|
| |
|
|
|
| |
|
|
| |
|
|
SMSC
has been offering thermal management solutions to the marketplace to provide devices
that answer system needs for both fan control and temperature measurement. SMSC
is constantly seeking to introduce and employ the latest industry concepts, such
as resistance error correction and high frequency fan drive, to lower acoustic
noise and save engineering time.
|
| • |
SMSC temperature
sensors employ highly accurate measurement techniques allowing for 1°C accuracy. |
| • |
Several special
functions, such as resistance error correction and ideality configuration, minimize
measurement errors. This reduces engineering time normally spent on calibration
and characterization. |
| • |
Each sensor is well differentiated in its class by extra features such as anti-parallel
diodes and three sensors in a two-sensor package. |
| |
|
|
|
 Resistance
Error Correction – This automatically corrects for series resistance effects
that can occur for trace resistance or substrate resistance. Without correction,
four inches of trace metal will often add 0.6°C error to a temperature measurement.
The result of this technology is a reduction of engineering time on new board
layouts.
Anti-Parallel
Diodes – A first-to-market feature, this unique configuration allows two
remote temperature monitors to occupy two pins. The EMC1033 extends the common
dual sensor footprint to three temperature monitors.
Ideality
Configuration – A first-to-market feature, this compensates for the common
error effect present in substrate diodes and discrete transistors. Without this
configuration, the ideality effect can create a spreading error over temperatures.
Ideality configuration improves BOM flexibility while maintaining accuracy.
|
| • |
SMSC’s thermal management solutions are found in four of the top-five PC
vendors worldwide. |
 |
| • |
SMSC’s fan control ICs provide additional reliability to a system’s
thermal management by lifting the need for constant supervision off of the microprocessor.
Once configured, alerts bring only those events requiring action to the attention
of the host processor. |
| • |
Lower acoustic noise can be attained with an SMSC fan control IC. Fan spin up, restriction and over sudden changes in fan speed and tracking fan speed to temperature can all be done without heavy software overhead, development or constant processing. This reduces time, prototype validation time and time to market. |
| • |
Fan controllers shorten development time compared to microcontroller software solutions. Real-time fan control from a microcontroller is not easily programmed and presents longer development cycles. |
| |
|
|
 High-Frequency
PWM – SMSC fan control employs lower frequency and higher frequency (>18kHz)
fan drive signals. Above 18kHz is compatible with four wire fans and is above
what a human ear can detect as switching noise.
Fan
Speed Ramp Rate Control – This limits quick changes in fan speed. Large,
sudden increases in fan speed are more easily detected as audible noise.
Multi-Temperature Control
– One fan can be controlled by up to three temperature relationships. |
| |
|
| |
|
|
Part
Number |
EMC1001 |
EMC1002 |
EMC1023 |
EMC1033 |
EMC1043 |
EMC1053 |
Package |
6-pin
SOT |
8-pin
MSOP
8-pin
SOIC |
8-pin
MSOP |
8-pin
MSOP
8-pin
SOIC |
8-pin
MSOP |
8-pin
MSOP |
Operating
Temperature |
-20
-
125°C |
-40
- 125°C |
0
- 80°C |
-40
-
125°C |
0
- 85°C |
0
- 85°C |
Power
Supply |
3.3V
5V Tolerant |
3.3V
5V Tolerant |
3.3V
5V Tolerant |
3.3V
5V Tolerant |
3.3V
5V Tolerant |
3.3V
5V Tolerant |
SMBus
2.0 Support |
• |
• |
• |
• |
• |
• |
Remote
Temperature Monitors |
- |
1 |
2 |
2 |
2 |
2 |
Temperature
Accuracy |
+/-
1.5°C |
+/-
1°C |
+/-
1°C |
+/-
1°C |
+/-
1°C |
+/-
1°C |
Ambient
Temperature Monitor |
• |
• |
• |
• |
• |
• |
Temperature
Interrupt/SMBus
Alert |
2 |
2 |
|
2 |
|
|
Resistance
Error Correction |
- |
• |
• |
• |
• |
• |
Ideality
Configuration |
|
• |
• |
• |
• |
• |
Comments |
- |
- |
- |
Anti-Parallel
Diodes |
Beta
Compensation |
Hotter
of two Zones |
|
| |
|
|
| |
|
|
| |
|
|
Part
Number |
EMC2300
*New |
EMC6D103S |
Package |
16-pin
SSOP |
24-pin
SSOP |
Operating
Temperature |
0
- 70°C |
0
- 70°C |
Power
Supply |
3.3V,
5V Tolerant |
3.3V,
5V Tolerant |
SMBus
2.0 Support |
• |
• |
PWM
Outputs |
3 |
3 |
Hi-Speed
PWM Support |
• |
• |
Fan
Tach Inputs |
4 |
4 |
Remote
Temperature Monitors |
2 |
2 |
Temperature
Accuracy |
+/-
3°C |
+/-
3°C |
Ambient
Temperature Monitor |
• |
• |
Temperature
Interrupt |
• |
• |
Voltage
Monitors |
Vccp |
Vcc,
Vccp, 2.5, 5, 12 |
Voltage
Interrupt |
• |
• |
Voltage
ID Pins |
- |
5 |
|
| |
|
|
| |
|
|
|
| TEMPERATURE
SENSOR |
• |
SMSC
has the smallest package for three sensors |
• |
Highly
accurate 1°C temperature sensors |
• |
Only
SOT (small footprint) sensor with a SMBus alert and critical shutdown pin (EMC1001) |
• |
Resistance
error correction cuts engineering time associated with characterization |
• |
Ideality
configuration improves BOM flexibility while maintaining accuracy |
• |
Anti-parallel
diode configuration extends a common dual sensor footprint to three temperature
monitors (EMC1033) |
• |
SMBus
sensor ease difficulties with routing and analog signal in a noisy environment |
• |
SMBus
sensors can work on an I²C bus |
| |
|
| FAN
CONTROL |
• |
Minimizes
noise associated with quick fan speed changes |
• |
Fan
PWM drive signal frequencies are above human hearing |
• |
Four-wire
fan compatible |
• |
One
fan controlled by up to three temperature inputs |
|
|
| Target
applications include: |
• |
Rear-Projection
TVs |
• |
LCD
TVs |
• |
Plasma
TVs |
• |
Power
Meter |
• |
Power
Supplies |
• |
Network
Switches |
• |
Routers |
• |
Copiers |
• |
Fax
Machines |
• |
Printers |
• |
Mobile
Phones |
• |
Li
Ion Batteries |
• |
Test
and Measurement |
• |
Cellular
Base Stations |
• |
Graphics
Cards |
• |
Gaming |
• |
LCD-Projectors |
• |
Set
Top Boxes |
• |
Refrigerators |
• |
Thermostats |
• |
Air
Conditioners |
|
|
| |
|
|
