Datasheet > HM1468

HM1468

更新时间： 2024-11-10 01:16:23

品牌	Logo	应用领域
华之美 - HMSEMI		/
页数	文件大小	规格书
16页	2190K
描述
High-Performance PWM Controller

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HM1468 数据手册

PWM Controller

HM1468

High-Performance

General Description

Features

The HM1468 is

single phase, constant on time,

Adjustable Output Voltage from +0.7V to +5.5V

synchronous PWM controller, which drives N‐channel

MOSFETs. The HM1468 steps down high voltage to

generate low‐voltage chipset or RAM supplies in notebook

computers.

0.7V Reference Voltage

±1% Accuracy Over‐Temperature

Operates from an Input Battery Voltage Range of +1.8V

to +32V

The HM1468 provides excellent transient response and

accurate DC voltage output in either PFM or PWM Mode. In

Power‐On‐Reset Monitoring on VCC Pin

Excellent Line and Load Transient Responses

Pulse Frequency Mode (PFM), the HM1468 provides very high z PFM Mode for Increased Light Load Efficiency

efficiency over light to heavy loads with loading‐ modulated

switching frequencies. In PWM Mode, the converter works

nearly at constant frequency for low‐noise requirements.

Selectable PWM Frequency from 4 Preset Values

Integrated MOSFET Drivers

Integrated Bootstrap Forward P‐CH MOSFET

The HM1468 is equipped with accurate positive current-limit, z Adjustable Integrated Soft‐Start and Soft‐Stop

output under‐voltage, and output over‐voltage

protections, perfect for NB applications. The Power‐On‐

Reset function monitors the voltage on VCC to prevent

Selectable Forced PWM or Automatic PFM/PWM Mode

Power Good Monitoring

70% Under‐Voltage Protection

wrong operation during power‐on. The HM1468 has a 1 ms z 125% Over‐Voltage Protection

digital soft‐start and built‐in an integrated output

discharge method for soft‐stop. An internal integrated

soft‐start ramps up the output voltage with programmable

slew rate to reduce the start‐up current. A soft‐stop function

actively discharges the output capacitors with controlled

reverse inductor current.

Adjustable Current‐Limit Protection

Using Sense Low‐Side MOSFET’s R^DS(ON)

Over‐Temperature Protection

Auto Rework from Protection Mode

TDFN‐10 3x3 Package

Lead Free and Green Devices Available (RoHS Compliant)

The HM1468 is available in 10 pin TDFN 3x3 package.

Applications

Notebook

Table PC

Hand‐Held Portable

AIO PC

LCD Monitor / TV

Battery Charger

ADSL Modem

Telecom / Networking Equipment

12 3 4 5 6 7...16

中文翻译

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