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参数资料
| 型号： | MAX15005BAUE |
| 厂商： | 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输入汽车反激/升压/ SEPIC电源控制器 |
| 文件页数： | 13/29页 |
| 文件大小： | 547K |
| 代理商： | MAX15005BAUE |
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M
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
______________________________________________________________________________________
13
(t
DISCHARGE
). See Figures 3a and 3b for a coarse selec-
tion of capacitor values for a given switching frequency
and maximum duty cycle and then use the following
equations to calculate the resistor value to fine-tune the
switching frequency and verify the worst-case maximum
duty cycle.
where f
OSC
is the oscillator frequency, RT is a resistor
connected from RTCT to REG5, and CT is a capacitor
connected from RTCT to SGND. Verify that the oscilla-
tor frequency value meets the target. Above calcula-
tions could be repeated to fine-tune the switching
frequency.
The MAX15004A/B is a 50% maximum duty-cycle part,
while the MAX15005A/B is 100% maximum duty-cycle
part.
for the MAX15004A/B and
for the MAX15005A/B.
The MAX15004A/B/MAX15005A/B can be synchronized
using an external clock at the SYNC input. For proper
frequency synchronization, SYNC’s input frequency must
be at least 102% of the programmed internal oscillator
frequency. Connect SYNC to SGND when not using an
external clock. A rising clock edge on SYNC is interpret-
ed as a synchronization input. If the SYNC signal is lost,
the internal oscillator takes control of the switching rate,
returning the switching frequency to that set by RC net-
work connected to RTCT. This maintains output regula-
tion even with intermittent SYNC signals.
f
f
OUT
OSC
=
f
f
OUT
OSC
=
1
2
t
D
f
RT
t
CT
V
A
( )
t
RT
RT
×
CT
3 375
.
V
f
t
t
Use This EquationIff
kHz
t
t
ns
Use This EquationIff
.......
kHz
CHARGE
MAX
OSC
CHARGE
×
0 7
2 25
3
DISCHARGE
OSC
CHARGE
DISCHARGE
1
OSC
CHARGE
DISCHARGE
OSC
=
=
=
×
×
)
=
+
≤
+
+
>
1 33 10
( .
1
500
160
500
.
.
( )
( )
...................
Figure 2: Timing Diagram for Internal Oscillator vs. External SYNC and DMAXBehavior
RTCT
CLKINT
SYNC
OUT
RTCT
CLKINT
SYNC
OUT
D = 50%
D = 50%
D = 81.25%
D = 80%
WITH SYNC
INPUT
MAX15004A/B (D
MAX
= 50%)
MAX15005A/B (D
MAX
= 81%)
WITHOUT
SYNC INPUT
WITH SYNC
INPUT
WITHOUT
SYNC INPUT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15005BAUE/V+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15005BAUE/V+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15005BAUE+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15005BAUE+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15006AASA/V+ | 制造商:Maxim Integrated Products 功能描述:40V, ULTRA-LOW QUIESCENT-CURRENT LINEAR REGULATORS IN 6-PIN - Rail/Tube |
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