Datasheet > HT7463C

HT7463C

更新时间： 2024-11-11 15:18:23

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
15页	922K
描述
60V/600mA, 1.25MHz/550kHz Asynchronous Step Down Converter

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HT7463C 数据手册

HT7463C/HT7463D

60V/600mA, 1.25MHz/550kHz

Asynchronous Step Down Converter

Features

General Description

• Wide Input Voltage Range 4.5V to 60V

• 60V / 0.9Ω Internal Power MOSFET

• 600mA Peak Output Current

• Up to 90% Eﬃciency

The HT7463C/D is a current mode buck converter.

With a wide input range from 4.5V to 60V,

the HT7463C/D is suitable for a wide range of

applications such as power conditioning from

unregulated sources. Having a low internal switch

typical R_DSONvalue 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 HT7463C/HT7463D respectively. The HT7463C

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 (HT7463C) and 550kHz (HT7463D)

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

L1 *³

V_OUT=12V *²

0.1µF

HT7463C/D

22µF *¹

VIN

V_IN

GND

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=6kΩ for V_OUT=12V application

3. Typically recommended that L1=22µH for HT7463C and L1=47µH for HT7463D. Electromagnetic interfer-

ence situation suggest L1=100µH or more

Rev. 1.00

September 05, 2022

12 3 4 5 6 7...15

中文翻译

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