參數(shù)資料
型號： MAX15004BAUE
廠商： Maxim Integrated Products, Inc.
英文描述： 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers
中文描述： 4.5V至40V輸入汽車反激/升壓/ SEPIC電源控制器
文件頁數(shù)： 16/29頁
文件大小： 547K
代理商： MAX15004BAUE
M
Input Capacitor Selection in Boost Configuration
The input current for the boost converter is continuous
and the RMS ripple current at the input capacitor is low.
Calculate the minimum input capacitor value and maxi-
mum ESR using the following equations:
where:
V
DS
is the total voltage drop across the external MOS-
FET plus the voltage drop across the inductor ESR.
I
L
is peak-to-peak inductor ripple current as calculated
above.
V
Q
is the portion of input ripple due to the
capacitor discharge and
V
ESR
is the contribution due
to ESR of the capacitor. Assume the input capacitor rip-
ple contribution due to ESR (
V
ESR
) and capacitor dis-
charge (
V
Q
) is equal when using a combination of
ceramic and aluminum capacitors. During the convert-
er turn-on, a large current is drawn from the input
source especially at high output to input differential.
The MAX15004/MAX15005 are provided with a pro-
grammable soft-start, however, a large storage capaci-
tor at the input may be necessary to avoid chattering
due to finite hysteresis.
Output Capacitor Selection in Boost Configuration
For the boost converter, the output capacitor supplies
the load current when the main switch is on. The
required output capacitance is high, especially at higher
duty cycles. Also, the output capacitor ESR needs to be
low enough to minimize the voltage drop due to the ESR
while supporting the load current. Use the following
equations to calculate the output capacitor, for a speci-
fied output ripple. All ripple values are peak-to-peak.
I
(V
V
) D
L f
L
IN
DS
OUT
=
C
I
D
×
4 f
V
V
ESR
I
IN
L
OUT
ESR
L
Q
=
×
=
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
16
______________________________________________________________________________________
Figure 5. Application Schematic
MAX15004A/B
MAX15005A/B
IN
C
VCC
4.7
μ
F
R
VCC
D
VCC
D
VIN
R
CS
D3
PGND
Q
L
RS
C
OUT
RB
RA
C
VIN
1
μ
F
REG5
SS
9
SLOPE
4
11
6
13
16
15
12
1
10
RT
CT
V
CC
OUT
CS
V
OUT
18V
RTCT
COMP
C
REG5
0.1
μ
F
V
IN
C
IN
C
CS
C
SS
C
SLOPE
RF
CF
FB
C
FF
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
MAX15004BAUE/V+ 功能描述:電流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 開關頻率: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
MAX15004BAUE/V+T 功能描述:電流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 開關頻率: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
MAX15004BAUE+ 功能描述:電流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 開關頻率: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
MAX15004BAUE+T 功能描述:電流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 開關頻率: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
MAX15005AAUE/V+ 功能描述:電流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 開關頻率: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
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