- 您现在的位置：买卖IC网 > PDF目录17284 > MAX15005AEVKIT+ (Maxim Integrated Products)KIT EVAL FOR MAX15005A PDF资料下载
参数资料
| 型号： | MAX15005AEVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/27页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX15005A |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升/步降 |
| 输出及类型： | 3，隔离 |
| 输出电压： | 3V，110V，60V |
| 电流 - 输出： | 650mA，55mA，12mA |
| 输入电压： | 6.5 ~ 16 V |
| 稳压器拓扑结构： | 回扫 |
| 频率 - 开关： | 100kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15005A |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
MAX15004A/B/MAX15005A/B
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
When the voltage produced by this current (through the
current-sense resistor) exceeds the current-limit com-
parator threshold, the MOSFET driver (OUT) quickly ter-
minates the on-cycle. In most cases, a short-time
constant RC filter is required to filter out the leading-
edge spike on the sense waveform. The amplitude and
width of the leading edge depends on the gate capaci-
tance, drain capacitance (including interwinding capac-
itance), and switching speed (MOSFET turn-on time).
Set the RC time constant just long enough to suppress
the leading edge. For a given design, measure the lead-
ing spike at the highest input and rated output load to
determine the value of the RC filter.
The low 305mV current-limit threshold reduces the
power dissipation in the current-sense resistor. The cur-
rent-limit threshold can be further reduced by adding
an offset to the CS input from REG5 voltage. Do not
reduce the current-limit threshold below 150mV as it
may cause noise issues. See Figure 4. For a new value
of the current-limit threshold (V CS-LOW ), calculate the
value of R1 using the following equation.
Applications Information
Boost Converter
The MAX15004A/B/MAX15005A/B can be configured
for step-up conversion. The boost converter output can
be fed back to V CC (see Figure 5) so that the controller
can function even during cold-crank input voltage
( ≤ 2.5V). Use a Schottky diode (D VIN ) in the V IN path to
avoid backfeeding the input source. A current-limiting
resistor (R VCC ) is also needed from the boost converter
output to V CC depending upon the boost converter out-
put voltage. The total current sink into V CC must be lim-
ited to 30mA. Use the equations in the following
sections to calculate R VCC , inductor (L MIN ), input
capacitor (C IN ), and output capacitor (C OUT ) when
using the converter in boost operation.
Inductor Selection in Boost Configuration
Using the following equation, calculate the minimum
inductor value so that the converter remains in continu-
ous mode operation at minimum output current (I OMIN ).
R 1 =
4 . 75 × R CS
0 . 290 ? V CS ? Low
L MIN =
V IN 2 × D × η
2 × f OUT × V OUT × I OMIN
where:
V IN
and
D =
V OUT + V D ? V IN
V OUT + V D ? V DS
MAX15004A/B
REG5
I OMIN = (0.1 × I O ) to (0.25 × I O )
MAX15005A/B
0.3V
CURRENT-LIMIT
COMPARATOR
R1
C CS
R CS
N
R S
The higher value of I OMIN reduces the required induc-
tance; however, it increases the peak and RMS currents
in the switching MOSFET and inductor. Use I OMIN from
10% to 25% of the full load current. The V D is the for-
ward voltage drop of the external Schottky diode, D is
the duty cycle, and V DS is the voltage drop across the
external switch. Select the inductor with low DC resis-
tance and with a saturation current (I SAT ) rating higher
than the peak switch current limit of the converter.
Figure 4. Reducing Current-Sense Threshold
Maxim Integrated
15
相关PDF资料 |
PDF描述 |
|---|---|
| F910G687KNC | CAP TANT 680UF 4V 10% 2917 |
| ECM08DTMD | CONN EDGECARD 16POS R/A .156 SLD |
| GBM12DRSI | CONN EDGECARD 24POS DIP .156 SLD |
| 050R26-51B | CABLE FLAT FLEX 26POS 0.5MM 2" |
| F910G477KNC | CAP TANT 470UF 4V 10% 2917 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15005AEVKIT+ | 功能描述:电源管理IC开发工具 MAX15005A Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| 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 |
发布紧急采购，3分钟左右您将得到回复。