- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383157 > ISL6559CB-T (INTERSIL CORP) Multi-Phase PWM Controller PDF資料下載
參數(shù)資料
| 型號： | ISL6559CB-T |
| 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： | PLASTIC, MS-013-AE, SOIC-28 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 606K |
| 代理商： | ISL6559CB-T |
18
FN9084.8
December 29, 2004
Application
on page 3). Figure 15 and Equation 29 are
provided to assist in the selecting the correct value for R
T
.
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.
For a two phase design, use Figure 15 to determine the
input-capacitor RMS current requirement given the duty
cycle, maximum sustained output current (I
O
), and the ratio
of the combined peak-to-peak inductor current (I
C,PP
) to I
O
.
Select a bulk capacitor with a ripple current rating which will
minimize the total number of input capacitors required to
support the RMS current calculated. The voltage rating of
the capacitors should also be at least 1.25 times greater
than the maximum input voltage.
Figures 16 and 17 provide the same input RMS current
information for three and four phase designs respectively.
Use the same approach to selecting the bulk capacitor type
and number as described above.
Low capacitance, high-frequency ceramic capacitors are
needed in addition to the bulk capacitors to suppress leading
and falling edge voltage spikes.The result from the high
current slew rates produced by the upper MOSFETs turn on
and off. Select low ESL ceramic capacitors and place one as
close as possible to each upper MOSFET drain to minimize
board parasitics and maximize suppression.
FIGURE 14. R
T
vs SWITCHING FREQUENCY
100
1000
10000
10
SWITCHING FREQUENCY (kHz)
10
100
1000
R
T
)
R
T
10
11.09
1.13
f
S
(
)
log
–
[
]
=
(EQ. 29)
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
C,PP
= 0
I
C,PP
= 0.5 I
O
I
C,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
C,PP
= 0
I
C,PP
= 0.25 I
O
I
C,PP
= 0.5 I
O
I
C,PP
= 0.75 I
O
I
R
/
O
)
FIGURE 17. NORMALIZED INPUT-CAPACITOR RMS CURRENT
VS DUTY CYCLE FOR 4-PHASE CONVERTER
0
0.4
1.0
0.2
0.6
0.8
DUTY CYCLE (V
IN
/ V
O
)
0.3
0.1
0
0.2
I
C,PP
= 0
I
C,PP
= 0.25 I
O
I
C,PP
= 0.5 I
O
I
C,PP
= 0.75 I
O
ISL6559
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6559CR-T | Multi-Phase PWM Controller |
| ISL6559CRZ | Multi-Phase PWM Controller |
| ISL6559CRZ-T | Multi-Phase PWM Controller |
| ISL6559 | Multi-Phase PWM Controller |
| ISL6559CB | Multi-Phase PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6559CBZ | 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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| 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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復。