3) Route the DXP and DXN traces parallel and close to
each other, away from any high-voltage traces such
as +12VDC. Avoid leakage currents from PCB cont-
amination. A 20M?leakage path from DXP ground
causes approximately +1癈 error.
4) Connect guard traces to GND on either side of the
DXP/DXN traces. With guard traces, placing routing
near high-voltage traces is no longer an issue.
5) Route as few vias and crossunders as possible to
minimize copper/solder thermocouple effects.
6) When introducing a thermocouple, make sure that
both the DXP and the DXN paths have matching
thermocouples. In general, PCB-induced thermo-
couples are not a serious problem. A copper solder
thermocouple exhibits 3礦/癈, and it takes approxi-
mately 200礦 of voltage error at DXP/DXN to cause
a +1癈 measurement error, so most parasitic ther-
mocouple errors are swamped out.
7) Use wide traces. Narrow traces are more inductive
and tend to pick up radiated noise. The 10-mil widths
and spacings recommended are not absolutely nec-
essary (as they offer only a minor improvement in
leakage and noise), but use them where practical.
8) Placing an electrically clean copper ground plane
between the DXP/DXN traces and traces carrying
high-frequency noise signals helps reduce EMI.
2-Channel Temperature Monitor with Dual,
Automatic, PWM Fan-Speed Controller
20
Maxim Integrated
MAX6639/MAX6639F
MAX6639
V
FAN
(5V OR 12V)
SDA
SCL
PWM2
DXP1
DXN
TO CLOCK THROTTLE
TO SYSTEM SHUTDOWN
TO SMBus
MASTER
3.3V TO 5.5V
3.0V TO 3.6V
3.3V TO 5.5V
3.3V TO 5.5V
3.3V TO 5.5V
3.3V TO 5.5V
PWM1
5V
5V
DXP2
GPU
V
CC
CPU
GND
5V
TACH1
ADD
TACH2
ALERT
THERM
FANFAIL
V
FAN
(5V OR 12V)
OT
Typical Operating Circuit
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
MAX6641AUB92+
IC TEMP MONITOR SMBUS 10UMAX
MAX6642ATT94+T
IC TEMP SENSOR SMBUS 6TDFN
MAX6643LBFAEE+
IC CTLR PWM FAN-SPEED 16QSOP
MAX6649MUA/V+
IC SENSOR REMOTE SMBUS 8UMAX
MAX6652AUB+T
IC TEMP SENS/MON 10-UMAX
MAX6659MEE+T
IC TEMP SENSOR SMBUS 16-QSOP
MAX6661AEE+T
IC REG FAN SPEED 16-QSOP
MAX6664AEE+T
IC TEMP MON FAN CNTRL 16-QSOP
相关代理商/技术参数
MAX6639FATE+T
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MAX6639YAEE+
功能描述:板上安装温度传感器 2Ch Temperature Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6639YAEE+T
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MAX663C/D
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MAX663CJA
功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MAX663CPA
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MAX663CPA+
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MAX663CSA
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