参数资料
| 型号： | MAX17498AATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/20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) |
MAX17498A/MAX17498B/MAX17498C
AC-DC and DC-DC Peak Current-Mode Converters
for Flyback/Boost Applications
Configuring the Power Stage (LX)
The devices use an internal n-channel MOSFET to imple-
ment internal current sensing for current-mode control and
overcurrent protection of the flyback/boost converter. To
facilitate this, the drain of the internal nMOSFET is connect-
ed to the source of the external MOSFET in the MAX17498A
high-input-voltage applications. The gate of the external
MOSFET is connected to the IN pin. Ensure by design that
the IN pin voltage does not exceed the maximum operating
gate-voltage rating of the external MOSFET. The external
MOSFET gate-source voltage is controlled by the switch-
ing action of the internal nMOSFET, while also sensing the
source current of the external MOSFET. In the MAX17498B/
MAX17498C-based applications, the LX pin is directly con-
nected to either the flyback transformer primary winding or
to the boost-converter inductor.
IN
10μA
Maximum Duty Cycle
The MAX17498A/MAX17498C operate at a maximum
duty cycle of 94%. The MAX17498B offers a maximum
duty cycle of 92%. The devices can be used to imple-
ment flyback and boost converters involving large input-
to-output voltage ratios in DC-DC applications.
Power-Good Signal (PGOOD)
The devices include a PGOOD signal that serves as
a power-good signal to the system. PGOOD is an
open-drain signal and requires a pullup resistor to the
preferred supply voltage. The PGOOD signal monitors
EA- and pulls high when EA- is 95% (typ) of its regulation
value (1.22V). For isolated power supplies, PGOOD can-
not serve as a power-good signal.
REF
SSDONE
SSDONE
VOLTAGE SS
CHIPEN
HICCUP
SS
V CC
5V, 50mA
POK
LDO
33V CLAMP
(MAX17498A ONLY)
BG
SS
CURRENT SS
MAX17498A
MAX17498B
MAX17498C
1.17V
SSDONEF
EN/UVLO
OVI
1.23V
1.23V
V CS
CHIPEN
OSC
RUNAWAY
CLK
V SLOPE
V SUM
1 RUNAWAY
V CS
SSDONE
LX
LIM
10μA
1.23V
LIMINT
V SUM
PEAK
PWM
CONTROL
LOGIC AND
DRIVER
PGOOD
PGND
PGOOD
SLOPE
10μA
250mV
DECODER
COMP
FIXED SLOPE
VARIABLE SLOPE
EA-
BLOCK
COMP
EA+
EA-
VOLTAGE SS CURRENT SS
Figure 1. MAX17498A/MAX17498B/MAX17498C Block Diagram
Maxim Integrated
CHIPEN
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17498BATE+ | 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 |
| MAX17498BATE+CER | 功能描述:直流/直流开关转换器 ACDC & DCDC Peak Crnt-Mode Cnvtrs RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX17498BATE+T | 功能描述:电流型 PWM 控制器 MAX17498BATE+T 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 |
| MAX17498BATE+TCER | 功能描述:直流/直流开关转换器 Universal ACDC & Iso DCDC Flyback cntlr RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX17498BEVKIT# | 功能描述:电源管理IC开发工具 MAX17498 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 |
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