参数资料
型号: ISL6266AHRZ
厂商: Intersil
文件页数: 29/30页
文件大小: 0K
描述: IC CORE CTRLR 2PHASE 48-QFN
标准包装: 43
应用: 转换器,Intel IMVP-6
输入电压: 5 V ~ 25 V
输出数: 1
输出电压: 0.3 V ~ 1.5 V
工作温度: -10°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN(7x7)
包装: 管件
ISL6266, ISL6266A
10μA
OCSET
+Voc -Roc
= --------
OC
-
+
+
VSUM
VSUM
RS
EQV
RS
2
INTERNAL TO
ISL6266A
DROOP
-
DFB
+
Vrsense EQV = I OUT × -----------------------
+
+
+
1 -
+
1
-
DROOP
Cn
+
-
VN
Rsense
2
-
= ---------
VDIFF
RTN VSEN
VO'
VO'
RO
EQV
RO
2
FIGURE 42. EQUIVALENT MODEL FOR DROOP AND DIE SENSING USING DISCRETE RESISTOR SENSING
R OC = ----------------------------------- = ------------------------------ = 11.5k Ω
10 μ A
10 ? 10
I OC = --------------------------------------
2.5 ? R DROOP
V OC . Once the droop voltage is greater than V OC , the PWM
drives will turn off and PGOOD will go low.
The selection of R OC is given in Equation 37. Assuming an
overcurrent trip level, I OC , of 55A, and knowing from the Intel
specification of the load line slope, R droop = 0.0021 (V/A),
R OC is calculated by Equation 37.
I OC ? R droop 55 ? 0.0021
(EQ. 37)
– 6
Note, if the droop load line slope is not -0.0021 (V/A) in the
application, the overcurrent setpoint will differ from
predicted. In addition, due to the saturation limitations of the
DROOP amplifier, there is a maximum way-overcurrent
(WOC) set point for each VID code. The maximum OC set
point that will ensure WOC can be reached is expressed in
Equation 38:
1.75 – VID
(EQ. 38)
The WOC limitation is only problematic at very high VID
settings (~1.350V and above).
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
29
FN6398.3
June 14, 2010
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