- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383158 > ISL6563IRZ (INTERSIL CORP) Two-Phase Multi-Phase Buck PWM Controller with Integrated MOSFET Drivers PDF資料下載
參數(shù)資料
| 型號(hào)： | ISL6563IRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Two-Phase Multi-Phase Buck PWM Controller with Integrated MOSFET Drivers |
| 中文描述： | SWITCHING CONTROLLER, 255 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, MO-220-VGGD-2, QFN-24 |
| 文件頁數(shù)： | 8/19頁 |
| 文件大?。?/td> | 516K |
| 代理商： | ISL6563IRZ |
8
FN9126.6
April 13, 2005
Assuming identical power switch selection on the two
channels, the following equation determines the current fed
out the FB pin for output voltage droop generation:
where, r
DS(ON)
- lower MOSFET/s’ ON resistance (@5V)
I
PHASE
- average phase current
Multiphase Power Conversion
Multiphase power conversion provides a 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
multiphase approach offers cost-saving advantages with
improved response time, superior ripple cancellation, and
thermal distribution.
INTERLEAVING
The switching of each channel in an ISL6563-based
converter is timed to be symmetrically out of phase with the
other channel. As a result, the two-phase converter has a
combined ripple frequency twice the frequency of one of its
phases. In addition, the peak-to-peak amplitude of the
combined inductor currents is proportionately reduced.
Increased ripple frequency and lower ripple amplitude
generally translate to lower per-channel inductance and
lower total output capacitance for a given set of performance
specifications.
Figure 2 illustrates the additive effect on output ripple
frequency. The two channel currents (I
L1
and I
L2
), combine
to form the AC ripple current and the DC load current. The
ripple component has two times the ripple frequency of each
individual channel current.
To understand the reduction of ripple current amplitude in the
multiphase circuit, examine the equation representing an
individual channel’s peak-to-peak inductor current.
V
IN
and V
OUT
are the input and output voltages,
respectively, L is the single-channel inductor value, and f
S
is
the switching frequency.
The output capacitors conduct the ripple component of the
inductor current. In the case of multiphase converters, the
capacitor current is the sum of the ripple currents from each
of the individual channels. Peak-to-peak ripple current, I
PP
,
decreases by an amount proportional to the number of
channels. Output-voltage ripple is a function of capacitance,
capacitor equivalent series resistance (ESR), and inductor
ripple current. Reducing the inductor ripple current allows
the designer to use fewer or less costly output capacitors
(should output ripple be an important design parameter).
Another benefit of interleaving is the reduction of input ripple
current. Input capacitance is determined in a large part by
the maximum input ripple current. Multiphase topologies can
improve overall system cost and size by lowering input ripple
current and allowing the designer to reduce the cost of input
capacitance. The example in Figure 3 illustrates input
currents from a two-phase converter combining to reduce
the total input ripple current.
I
FB
r
------------------------------------------------
I
ISEN
=
FIGURE 2. PWM AND INDUCTOR-CURRENT WAVEFORMS
FOR 2-PHASE CONVERTER
PWM2
PWM1
I
L2
I
L1
I
L1
+ I
L2
I
L PP
V
---------------------------------------------------------
V
S
–
(
)
V
IN
=
I
PP
V
-------------------------------------------------------------------
N
S
V
–
(
)
V
IN
=
FIGURE 3. INPUT CAPACITOR CURRENT AND INDIVIDUAL
CHANNEL CURRENTS IN A 2-PHASE
CONVERTER
Q1 D-S CURRENT
Q3 D-S CURRENT
C
IN
CURRENT
ISL6563
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6564 | PWM Controller with Wide Input Range 8-CDIP -55 to 125 |
| ISL6564IR-T | Multi-Phase PWM Controller with Linear 6-bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing |
| ISL6564CR | Multi-Phase PWM Controller with Linear 6-bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing |
| ISL6564CRZ | Voltage Tracking Termination Regulator 8-SOIC -20 to 85 |
| ISL6564CRZ-T | Multi-Phase PWM Controller with Linear 6-bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6563IRZ-T | 功能描述:電流型 PWM 控制器 P6 TWO PHS CONT INTEGRTD DRVRS DESKT RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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 |
| ISL6564ACRZ | 功能描述:IC REG CTRLR BUCK PWM VM 40-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(biāo)準(zhǔn)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) |
| ISL6564ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 40-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(biāo)準(zhǔn)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) |
| ISL6564AIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 40-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(biāo)準(zhǔn)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) |
| ISL6564AIRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 40-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(biāo)準(zhǔn)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)。