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参数资料
| 型号： | ISL6116CBZA-T |
| 厂商： | Intersil |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR POWER DISTRIB 8-SOIC |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 9 V ~ 15 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
ISL6115, ISL6116, ISL6117, ISL6120
LOAD
0.005
1%
Formulas
Sizing R CL is expressed in Equation 1:
R CL = -------------------------------------------
0.001μF
2k Ω
1.47k Ω
1%
V BUS ( MIN ) – 12
I CHIP
(EQ. 1)
P RCL = I C ( V BUS ( MAX ) – 12 )
R CL
1.58k Ω
1W
0.01μF
ISL6116
Power Rating of R CL is expressed in Equation 2:
(EQ. 2)
DD1 current rating is expressed in Equation 3:
( V BUS ( MAX ) – 12 )
I DD1 = --------------------------------------------------
DD1
12V
0.047μF
NC
PWRON
(EQ. 3)
R CL
Example:
A typical -48V supply may vary from -36 to -72V.
Therefore:
V BUS -48V
FIGURE 2. TYPICAL 5A LOAD CONTROL
V BUS,MAX = -72V
V BUS,MIN = -36V
R CL = ------------------------------------------------
R CL = -------------------
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 in the
following equations.
TABLE 3. TYPICAL VALUES FOR A -48V HOT SWAP
APPLICATION
I CHIP = 15mA (Max)
Sizing R CL is expressed in Equation 4:
( V BUS ( MIN ) – 12 )
I C
36 – 12
0.015
R CL = 16k Ω [ TypicalValue = 1.58k Ω ]
(EQ. 4)
SYMBOL
R CL
1.58k Ω , 1W
PARAMETER
Power rating of R CL is expressed in Equation 5:
DD1
12V Zener Diode, 50mA Reverse Current
P RCL = I C ( V BUS ( MAX ) – 12 )
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
P RCL = ( 0.015 ) ( 72 – 12 )
P RCL = 0.9W [ TypicalValue = 1W ]
(EQ. 5)
I DD1 = --------------------------------------------------
R CL
I DD1 = ------------------------
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
7
DD1 current rating is expressed in Equation 6:
( V BUS ( MAX ) – 12 )
(EQ. 6)
( 72 – 12 )
1.58k Ω
I DD1 = 38mA [ TypicalValue = 12Vrating, 50mA reverse current ]
FN9100.7
April 29, 2010
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