Digital temperature monitors MAX6622 in temperature and control application (1)

1 Introduction

With the advent of the computer, more and more features being integrated into the computer.

Therefore, increasing the capacity of the computer. In order to meet the needs of a large number of data processing, growing number of chipset is integrated into the host, the CPU and chipset for the operating frequency is also increasing.

More chipsets and faster clock frequency will produce more heat.

In the limited space within the PCT system heat dissipation is a tricky problem. How to combine the comfort system efficiency, System (including the computer casing temperature, fan rotation noise), and system uptime, is computer design of an important issue, therefore, this article proposes a temperature measurement and control based on MAX6622 of application design.

2 MAX6622 introduction

MAX6622 is MAXIM company introduced a precision multichannel temperature monitor, internal integration with A/D converter, registers, interface circuit, can be directly output digital signals.

The device has a high accuracy, response speed, small size, low power consumption, software interface for easy control. Widely used in desktop computers, notebooks, servers, workstations, and other temperature monitoring system.

MAX6622 precision multichannel temperature sensor to monitor local temperature and 4-way remote temperature.

All temperature channel has the alarm threshold can be set. When the measured temperature exceeding the threshold crossing, the status register bit corresponds to the location of the State. Two-channel open drain output ALERT and OVERT, according to the State registers the corresponding bits in the status is low. 2-wire serial interface using standard system management bus can perform write Byte, byte, send byte read and receive byte command, can also be used to read the temperature data and set the alarm threshold. MAX6622 temperature range is-40 ° c to + 125 ° c, 16-pin TSSOP Package.

2.1 main features

2.2 pin configuration and function description

MAX6622 pin configuration as shown in Figure 1, while the PIN function description as shown in table 1.

[1] [2] [3] [4]