参数资料
型号: IP1206TRPBF
厂商: International Rectifier
文件页数: 24/30页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 30A/15A LGA
产品变化通告: (EP) Parts Discontinuation 25/May/2012
标准包装: 750
系列: iPOWIR™
类型: 降压(降压)
输出类型: 可调式
输出数: 1 或 2
输出电压: 0.8 V ~ 5.5 V
输入电压: 7.5 V ~ 14.5 V
PWM 型: 电压模式
频率 - 开关: 200kHz ~ 600kHz
电流 - 输出: 30A,15A
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: 36-BFLGA
包装: 带卷 (TR)
供应商设备封装: 36-LGA(9.25x15.5)

i P1206PbF
Programming the Current-Limit
The Current-Limit threshold can be set by
connecting a resistor (R OCSET ) from drain of low
side MOSFET to the OCSet pin. The resistor
value can be obtained by using Fig. 24.
It is important to pay careful attention to the
layout of this resistor. It is recommended to
place this resistor close to the IC and away from
possible noisy traces. A small ceramic capacitor
from this pin to ground can also be place for
noise rejection purposes.
The trip current Itrip is given by:
I trip = I max + I L , Peak - - - - ( 7 )
where
I max = Maximum DC load current * 1.5
I L , Peak = Peak Inductor Current
For a maximum DC load current of 8.5A
and an inductor ripple of 3A
I L , Peak = 1 . 5 A
? I trip = 8.5 * 1.5 + 1.5A = 14.25A
From Fig. 24 we get R OCSET = 5 . 23 K Ω
( V in o ) ?
? V
Note : I L , Peak =
Δ i
2
=
V o
V in ? L * F s
2
13
12
11
10
9
8
7
6
5
4
3
2
1
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Peak Inductor Current (A)
Fig. 24: R OCSET selection from Peak Inductor Current
www.irf.com
2/26/2008
24
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