (EP) Parts Discontinuation 25/May/2012
标准包装: 10
系列: iPOWIR™
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 3.3 V
输入电压: 3.14 V ~ 5.5 V
PWM 型: 电流模式
频率 - 开关: 200kHz ~ 400kHz
电流 - 输出: 30A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 198-BGA(159 凸块)
包装: 散装
供应商设备封装: BGA(15.5x9.25)
配用: IRDCIP1201-A-ND - BUCK CONV REF DESIGN KIT IP1201
iP1201PbF
Output2 (Fig. 2)
(Fig. 4)
(Fig. 5)
(Fig. 6)
(Fig. 7)
Maximum power loss = 8.25W /2 = 4.13W
Normalized power loss for input voltage ≈ 0.97
Normalized power loss for output voltage ≈ 0.98
Normalized power loss for frequency ≈ 0.918
Normalized power loss for inductor value ≈ 1.0
Adjusted Power Loss = 4.13W x 0.97 x 0.98 x 0.918 x 1.0 ≈ 3.60W
Total device power loss = 2.36W + 3.60W = 5.96W
Example 2) Adjusting for SOA Temperature:
Assuming T CASE = 110°C & T PCB = 90°C for both outputs
Output1 (Fig. 4) Normalized SOA Temperature for input voltage ≈ -1.0°C
(Fig. 5) Normalized SOA Temperature for output voltage ≈ 0°C
(Fig. 6) Normalized SOA Temperature for frequency ≈ -2.9°C
(Fig. 7) Normalized SOA Temperature for inductor value ≈ 0°C
T X axis intercept temp adjustment = -1.0°C + 0°C -2.9°C + 0°C ≈ -3.9°C
The following example shows how the SOA current is adjusted for a T X change of -3.9°C and output 1 is in SOA
Case Temperature ( oC)
16
0
10
20
30
40
50
60
70
80
90
100
110
120
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Adjusted SOA Current
Safe
Operating
Area
V IN = 5V
V OUT1 = V OUT2 = 1.5V
I OUT = 15A
f SW = 300kHz
L = 1.8uH
Unadjusted SOA Current
T X
0
10
20
30
40
50
60
70
80
90
100
110
120
PCB Temperature (oC)
Output2 (Fig. 4)
(Fig. 5)
(Fig. 6)
(Fig. 7)
Normalized SOA Temperature for input voltage ≈ -1.0°C
Normalized SOA Temperature for output voltage ≈ -0.55°C
Normalized SOA Temperature for frequency ≈ -2.9°C
Normalized SOA Temperature for inductor value ≈ 0°C
T X axis intercept temp adjustment = -1.0°C - 0.55°C - 2.9°C + 0°C ≈ -4.45°C
The following example shows how the SOA current is adjusted for a T X change of -4.45°C and output 2 is in SOA.
Case Temperature ( oC)
16
0
10
20
30
40
50
60
70
80
90
100
110
120
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Adjusted SOA
Safe
Operating
Area
V IN = 5V
V OUT1 = V OUT2 = 1.5V
I OUT = 15A
f SW = 300kHz
L = 1.8uH
Unadjusted SOA
T X
0
10
20
30
40
50
60
70
80
90
100
110
120
www.irf.com
PCB Temperature (oC)
9
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