参数资料
| 型号： | ISL6217CVZ-T |
| 厂商： | Intersil |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM INTEL PENT 38-TSSOP |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel Pentium? IMVP-IV，IMVP+ |
| 输入电压： | 5.5 V ~ 25 V |
| 输出数： | 1 |
| 工作温度： | -10°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-TFSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 38-TSSOP |
| 包装： | 带卷 (TR) |
ISL6217
When DSEN# is logic low and DRSEN is logic high the
controller will operate in Deeper Sleep mode. The ISL6217
will then regulate to the voltage at the DRSV pin minus
“Droop”. If the PWRCH pin is connected to the DSEN# pin,
then the controller will also automatically switch to single
channel operation.
If the PWRCH pin is connected to an inverted DPRSLPVR
system signal, then the controller will automatically switch
to single channel operation during Deeper Sleep mode
only. Deep and Deeper Sleep voltage levels are
programmable and explained in the “STV, DSV and DRSV”
section of this document.
STV, DSV and DRSV
Start-up “Boot” Voltage - STV
The start-up or “Boot” voltage is programmed by an
external resistor divider network from the OCSET pin
(Refer to Figure 8). Internally, a 1.75V reference voltage is
output on the OCSET pin. The start-up voltage is set
through a voltage divider from the 1.75V reference at the
OCSET pin. The voltage on the STV pin will be the voltage
the controller will regulate to during the start-up sequence.
Once the PGOOD pin of the ISL6217 controller is
externally enabled high by the Vccp and Vcc_mch
controllers, the ISL6217 will then ramp, after a 10ms delay,
to the voltage commanded by the VID setting minus
“Droop”.
BATTERY
low and the DRSEN pin is low as shown in Figure 6 and
Figure 7. Once in Deep Sleep Mode, the controller will
regulate to the voltage seen on the DSV pin minus “Droop”.
Deeper Sleep Voltage - DRSV
The Deeper Sleep voltage, DRSV, is programmed by an
external voltage divider network from the 1.75V reference
on the OCSET pin (Refer to Figure 8). In Deeper Sleep
mode the ISL6217 controller will regulate the output voltage
to the voltage present on the DRSV pin minus “Droop”.
The IC enters Deeper Sleep mode when DRSEN is high
and DSEN# is low, as shown in Figure 7.
Overcurrent Setting - OCSET
The ISL6217 overcurrent protection essentially compares a
user-selectable overcurrent threshold to the scaled and
sampled output current. An overcurrent condition is defined
when the sampled current is equal to or greater than the
threshold current. A step by step process to design for the
user-desired overcurrent set point is detailed next.
STEP 1: SETTING THE OVERCURRENT THRESHOLD
The overcurrent threshold is represented by the DC current
flowing out of the OCSET pin (See Figure 8). Since the
OCSET pin is held at a constant 1.75V, the user need only
populate a resistor from this pin to ground to set the
desired overcurrent threshold, I OCSET . The user should pick
a value of I OCSET between 10μA and 15μA. Once this is
done, use Ohm’s Law to determine the necessary resistor
to place from OCSET to ground
R OCSET =
= R 1 + R 2 + R 3
V REF = 1.75V
I OCSET
ISL6217
OCSET
1 . 75 V
(EQ. 2)
I OCSET
For example, if the desired overcurrent threshold is 15μA,
R 1
R 2
36.5K
1.200V
30.1K
0.750V
STV
DRSV
VBAT
DACOUT
VID COMMAND
VOLTAGE
1.21K
the total resistance from OCSET must equal 117k Ω .
STEP 2: SELECTING ISEN RESISTANCE FOR DESIRED
OVERCURRENT LEVEL
After choosing the I OCSET level, the user must then decide
what level of total output current is desired for overcurrent.
Typically, this number is between 150% and 200% of the
maximum operating current of the application. For
R 3
49.9K
SOFT
GND
DSV
98.8%
DACOUT
example, if the max operating current is 46A, and the user
chooses 150% overcurrent, the ISL6217 will shut down if
the output current exceeds 46A*1.5 or 69A. According to
98.8K
the Block Diagram, the equation below should be used to
determine R ISEN once the overcurrent level, I OC , is chosen.
I OC ?
? 0 . 2175
FIGURE 8.
0.012 μ F
CONFIGURATIONS FOR BATTERY INPUT,
OVERCURRENT SETTING AND START, DEEP
R ISEN =
r ( DSON )
M
( I OCSET + 2 μ A ) ? N ? 4 μ A
(EQ. 3)
SLEEP AND DEEPER SLEEP VOLTAGE
DIVIDERS
Deep Sleep Voltage - DSV
The Deep Sleep voltage is programmed by an external
voltage divider network from the DACOUT pin (Refer to
Figure 8). The DACOUT pin is the output of the VID digital-
to-analog converter. By having the Deep Sleep voltage
setup from a resistor divider from DAC, the Deep Sleep
voltage will be a constant percentage of the VID. Through
the voltage divider network, Deep Sleep voltage is set to
98.8% of the programmed VID voltage, as per the IMVP-
IV? and IMVP-IV+? specification.
The IC enters the Deep Sleep mode when the DSEN# is
12
In Equation 3, M represents the number of Low-Side
MOSFETs in one channel, and N represents the number of
channels. Using the examples above (I OC = 69A, I OCSET =
15μA) and substituting the values M = 2, N=2, r DS(ON) =
6m Ω , R ISEN is calculated to be 1.5K Ω .
STEP 3: THERMAL COMPENSATION FOR R DS(ON) (IF
DESIRED)
If PTCs are used for thermal compensation, then RISEN is
found using the room temperature value of r DS(ON) . If
standard resistors are used for RISEN, then the “HOT”
value of r DS(ON) should be used for this calculation.
MOSFET r DS(ON) sensing provides advantages in cost,
efficiency, and board area. However, if more precise
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相关代理商/技术参数 |
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| ISL6217EVAL2 | 制造商:Intersil Corporation 功能描述:PURCHASE ISL6216EVAL1, ISL6217EVAL2 OR ISL6218EVAL2 WITH IS - Bulk |
| ISL6218 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Precision Single-Phase Buck PWM Controller for Intel Mobile Voltage Positioning IMVP-IV and IMVP-IV |
| ISL6218CRZ | 功能描述:电流型 PWM 控制器 P6 MULTIPHS BUCK PWM CNTRLR FOR IMVP4 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6218CRZ-T | 功能描述:电流型 PWM 控制器 P6 MULTIPHS BUCK PWM CNTRLR FOR IMVP4 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6218CV | 功能描述:IC CTRLR INTEL PENT M 38-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
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