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参数资料
| 型号： | ISL6115 |
| 厂商： | Intersil Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Power Distribution Controllers |
| 中文描述： | 配电控制器 |
| 文件页数： | 6/12页 |
| 文件大小： | 363K |
| 代理商： | ISL6115 |
6
and as short as possible with zero current in the sense lines.
(See Figure 1.)
Using the ISL6116 as a -48V Low Side Hot
Swap Power Controller
To supply the required V
DD
, it is necessary to maintain the
chip supply 10 to 16V above the -48V bus. This may be
accomplished with a suitable regulator between the voltage
rail and pin 5 (VDD). By using a regulator, the designer may
ignore the bus voltage variations. However, a low-cost
alternative is to use a Zener diode (See Figure 2 for typical
5A load control); this option is detailed below.
Note that in this configuration the PGOOD feature (pin 7) is
not operational as the I
SEN
pin voltage is always < UV
threshold.
See Figures 17 to 20 for waveforms relevant to -48V and
other high voltage applications.
Biasing the ISL6116
Table 3 gives typical component values for biasing the
ISL6116 in a
±
48V application. The formulas and
calculations deriving these values are also shown below.
When using the ISL6116 to control -48V, a Zener diode may
be used to provide the +12V bias to the chip. If a Zener is
used then a current limit resistor should also be used.
Several items must be taken into account when choosing
values for the current limit resistor (R
CL
) and Zener Diode
(DD1):
The variation of the V
BUS
(in this case, -48V nominal)
The chip supply current needs for all functional conditions
The power rating of R
CL
.
The current rating of DD1
Formulas
1. Sizing R
CL
:
R
CL
= (V
BUS,MIN
- 12)/I
CHIP
2. Power Rating of R
CL
:
P
RCL
= I
C
(V
BUS,MAX
- 12)
3. DD1 Current Rating:
I
DD1
= (V
BUS,MAX
- 12)/R
CL
Example
A typical -48V supply may vary from -36 to -72V. Therefore,
V
BUS,MAX
= -72V
V
BUS,MIN
= -36V
I
CHIP
= 15mA (max)
Sizing R
CL
:
R
CL
= (V
BUS,MIN
- 12)/I
C
R
CL
= (36 - 12)/0.015
R
CL
= 1.6k
[Typical Value = 1.58k
]
Power Rating of R
CL
:
P
RCL
= I
C
(V
BUS,MAX
- 12)
P
RCL
= (0.015)(72 - 12)
P
RCL
= 0.9W [Typical Value = 1W]
DD1 Current Rating:
I
DD1
= (
VBUS,MAX
- 12)/R
CL
I
DD1
= (72 - 12)/1.58k
I
DD1
= 38mA [Typical Value = 12V rating, 50mA reverse
current]
CORRECT
TO ISEN AND
CURRENT
SENSE RESISTOR
INCORRECT
FIGURE 1. SENSE RESISTOR PCB LAYOUT
R
ISET
V
BUS
LOAD
1
2
3
4
8
7
6
5
ISL6116
PWRON
NC
FIGURE 2.
-48V
R
CL
DD1
12V
1.58k
1W
0.01μF
0.047μF
1.47k
0.005
1%
0.001μF
2k
1%
TABLE 3. TYPICAL VALUES FOR A -48V HOT SWAP
APPLICATION
SYMBOL
PARAMETER
R
CL
1.58k
, 1W
DD1
12V Zener Diode, 50mA Reverse Current
ISL6115, ISL6116, ISL6117, ISL6120
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| ISL6116 | Power Distribution Controllers |
| ISL6120 | Octal Transparent D-Type Latches With 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6120CB | Octal Transparent D-Type Latches With 3-State Outputs 20-TSSOP -40 to 85 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6115 WAF | 制造商:Intersil Corporation 功能描述: |
| ISL6115_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Distribution Controllers |
| ISL6115A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:12V Power Distribution Controllers |
| ISL6115ACBZ | 功能描述:热插拔功率分布 W/ANNEAL 8LD +12V HOT PLUG CNTRLR RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| ISL6115ACBZ-T | 功能描述:热插拔功率分布 W/ANNEAL 8LD +12V HOT PLUG CNTRLR RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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