参数资料
| 型号： | ISL6266HRZ |
| 厂商： | Intersil |
| 文件页数： | 25/30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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页
ISL6266, ISL6266A
Λ
where R NTC ( T ) is the normalized NTC resistance to its
nominal value. Most data sheets of the NTC thermistor give
The closest standard resistor to this result is 4.42k Ω. The NTC
resistance at T 2 is given by Equation 18.
the normalized resistor value based on its value at +25°C.
R NTC_T2 = 2.96k Ω + R NTC_T1 = 18.16k Ω
(EQ. 18)
Once the NTC thermistor resistor is determined, the series
resistor can be derived by Equation 14:
Therefore, the NTC branch is designed to have a 470k Ω
NTC and 4.42k Ω resistor in series. The part number of the
R S = --------------- – R NTC ( T1 ) = 20k Ω – R NTC_T
1.2V
60 μ A
1
(EQ. 14)
NTC thermistor is ERTJ0EV474J in an 0402 package. The
NTC thermistor should be placed in the spot that provides
Once R NTCTo and R s is designed, the actual NTC resistance
at T 2 and the actual T 2 temperature can be found in
Equations 15 and 16:
the best indication of the voltage regulator circuit
temperature.
R NTC_T
2
= 2.96k Ω + R NTC_T
1
(EQ. 15)
Static Mode of Operation - Static Droop Using DCR
Sensing
T 2_actual = ----------------------------------------------------------------------------------- – 273
? R NTC_T ?
--- ln ? ------------------------- 2 ? + 1 ? ( 273 + To )
? R NTCTo ?
1
b
1
(EQ. 16)
As previously mentioned, the ISL6266A has a differential
amplifier that provides precision voltage monitoring at the
processor die for both single-phase and two-phase
operation. This enables the ISL6266A to achieve an
For example, if using Equations 12, 13 and 14 to design a
thermal throttling circuit with the temperature hysteresis
+100°C to +105°C, since T 1 = +105°C and T 2 = +100°C,
and if we use a Panasonic NTC with b = 4700, Equation 12
gives the required NTC nominal resistance as
R NTC_To = 459k Ω .
In fact, the data sheet gives the resistor ratio value at
+100°C to +105°C, which is 0.03956 and 0.03322
respectively. The b value 4700k Ω in the Panasonic data
sheet only covers to +85°C. Therefore, using Equation 13 is
more accurate for +100°C design, the required NTC nominal
resistance at +25°C is 467k Ω . The closest NTC resistor
value from the manufacturer is 467k Ω . The series resistance
is given by Equation 17 as follows:
R S = 20k Ω – R NTC_105 ° C = 20k Ω – 15.65k Ω = 4.35k Ω
(EQ. 17)
accurate load line in accordance with the IMVP-6+
specification.
DESIGN EXAMPLE
The process of compensation for DCR resistance variation
to achieve the desired load line droop has several steps and
may be iterative.
A two-phase solution using DCR sensing is shown in Figure 37.
There are two resistors connecting to the terminals of inductor
of each phase. These are labeled RS and RO. These resistors
are used to obtain the DC voltage drop across each inductor.
The DC current flowing through each inductor will create a DC
voltage drop across the real winding resistance (DCR). This
voltage is proportional to the average inductor current by Ohm’s
Law. When this voltage is summed with the other channel’s DC
voltage, the total DC load current can be derived.
10μA
OCSET
RS EQV = --------
OC
-
+
INTERNAL TO
+
DROOP
-
VSUM
DFB
VSUM
RS
2
Vdcr EQV = I OUT × -------------
ISL6266
+
+
1 -
DROOP
+
DCR
2
+
-
+
+
1 -
Cn
VN
( R ntc + R series ) × R par
( R ntc + R series ) + R par
VDIFF
RTN VSEN
VO'
-
Rn = ---------------------------------------------------------------
RO EQV = ---------
VO'
RO
2
FIGURE 40. EQUIVALENT MODEL FOR DROOP AND DIE SENSING USING DCR SENSING
25
FN6398.3
June 14, 2010
相关PDF资料 |
PDF描述 |
|---|---|
| ABM28DTKN | CONN EDGECARD 56POS DIP .156 SLD |
| X40021S14I-AT1 | IC VOLTAGE MONITOR DUAL 14-SOIC |
| 2512-102K | INDUCTOR POWER 1.0UH MOLDED SMD |
| RCC65DCMD | CONN EDGECARD 130POS .100 WW |
| RCA43DTBI | CONN EDGECARD 86POS R/A .125 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6266HRZ-T | 功能描述:IC CORE CTRLR 2PHASE 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°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 |
| ISL6267 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Multiphase PWM Regulator for AMD Fusion Mobile CPUs |
| ISL6267EVAL1Z | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Multiphase PWM Regulator for AMD Fusion Mobile CPUs |
| ISL6267HRZ | 功能描述:电流型 PWM 控制器 MULTI-OUTPUT CNTRLR FOR AMD FUSION UP 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 |
| ISL6267HRZ-T | 功能描述:电流型 PWM 控制器 MULTI-OUTPUT CNTRLR FOR AMD FUSION UP 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 |
发布紧急采购，3分钟左右您将得到回复。