Datasheet > HM1460

HM1460

更新时间： 2024-11-10 01:11:59

品牌	Logo	应用领域
华之美 - HMSEMI		/
页数	文件大小	规格书
19页	1227K
描述
Single Buck Voltage Mode PWM Controller

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HM1460 数据手册

Single Buck Voltage Mode PWM Controller

HM1460

General Description

Features

The HM1460 is a voltage mode, fixed 300kHz switching



Wide 5V to 12V Supply Voltage

frequency, synchronous buck converter. The HM1640 allows  Power-On-Reset Monitoring on VCC

wide input voltage that is either a single 5~12V or two supply

voltage(s) for various applications. A power-on-reset (POR)

circuit monitors the VCC supply voltage to prevent wrong

logic controls. A builtin soft-start circuit prevents the output

voltages from overshoot as well as limits the input current.

An internal 0.8V temperature-compensated reference

voltage with high accuracy is designed to meet the



Excellent Output Voltage Regulations 0.8V Internal

Reference ±1% Over-Temperature Range

Integrated Soft-Start



Voltage Mode PWM Operation with External

Compensation



Up to 90% Duty Ratio for Fast Transient Response

Constant Switching Frequency 300kHz ±10%

requirement of low output voltage applications. The HM1640  Drive Dual Low Cost N-MOSFETs with Adaptive

provides excellent output voltage regulations against load

current

Dead-Time Control



50% Under-Voltage Protection

variation.

125% Over-Voltage Protection

The controller’s over-current protection monitors the output

current by using the voltage drop across the RDS(ON) of

low-side MOSFET, eliminating the need for a current sensing

resistor that features high efficiency and low cost. In addition,

the HM1460 also integrates excellent protection functions:

The over-voltage protection (OVP) , under- voltage protection

(UVP). OVP circuit which monitors the FB voltage to prevent

the PWM output from overvoltage,and UVP circuit which

monitors the FB voltage to prevent the PWM output from

under-voltage or short-circuit.The HM1640 is available in

SOP-8P and TDFN3x3-10 packages.

Adjustable Over-Current Protection Threshold Using the

RDS(ON) of Low-Side MOSFET



Shutdown Control by COMP

Power Good Monitoring (TDFN-10 3mmx3mm Package

Only)



SOP-8P and TDFN3x3-10 Packages

Lead Free and Green Devices Available (RoHS Compliant)

Applications



Graphic Cards

DSL, Switch HUB

Wireless Lan

Notebook Computer

Mother Board

LCD Monitor/TV

12 3 4 5 6 7...19

中文翻译

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与HM1460相关器件

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