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參數(shù)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(shù)： | 17/19頁 |
| 文件大?。?/td> | 540K |
| 代理商： | ISL6557ACBZ |
17
Application
on page 3). Figure 14 and Equation 26 are
provided to assist in the selecting the correct value for RT.
Input Capacitor Selection
The input capacitors are responsible for sourcing the ac
component of the input current flowing into the upper
MOSFETs. Their rms current capacity must be sufficient to
handle the ac component of the current drawn by the upper
MOSFETs which is related to duty cycle and the number of
active phases.
Figures 15, 16 and 17 can be used to determine the input-
capacitor rms current as of duty cycle, maximum sustained
output current (I
O
), and the ratio of the combined peak-to-
peak inductor current (I
L,PP
as defined in Equation 1) to the
maximum sustained load current, I
O
. Figure 18 is provided
as a reference to demonstrate the dramatic reductions in
input-capacitor rms current upon the implementation of the
multiphase topology.
FIGURE 14. RT VS SWITCHING FREQUENCY
100
1000
10000
10
SWITCHING FREQUENCY (KHZ)
10
100
1000
R
)
RT
10
11.09
1.13
f
S
(
)
log
–
[
]
=
(EQ. 26)
0.3
0.1
0
0.2
I
R
/
O
)
FIGURE 15. NORMALIZED INPUT-CAPACITOR RMS CURRENT
VS DUTY CYCLE FOR 2-PHASE CONVERTER
0
0.4
1.0
0.2
0.6
0.8
DUTY CYCLE ( V
IN
/ V
O
)
I
L,PP
= 0
I
L,PP
= 0.5 I
O
I
L,PP
= 0.75 I
O
DUTY CYCLE ( V
IN
/ V
O
)
FIGURE 16. NORMALIZED INPUT-CAPACITOR RMS CURRENT
VS DUTY CYCLE FOR 3-PHASE CONVERTER
0
0.4
1.0
0.2
0.6
0.8
I
R
/
O
0.3
0.1
0
0.2
I
L,PP
= 0
I
L,PP
= 0.25 I
O
I
L,PP
= 0.5 I
O
I
L,PP
= 0.75 I
O
ISL6557A
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| 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 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(chǎn)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(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) |
| 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(guān)控制器 Precision MultiPhase RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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