- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383157 > ISL6559CBZ (INTERSIL CORP) Multi-Phase PWM Controller PDF資料下載
參數(shù)資料
| 型號： | ISL6559CBZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multi-Phase PWM Controller |
| 中文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | LEAD FREE, PLASTIC, MS-013-AE, SOIC-28 |
| 文件頁數(shù)： | 16/21頁 |
| 文件大小： | 606K |
| 代理商： | ISL6559CBZ |
16
FN9084.8
December 29, 2004
each of the three cases which follow, there is a separate set
of equations for the compensation components.
In Equations 23, 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
PP
is
the peak-to-peak sawtooth signal amplitude as described in
Figure 4 and
Electrical Specifications
.
Once selected, the compensation values in Equations 23
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
C
will not need adjustment. Keep the value of C
C
from
Equations 23 unless some performance issue is noted.
The optional capacitor C
2
, is sometimes needed to bypass
noise away from the PWM comparator (see Figure 12). Keep
a position available for C
2
, and be prepared to install a high-
frequency capacitor of between 22pF and 150pF in case any
trailing edge jitter problem is noted.
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 13, provides the
necessary compensation.
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 good general
rule is to chose f
HF
= 10f
0
, but it can be higher if desired.
Choosing f
HF
to be lower than 10f
0
can cause problems with
too much phase shift below the system bandwidth
.
In the solutions to the compensation equations, there is a single
degree of freedom. For the solutions presented in Equations
24, R
FB
is selected arbitrarily. The remaining compensation
components are then selected according to Equations 24.
2
π
LC
-------1
f
0
>
R
C
R
FB
2
π
f
V
LC
IN
0.75V
π
V
PP
R
FB
f
0
-------0.75V
=
C
C
2
=
Case 1:
2
π
LC
--------1
f
0
π
C ESR
)
2
<
≤
R
C
R
FB
V
2
π
IN
0.75V
)
2
f
02
V
PP
R
FB
LC
(
)
2
f
0
2
LC
-----------0.75 V
=
C
C
2
π
(
------------------------------------------------------------
=
Case 2:
(EQ. 23)
f
0
2
)
------C ESR
>
R
C
R
FB
2
π
f
V
L
IN
ESR
(
)
0.75 V
=
C
C
0.75V
ESR
2
π
V
PP
R
FB
f
0
L
-------------------------------------------- C
=
Case 3:
FIGURE 13. COMPENSATION CIRCUIT FOR ISL6559 BASED
CONVERTER WITHOUT LOAD-LINE
REGULATION.
I
COMP
C
C
R
C
R
FB
FB
IOUT
VDIFF
C
2
C
1
R
1
C
C
0.75V
2
π
f
LC 1
2
π
(
)
2
f
0
f
HF
LCR
FB
V
PP
–
------------------------------------------------------------------
=
R
C
V
2
π
--------------------------------------------------------------------
2
f
f
LCR
0.75V
IN
2
π
f
HF
LC 1
–
=
R
1
R
FB
LC
–
)
C ESR
)
--------C ESR
=
C
1
C ESR
(
R
FB
)
–
----LC
=
C
2
0.75V
2
π
(
)
2
f
0
f
HF
LCR
FB
V
PP
------------------------------------------------------------------
=
(EQ. 24)
ISL6559
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6559CB-T | Multi-Phase PWM Controller |
| ISL6559CR-T | Multi-Phase PWM Controller |
| ISL6559CRZ | Multi-Phase PWM Controller |
| ISL6559CRZ-T | Multi-Phase PWM Controller |
| ISL6559 | Multi-Phase PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6559CBZ-T | 功能描述:電流型 PWM 控制器 2 TO 4 PHS BUCK CNTRLR 2 8LD RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6559CR | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL6559CR-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL6559CRZ | 功能描述:電流型 PWM 控制器 2 TO 4 PHS BUCK CNTRLR 32L 5X5 MLFP RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6559CRZR5265 | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。