參數(shù)資料
型號： MAX1980
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： Quick-PWM Slave Controller with Driver Disable for Multiphase DC-DC Converter
中文描述： Quick-PWM從控制器，帶有驅(qū)動(dòng)禁止功能，用于多相DC-DC轉(zhuǎn)換器
文件頁數(shù)： 22/33頁
文件大?。?/td> 1153K
代理商： MAX1980
M
Quick-PWM Slave Controller with
Driver Disable for Multiphase DC-DC Converter
22
______________________________________________________________________________________
In non-CPU applications, the output capacitor selection
often depends on how much ESR is needed to maintain
an acceptable level of output ripple voltage. The output
ripple voltage of a step-down controller equals the total
inductor ripple current multiplied by the output capaci-
tor
’
s ESR. When operating multiphase systems out-of-
phase, the peak inductor currents of each phase are
staggered, resulting in lower output ripple voltage by
reducing the total inductor ripple current. For out-of-
phase operation, the maximum ESR to meet ripple
requirements is:
This equation may be rewritten as the single phase rip-
ple current minus a correction due to the additional
phases:
where t
TRIG
is the MAX1980
’
s trigger propagation
delay,
η
is the number of phases, and K is from Table
3. When operating the MAX1980 in-phase (POL =
GND), the high-side MOSFETs turn on together, so the
output capacitors must simultaneously support the
combined inductor ripple currents of each phase.
R
V
I
LIR
)
V
L
t
t
ESR
RIPPLE
)
LOAD MAX
OUT
ON
TRIG
≤
+
(
)
(
η η
1
R
V
L
V
V
f
V
V
V
ESR
RIPPLE
IN
OUT
SW
OUT
IN
OUT TRIG
≤
(
)
η
η
η
1
0
20
40
60
80
100
120
140
160
0
10
20
30
40
50
SLAVE CURRENT-LIMIT VOLTAGES
vs. AVERAGE INDUCTOR CURRENT
AVERAGE INDUCTOR CURRENT (A)
V
I
ADJ(MIN)
= I
PEAK
= V
ITHS
V
ITHM(HIGH)
R
CM
V
ITHM(LOW)
V
ITHS
I
ADJ
-
I
INDUCTOR
=
R
CM
I
LM(PEAK)
= R
CS
I
LS(PEAK)
R
CM
I
LM(VALLEY)
= R
CS
I
LS(VALLEY)
V
OUT
(V
IN
- V
OUT
)
V
IN
f
SW
L
[
]
0
20
40
60
80
100
120
140
160
0
10
20
30
40
50
MASTER CURRENT-LIMIT VOLTAGES
vs. AVERAGE INDUCTOR CURRENT
AVERAGE INDUCTOR CURRENT (A)
V
V
ITHM(HIGH)
V
ITHM(LOW)
R
DS(ON)(MIN)
= L
LM(VALLEY)
ADJUSTED
I
LIMIT
≤
I
INDUCTOR
UNADJUSTED
I
LIMIT
≤
I
LIMIT
= V
ITHM(HIGH)
R
DS(ON)(MIN)
= L
LM(VALLEY)
MASTER
CONTROLLER
SLAVE
CONTROLLER
A
RDS
- 1
R
DS(ON)(MAX)
(
)
Figure 6. Master/Slave Current-Limit Thresholds
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1980EGP 功能描述:DC/DC 開關(guān)控制器 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(fēng)格: 封裝 / 箱體:CPAK
MAX1980EGP-T 功能描述:DC/DC 開關(guān)控制器 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(fēng)格: 封裝 / 箱體:CPAK
MAX1980ETP 功能描述:DC/DC 開關(guān)控制器 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(fēng)格: 封裝 / 箱體:CPAK
MAX1980ETP+ 功能描述:DC/DC 開關(guān)控制器 PWM Slave Controller w/Driver Disable 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(fēng)格: 封裝 / 箱體:CPAK
MAX1980ETP+T 功能描述:DC/DC 開關(guān)控制器 PWM Slave Controller w/Driver Disable 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(fēng)格: 封裝 / 箱體:CPAK
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