Datasheet > HT7463B

HT7463B

更新时间： 2024-11-11 14:58:39

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
16页	1487K
描述
52V/600mA, 1.25MHz/550kHz Asynchronous Step Down Converter

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HT7463B 数据手册

HT7463A/HT7463B

52V/600mA, 1.25MHz/550kHz

Asynchronous Step Down Converter

Features

General Description

• Wide Input Voltage Range 4.5V to 52V

• 52V / 0.9Ω Internal Power MOSFET

• 600mA Peak Output Current

• Up to 90% Efﬁciency

The HT7463A/B is a current mode buck converter.

With a wide input range from 4.5V to 52V,

the HT7463A/B is suitable for a wide range of

applications such as power conditioning from

unregulated sources. Having a low internal switch

typical RDSON value of 0.9Ω, the device has a good

operating typical efficiency value of 85% and the

added advantage of reduced junction temperature.

The operating frequency is ﬁxed at 1250/550kHz for

the HT7463A/HT7463B respectively. The HT7463A

allows the use of small external components while

still being able to have low output voltage ripple.

A soft-start function can be implemented using the

enable pin and by connecting an external RC circuit

allowing the user to tailor the soft-start time to a

speciﬁc application.

• 1.25MHz (HT7463A) and 550kHz (HT7463B)

Fixed Operating Frequency

• Ultra Low Shutdown Current < 1

• Output Short Circuit Protection

• Thermal Shutdown Protection

• Package Type: 6-pin SOT23

µA

Applications

• Power Meters

• Distribution Power Systems

• Battery Chargers

• Pre-Regulator for Linear Regulators

Application Circuit

C_B

0.1µF

22µH/47µH *³

V_OUT=12V *¹

0.1µF

HT7463A/B

22µF *²

V_IN

GND

VIN

On/Off

Control

0.1µF

100µF

84kΩ / ±1%

6kΩ / ±1%

Note: *1. C4=330μF is recommended to achieve 1‰ output ripple requirement

*2. Set R1=84kΩ and R2=16kΩ for V_OUT=5V application

*3. It’s recommended that L1=22μH for HT7463A and L1=47μH for HT7463B

Rev. 1.30

August 20, 2018

12 3 4 5 6 7...16

中文翻译

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