Datasheet > MAX17498C

MAX17498C

更新时间： 2024-11-15 14:57:35

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
20页	1439K
描述
AC-DC和DC-DC峰值电流模式转换器，支持反激/Boost应用

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中文翻译

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MAX17498C 数据手册

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MAX17498A/

MAX17498B/

MAX17498C

AC-DC and DC-DC Peak Current-Mode Converters

for Flyback/Boost Applications

General Description

Beneﬁts and Features

● Peak Current-Mode Converter

The MAX17498A/MAX17498B/MAX17498C devices are

current-mode fixed-frequency flyback/boost converters

with a minimum number of external components. They

contain all the control circuitry required to design wide

input voltage isolated and nonisolated power supplies.

The MAX17498A has its rising/falling undervoltage lock-

out (UVLO) thresholds optimized for universal offline (85V

AC to 265V AC) applications, while the MAX17498B/

MAX17498C support UVLO thresholds suitable to low-

voltage DC-DC applications.

● Current-Mode Control Provides Excellent Transient

Response

● Fixed Switching Frequency

• 250kHz: MAX17498A/MAX17498C

• 500kHz: MAX17498B

● Flexible Error Amplifier to Regulate Both Positive and

Negative Outputs

● Programmable Voltage or Current Soft-Start

● Power-Good Signal (PGOOD)

The switching frequency of the MAX17498A/MAX17498C

is 250kHz, while that of the MAX17498B is 500kHz. These

frequencies allow the use of tiny magnetic and filter com-

ponents, resulting in compact, cost-effective power sup-

plies. An EN/UVLO input allows the user to start the power

supply precisely at the desired input voltage, while also

functioning as an on/off pin. The OVI pin enables imple-

mentation of an input overvoltage-protection scheme that

ensures that the converter shuts down when the DC input

voltage exceeds the desired maximum value.

● Reduced Power Dissipation Under Fault

• Overcurrent Protection

• Thermal Shutdown with Hysteresis

● Robust Protection Features

• Programmable Current Limit

• Input Overvoltage Protection

● Optimized Loop Performance

The devices incorporate a flexible error amplifier and

an accurate reference voltage (REF) to enable the end

user to regulate both positive and negative outputs.

Programmable current limit allows proper sizing and pro-

tection of the primary switching FET. The devices support

a maximum duty cycle greater than 92% and provide

programmable slope compensation to allow optimization

of control loop performance. The devices provide an

open-drain PGOOD pin that serves as a power-good

indicator and enters the high-impedance state to indi-

cate that the flyback/boost converter is in regulation.

An SS pin allows programmable soft-start time for the

flyback/boost converter. Hiccup-mode overcurrent pro-

tection and thermal shutdown are provided to minimize

dissipation under overcurrent and overtemperature fault

conditions. The devices are available in a space-saving,

16-pin (3mm x 3mm) TQFN package with 0.5mm lead

spacing.

• Fixed Default Slope Compensation in Current

Soft-Start

• Fixed Default and Programmable Slope Compen-

sation in Voltage Soft-Start

● High Efficiency

• Low R

, 175mΩ, 65V Rated Internal n-Chan-

DSON

nel MOSFET

• No Current-Sense Resistor

● Optional Spread Spectrum

● Space-Saving, 16-Pin (3mm x 3mm) TQFN Package

Applications

● Front-End AC-DC Power Supplies for Industrial

Applications (Isolated and Nonisolated)

● Telecom Power Supplies

● Wide Input Range DC Input Flyback/Boost Industrial

Power Supplies

Ordering Information and Typical Application Circuits

appear at end of data sheet.

19-6043; Rev 4; 10/20

12 3 4 5 6 7...20

中文翻译

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与MAX17498C相关器件

型号	品牌	获取价格	描述	数据表
MAX17498CATE	MAXIM	获取价格	AC-DC and DC-DC Peak Current-Mode Converters for Flyback/Boost Applicatio
MAX17499	MAXIM	获取价格	Current-Mode PWM Controllers with Programmable Switching Frequency
MAX17499	ADI	获取价格	电流模式PWM控制器，可调节开关频率
MAX17499/MAX17500	MAXIM	获取价格	电流模式PWM控制器，可调节开关频率
MAX17499AAUB+	MAXIM	获取价格	Current-Mode PWM Controllers with Programmable Switching Frequency
MAX17499AEUB+	ROCHESTER	获取价格	SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10, ROHS COMPLIANT, UMAX-10
MAX17499BAUB+	MAXIM	获取价格	Current-Mode PWM Controllers with Programmable Switching Frequency
MAX17499BAUB+T	MAXIM	获取价格	Switching Controller,
MAX17499BEUB+	ROCHESTER	获取价格	SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10, ROHS COMPLIANT, UMAX-10
MAX1749EUK(BULKFORM)	MAXIM	获取价格	Brush DC Motor Controller

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