Datasheet > LM96000

LM96000

更新时间： 2024-11-23 22:47:03

品牌	Logo	应用领域
美国国家半导体 - NSC		风扇监控
页数	文件大小	规格书
28页	691K
描述
Hardware Monitor with Integrated Fan Control

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数据手册

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LM96000 数据手册

November 2004

LM96000

Hardware Monitor with Integrated Fan Control

n Noise filtering of temperature reading for fan control

n 1.0˚C digital temperature sensor resolution

General Description

The LM96000, hardware monitor, has a two wire digital

interface compatible with SMBus 2.0. Using an 8-bit Σ∆

ADC, the LM96000 measures:

n 3 PWM fan speed control outputs

n Provides high and low PWM frequency ranges

n 4 fan tachometer inputs

n Monitors 5 VID control lines

n 24-pin TSSOP package

– the temperature of two remote diode connected transis-

tors as well as its own die

– the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V supplies (in-

ternal scaling resistors).

n XOR-tree test mode

To set fan speed, the LM96000 has three PWM outputs that

are each controlled by one of three temperature zones. High

and low PWM frequency ranges are supported. The

LM96000 includes a digital filter that can be invoked to

smooth temperature readings for better control of fan speed.

The LM96000 has four tachometer inputs to measure fan

speed. Limit and status registers for all measured values are

included.

Key Specifications

n Voltage Measurement Accuracy

n Resolution

2% FS (max)

8-bits, 1˚C

3˚C (max)

n Temperature Sensor Accuracy

n Temperature Range

— LM96000 Operational

— Remote Temp Accuracy

n Power Supply Voltage

n Power Supply Current

0˚C to +85˚C

0˚C to +125˚C

+3.0V to +3.6V

0.53 mA

Features

n 2-wire, SMBus 2.0 compliant, serial digital interface

n 8-bit Σ∆ ADC

Applications

n Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V

motherboard/processor supplies

n Monitors 2 remote thermal diodes

n Programmable autonomous fan control based on

temperature readings

n Desktop PC

n Microprocessor based equipment

(e.g. Base-stations, Routers, ATMs, Point of Sales)

Block Diagram

20084601

DS200846

www.national.com

12 3 4 5 6 7...28

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与LM96000相关器件

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