EMC2113 datasheet(14/85 Pages) SMSC

14 / 85 page

RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

Datasheet

Revision 1.2 (10-08-09)

SMSC EMC2113

DATASHEET

4.1

Electrical Specifications

Table 4.2 Electrical Specifications

VDD = 3V to 3.6V, TA = -40°C to 125°C, all Typical values at TA = 27°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

DC Power

Supply Voltage

VDD

33.3

3.6

Supply Current

IDD

1.1

1.5

4 Conversions/second, Fan

Driver active at maximum PWM

frequency, Dynamic Averaging

Enabled

0.7

1.1

1 Conversion/second, Fan

Driver not active, Dynamic

Averaging Disabled

First Conversion

Ready

tCONV_T

150

300

Time after power up before all

channels updated

SMBus Delay

tSMB_D

Time before SMBus

communications should be sent

by host

External Temperature Monitors

Temperature

Accuracy

±0.5

±1

°C

60°C < TDIODE < 125°C

30°C < TA < 100°C

±1

±2

°C

-40°C < TDIODE < 125°C

Temperature

Resolution

0.125

°C

Diode decoupling

capacitor

CFILTER

2200

2700

Connected across external

diode, CPU, GPU, or AMD diode

Resistance Error

Corrected

RSERIES

100

Ohm

Sum of series resistance in both

DP and DN lines

Internal Temperature Monitor

Temperature

Accuracy

±0.5

±1

°C

40°C < TA < 100°C

±1

±2

°C

Temperature

Resolution

0.125

°C

RPM-Based Fan Controller

Tachometer Range

TACH

480

16000

RPM

RPM Control

Accuracy

TACH

±1

±2

PWM Fan Driver

PWM Resolution

PWM

256

Steps

PWM Duty Cycle

DUTY

100

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