- 您現(xiàn)在的位置：買賣IC網 > PDF目錄383156 > ISL6557ACBZ (INTERSIL CORP) Multi-Phase PWM Controller for Core-Voltage Regulation PDF資料下載
參數資料
| 型號： | ISL6557ACBZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multi-Phase PWM Controller for Core-Voltage Regulation |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | LEAD FREE, PLASTIC, MS-013AD, SOIC-24 |
| 文件頁數： | 6/19頁 |
| 文件大?。?/td> | 540K |
| 代理商： | ISL6557ACBZ |
6
Operation
Multi-Phase Power Conversion
Multi-phase power conversion provides the most cost-
effective power solution when load currents are no longer
easily supported by single-phase converters. Although its
greater complexity presents additional technical challenges,
the multi-phase approach offers cost-saving advantages with
improved response time, superior ripple cancellation, and
excellent thermal distribution.
INTERLEAVING
The switching of each channel in a multi-phase converter is
timed to be symmetrically out of phase with each of the other
channels. In a 4-phase converter, each channel switches 1/4
cycle after the previous channel and 1/4 cycle before the
following channel. As a result, the four-phase converter has
a combined ripple frequency four times greater than the
ripple frequency of any one phase. In addition, the peak-to-
peak amplitude of the combined inductor currents is reduced
in proportion to the number of phases (Equations 1 and 2).
Increased ripple frequency and lower ripple amplitude mean
that the designer can use less per-channel inductance and
lower total output capacitance for any performance
specification.
R
ISEN1
ERROR
AMPLIFIER
FB
ISEN1
V
OUT
PWM1
H
+
-
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6557A IN A 3-PHASE CONVERTER
I
OUT
μ
P
LOAD
C
O
x 1
+
-
VSEN
RGND
VDIFF
DAC
&
REFERENCE
COMP
VIN
R
ISEN2
ISEN2
PWM2
H
R
ISEN3
ISEN3
PWM3
H
VIN
VIN
L
1
L
2
L
3
+
PWM
CIRCUIT
CURRENT
SENSE
AVERAGE
+
+
-
-
-
+
-
-
+
+
-
CURRENT
SENSE
CURRENT
SENSE
PWM
CIRCUIT
PWM
CIRCUIT
FIGURE 2. PWM AND INDUCTOR-CURRENT WAVEFORMS
FOR 3-PHASE CONVERTER
1
μ
s/DIV
PWM2, 5V/DIV
PWM1, 5V/DIV
IL2, 7A/DIV
IL1, 7A/DIV
IL1 + IL2 + IL3, 7A/DIV
IL3, 7A/DIV
PWM3, 5V/DIV
ISL6557A
相關PDF資料 |
PDF描述 |
|---|---|
| ISL6557ACBZ-T | Multi-Phase PWM Controller for Core-Voltage Regulation |
| ISL6557CB-T | Multi-Phase PWM Controller for Core-Voltage Regulation |
| ISL6557 | PWM Controller with Wide Input Voltage Range 8-SOIC -20 to 85 |
| ISL6557CB | PWM Controller with Wide Input Voltage Range 8-PDIP -20 to 85 |
| ISL6558CRZA-T | Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positioning |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6557ACBZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 24-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產品培訓模塊: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: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) |
| ISL6557CB | 制造商:Intersil Corporation 功能描述: |
| ISL6557CB-T | 制造商:Intersil Corporation 功能描述: |
| ISL6557CB-T WAF | 制造商:Intersil Corporation 功能描述: |
| ISL6558CB | 功能描述:DC/DC 開關控制器 Precision MultiPhase RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復。