参数资料
| 型号： | ISL6313CRZ-T |
| 厂商： | Intersil |
| 文件页数： | 28/33页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM 2PHASE BUCK 36-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 4,000 |
| 应用： | 控制器，Intel VR11，AMD CPU |
| 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： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 带卷 (TR) |
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ISL6313
C 2 (OPTIONAL)
-------------------------------- > f 0
Case 1:
1
2 ? π ? L ? C
R C = R FB ? ----------------------------------------------------------
V
2 ? π ? V P-P ? R FB ? f 0
R C
C C
COMP
FB
ISL6313
2 ? π ? f 0 ? V P-P ? L ? C
IN
V IN
C C = ------------------------------------------------------
R FB
-------------------------------- ≤ f 0 < -------------------------------------
VSEN
Case 2:
1 1
2 ? π ? L ? C 2 ? π ? C ? ESR
V P-P ? ( 2 ? π ) 2 ? f 02 ? L ? C
C C = ---------------------------------------------------------------------------------------
P-P ? R FB ?
( 2 ? π ) 2 ? f 2 ? V L ? C
FIGURE 22. COMPENSATION CONFIGURATION FOR
LOAD-LINE REGULATED ISL6313 CIRCUIT
Since the system poles and zero are affected by the values
of the components that are meant to compensate them, the
solution to the system equation becomes fairly complicated.
V
R C = R FB ? ------------------------------------------------------------------
IN
V IN
0
(EQ. 41)
f 0 > -------------------------------------
R C = R FB ? ----------------------------------------------
V ? ESR
2 ? π ? V P-P ? R FB ? f 0 ? L
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.
Select a target bandwidth for the compensated system, f 0 .
The target bandwidth must be large enough to assure
Case 3:
1
2 ? π ? C ? ESR
2 ? π ? f 0 ? V P-P ? L
IN
V IN ? ESR ? C
C C = ------------------------------------------------------------------
adequate transient performance, but smaller than 1/3 of the
per-channel switching frequency. The values of the
compensation components depend on the relationships of f 0
to the L-C pole frequency and the ESR zero frequency. For
each of the following three, there is a separate set of
equations for the compensation components.
In Equation 41, L is the per-channel filter inductance divided
by the number of active channels; C is the sum total of all
COMPENSATION WITHOUT LOAD-LINE REGULATION
The non load-line regulated converter is accurately modeled
as a voltage-mode regulator with two poles at the L-C
resonant frequency and a zero at the ESR frequency. A
type III controller, as shown in Figure 23, provides the
necessary compensation.
C 2
output capacitors; ESR is the equivalent series resistance of
the bulk output filter capacitance; and V P-P is the
R C
C C
COMP
peak-to-peak sawtooth signal amplitude as described in the
“Electrical Specifications” on page 6.
FB
Once selected, the compensation values in Equation 41
assure a stable converter with reasonable transient
performance. In most cases, transient performance can be
improved by making adjustments to R C . Slowly increase the
value of R C while observing the transient performance on an
oscilloscope until no further improvement is noted. Normally,
C 1
R 1
R FB
VSEN
ISL6313
C C will not need adjustment. Keep the value of C C from
Equation 41 unless some performance issue is noted.
The optional capacitor C 2 , is sometimes needed to bypass
noise away from the PWM comparator (see Figure 22). Keep
a position available for C 2 , and be prepared to install a
high-frequency capacitor of between 22pF and 150pF in
case any leading edge jitter problem is noted.
28
FIGURE 23. COMPENSATION CIRCUIT WITHOUT LOAD-LINE
REGULATION
The first step, is to choose the desired bandwidth, f 0 , of the
compensated system. Choose a frequency high enough to
assure adequate transient performance but not higher than
1/3 of the switching frequency. The type-III compensator has
an extra high-frequency pole, f HF . This pole can be used for
added noise rejection or to assure adequate attenuation at
the error-amplifier high-order pole and zero frequencies. A
FN6448.2
September 2, 2008
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| ISL6313IRZ | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6313IRZ-T | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6314CRZ | 功能描述:电压模式 PWM 控制器 1-PH PWM CNTRLR W/1 INTEGRTD DRVRS 32LD RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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