参数资料
| 型号： | ISL6334CIRZ-T |
| 厂商： | Intersil |
| 文件页数： | 26/30页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM SYNC BUCK 40-QFN |
| 标准包装： | 4,000 |
| 应用： | 控制器，Intel VR11.1 |
| 输入电压： | 3 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： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN（6x6） |
| 包装： | 带卷 (TR) |
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页第25页当前第26页第27页第28页第29页第30页
ISL6334B, ISL6334C
to be 1.2x the maximum load current of the specific
application.
With integrated temperature compensation, the sensed
current signal is independent on the operational temperature
of the power stage, i.e. the temperature effect on the current
sense element R X is cancelled by the integrated
temperature compensation function. R X in Equation 29
should be the resistance of the current sense element at the
where N is the active channel number, R ISEN is the sense
resistor connected to the ISEN+ pin, and R X is the
resistance of the current sense element, either the DCR of
the inductor or R SENSE depending on the sensing method.
If one or more of the current sense resistors are adjusted for
thermal balance (as in Equation 30), the load-line regulation
resistor should be selected based on the average value of
the current sensing resistors, as given in Equation 33:
R X
room temperature.
When the integrated temperature compensation function is
R LL
R FB = ----------
∑ R ISEN ( n )
n
(EQ. 33)
disabled by pulling the TCOMP pin to GND, the sensed
current will be dependent on the operational temperature of
the power stage, since the DC resistance of the current
sense element may be changed according to the operational
temperature. R X in Equation 29 should be the maximum DC
resistance of the current sense element at the all operational
temperature.
In certain circumstances, it may be necessary to adjust the
value of one or more ISEN resistors. When the components
of one or more channels are inhibited from effectively
dissipating their heat so that the affected channels run hotter
than desired, choose new, smaller values of RISEN for the
affected phases (see the section entitled “Channel-Current
desired decrease in temperature rise in order to cause
proportionally less current to flow in the hotter phase, as
shown in Equation 30:
where R ISEN(n) is the current sensing resistor connected to
the n th ISEN+ pin.
Compensation
The two opposing goals of compensating the voltage
regulator are stability and speed. Depending on whether the
regulator employs the optional load-line regulation as
described in Load-Line Regulation, there are two distinct
methods for achieving these goals.
COMPENSATING LOAD-LINE REGULATED
CONVERTER
The load-line regulated converter behaves in a similar
manner to a peak-current mode controller because the two
poles at the output-filter L-C resonant frequency split with
the introduction of current information into the control loop.
The final location of these poles is determined by the system
function, the gain of the current signal, and the value of the
R ISEN , 2 = R ISEN ---------- 2
Δ T
Δ T 1
(EQ. 30)
compensation components, R C and C C .
Since the system poles and zero are affected by the values
In Equation 30, make sure that Δ T 2 is the desired temperature
rise above the ambient temperature, and Δ T 1 is the measured
temperature rise above the ambient temperature. While a
single adjustment according to Equation 30 is usually
sufficient, it may occasionally be necessary to adjust R ISEN
two or more times to achieve optimal thermal balance
between all channels.
Load-Line Regulation Resistor
The load-line regulation resistor is labelled R FB in Figure 6.
Its value depends on the desired loadline requirement of the
of the components that are meant to compensate them, the
solution to the system equation becomes fairly complicated.
Fortunately there is a simple approximation that comes very
close to an optimal solution. Treating the system as though it
were a voltage-mode regulator by compensating the L-C
poles and the ESR zero of the voltage-mode approximation
yields a solution that is always stable with very close to ideal
transient performance.
C 2 (OPTIONAL)
I FL
application.
The desired loadline can be calculated using Equation 31:
V DROOP
R LL = -------------------------
(EQ. 31)
where I FL is the full load current of the specific application,
and VR DROOP is the desired voltage droop under the full
load condition.
R FB
R C
+
V DROOP
-
C C
COMP
FB
VDIFF
Based on the desired loadline R LL , the loadline regulation
resistor can be calculated using Equation 32:
NR R
R FB = ----------------------------------
ISEN LL
R X
26
(EQ. 32)
FIGURE 17. COMPENSATION CONFIGURATION FOR
LOAD-LINE REGULATED ISL6334B, ISL6334C
CIRCUIT
FN6689.2
August 31, 2010
相关PDF资料 |
PDF描述 |
|---|---|
| RMM30DRSD-S288 | CONN EDGECARD 60POS .156 EXTEND |
| EYM40DRST | CONN EDGECARD 80POS DIP .156 SLD |
| X40031S14I-BT1 | IC VOLTAGE MONITOR TRPL 14-SOIC |
| RMM15DRMD | CONN EDGECARD 30POS .156 WW |
| EGM40DRST | CONN EDGECARD 80POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6334CRZ | 功能描述:IC CTRLR PWM 4PHASE BUCK 40-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 |
| ISL6334CRZ-T | 功能描述:IC CTRLR PWM 4PHASE BUCK 40-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 |
| ISL6334DCRZ | 功能描述:IC CTRLR PWM 4PHASE VR11.1 40QFN 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 |
| ISL6334DCRZ-T | 功能描述:IC CTRLR PWM 4PHASE VR11.1 40QFN 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 |
| ISL6334DIRZ | 功能描述:IC CTRLR PWM 4PHASE VR11.1 40QFN 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 |
发布紧急采购，3分钟左右您将得到回复。