參數(shù)資料
型號(hào)： ISL6310IRZ
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Two-Phase Buck PWM Controller with High Current Intergrated MOSFET Driver
中文描述： SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220VHHD-2, QFN-32
文件頁(yè)數(shù)： 21/27頁(yè)
文件大?。?/td> 711K
代理商： ISL6310IRZ
21
FN9209.2
October 19, 2005
yields a solution that is always stable with very close to ideal
transient performance.
The feedback resistor, R
1
, has already been chosen as
outlined in
Load-Line Regulation Resistor.
Select a target
bandwidth for the compensated system, F
0
. The target
bandwidth must be large enough to assure 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 Equations 28, L is the per-channel filter inductance
divided by the number of active channels; C is the sum total
of all output capacitors; ESR is the equivalent series
resistance of the bulk output filter capacitance; and V
OSC
is
the peak-to-peak sawtooth signal amplitude as described in
the
Electrical Specifications
.
Once selected, the compensation values in Equations 28
assure a stable converter with reasonable transient
performance. In most cases, transient performance can be
improved by making adjustments to R
2
. Slowly increase the
value of R
2
while observing the transient performance on an
oscilloscope until no further improvement is noted. Normally,
C
1
will not need adjustment. Keep the value of C
1
from
Equations 28 unless some performance issue is noted.
The optional capacitor C
2
, is sometimes needed to bypass
noise away from the PWM comparator (see Figure 20). 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.
Compensating the Converter operating without
Load-Line Regulation
The ISL6310 multi-phase converter operating without load
line regulation behaves in a similar manner to a voltage-
mode controller. This section highlights the design
consideration for a voltage-mode controller requiring external
compensation. To address a broad range of applications, a
type-3 feedback network is recommended (see Figure 21).
Figure 22 highlights the voltage-mode control loop for a
synchronous-rectified buck converter, applicable, with a
small number of adjustments, to the multi-phase ISL6310
circuit. The output voltage (V
OUT
) is regulated to the
reference voltage, VREF, level. The error amplifier output
(COMP pin voltage) is compared with the oscillator (OSC)
modified saw-tooth wave to provide a pulse-width modulated
wave with an amplitude of V
IN
at the PHASE node. The
PWM wave is smoothed by the output filter (L and C). The
output filter capacitor bank’s equivalent series resistance is
represented by the series resistor ESR.
The modulator transfer function is the small-signal transfer
function of V
OUT
/V
COMP
. This function is dominated by a
DC gain, given by d
MAX
V
IN
/V
OSC
, and shaped by the
output filter, with a double pole break frequency at F
LC
and a
zero at F
CE
. For the purpose of this analysis, L and DCR
represent the individual channel inductance and its DCR
divided by 2 (equivalent parallel value of the two output
inductors), while C and ESR represents the total output
capacitance and its equivalent series resistance.
2
π
L C
-----------1
F
0
>
R
2
R
1
2
π
F
V
IN
0.66 V
π
V
OSC
R
1
f
0
L C
-----------------0.66 V
=
C
1
2
=
Case 1:
2
π
L C
-----------1
F
0
π
C ESR
2
<
≤
R
2
R
1
V
---------------------------------------------------------------
2
π
(
)
2
F
2
L C
0.66 V
IN
0.66 V
=
C
1
2
π
(
)
F
0
V
OSC
R
1
L C
-------------------------------------------------------------------------------
=
Case 2:
(EQ. 28)
F
0
2
π
C ESR
---------------1
>
R
2
R
1
2
π
F
V
L
0.66 V
IN
ESR
-----------------------------------------------
=
C
2
0.66 V
ESR
2
π
V
OSC
R
1
F
0
L
------------------------------------------------------C
=
Case 3:
FIGURE 21. COMPENSATION CONFIGURATION FOR
NON-LOAD-LINE REGULATED ISL6310 CIRCUIT
ISL6310
COMP
C
1
R
2
R
1
FB
VDIFF
C
2
R
3
C
3
F
LC
2
π
L C
---------------------------
=
F
CE
---------------------------------
=
ISL6310
相關(guān)PDF資料
PDF描述
ISL6431A Advanced Pulse Width Modulation (PWM) Controller for Broadband Applications
ISL6431ACB Advanced Pulse Width Modulation (PWM) Controller for Broadband Applications
ISL6520A Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
ISL6525CBZ Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller
ISL6525 Adjustable Precision Shunt Regulator 5-SOT-23 -40 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL6310IRZ-T 功能描述:電壓模式 PWM 控制器 W/ANNEAL 2-PH PWM CNTROL W/2-DRVRS RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
ISL6312ACRZ 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
ISL6312ACRZ-T 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
ISL6312AIRZ 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
ISL6312AIRZ-T 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*