参数资料
| 型号： | MAX17497AATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/30页 |
| 文件大小： | 0K |
| 描述： | IC OFF-LINE CONVERTER 16TQFN |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 输出隔离： | 隔离 |
| 频率范围： | 235kHz ~ 265kHz |
| 输入电压： | 4.5 V ~ 29 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
| 包装： | 带卷 (TR) |
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MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
EN/UVLO
95%
6.5V
V OUTF
t SSF
95%
92%
V OUTB
RESETN
t SSB
4ms
t RESETN
Figure 2. Sequencing of MAX17497A/MAX17497B Output Voltage Rails
? V OVI
? V START
R SUM = ? ? R OVI EN ? ? × ? ? k ?
? V START ?
Spread-Spectrum Factory Option
For EMI-sensitive applications, a spread-spectrum-
enabled version of the device can be requested from
the factory. The frequency-dithering feature modulates
the switching frequency by Q 10% at a rate of 1/16 the
switching frequency. This spread-spectrum-modulation
technique spreads the energy of switching-frequency
harmonics over a wider band while reducing their peaks,
helping to meet stringent EMI goals.
Applications Information
Startup Voltage and Input Overvoltage-
Protection Setting (EN/UVLO, OVI)
The devices’ EN/UVLO pin serves as an enable/disable
input, as well as an accurate programmable input UVLO
pin. The devices do not commence startup operations
unless the EN/UVLO pin voltage exceeds 1.23V (typ).
The devices turn off if the EN/UVLO pin voltage falls
below 1.17V (typ). A resistor-divider from the input DC
bus to ground can be used to divide down and apply a
fraction of the input DC voltage (V DC ) to the EN/UVLO
pin. The values of the resistor-divider can be selected
additional resistor (R OVI ) to implement input overvoltage
protection in addition to the EN/UVLO functionality, as
shown in Figure 3 . When voltage at the OVI pin exceeds
1.23V (typ), the devices stop switching and resume
switching operations only if voltage at the OVI pin falls
below 1.17V (typ). For given values of startup DC input
voltage (V START ), and input overvoltage-protection volt-
age (V OVI ), the resistor values for the divider can be cal-
culated as follows, assuming a 24.9k I resistor for R OVI :
?
R EN = R OVI × ? ? 1 ? k ?
?
where R OVI is in k I and V START and V OVI are in volts.
+ R ? 1
? 1.23 ?
where R EN and R OVI are in k I and V START is in volts.
R SUM may need to be implemented as equal multiple resistors
in series ( R DC1, R DC2, R DC3) such that voltage across each
resistor is limited to its maximum operating voltage.
R = R = R =
such that the EN/UVLO pin voltage exceeds the 1.23V
(typ) turn-on threshold at the desired input DC bus volt-
age. The same resistor-divider can be modified with an
Maxim Integrated
DC1 DC2 DC3
R SUM
3
k ?
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17497AEVKIT# | 功能描述:电源管理IC开发工具 MAX17497 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 |
| MAX17497BATE+ | 功能描述:电流型 PWM 控制器 Univ AC/DC-Iso DC/DC Flyback controller 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 |
| MAX17497BATE+T | 功能描述:电流型 PWM 控制器 Univ AC/DC-Iso DC/DC Flyback controller 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 |
| MAX17498AATE+ | 功能描述:电流型 PWM 控制器 Uvrsl AC/DC & Iso DC/DC Flyback 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 |
| MAX17498AATE+T | 功能描述:电流型 PWM 控制器 Uvrsl AC/DC & Iso DC/DC Flyback 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 |
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