Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
Chapter 3 Electrical Specifications
Table 3.1 Absolute Maximum Ratings
Voltage on 5V tolerant pins
Voltage on VDD pin
-0.3 to 6.5
-0.3 to 4
V
V
Voltage on 2V tolerant pins
Voltage on any other pin to GND
-0.3 to 2.5
V
-0.3 to VDD + 0.3
1 up to TA = 85°C
40
V
Package Power Dissipation See Note 3.1
Junction to Ambient (θJA) See Note 3.2
Operating Ambient Temperature Range
Storage Temperature Range
W
°C/W
°C
°C
V
-40 to 85°C
-55 to 150
2000
ESD Rating, All Pins, HBM
Note: Stresses above those listed could cause permanent damage to the device. This is a stress
rating only and functional operation of the device at any other condition above those indicated
in the operation sections of this specification is not implied. When powering this device from
laboratory or system power supplies, it is important that the Absolute Maximum Ratings not be
exceeded or device failure can result. Some power supplies exhibit voltage spikes on their
outputs when the AC power is switched on or off. In addition, voltage transients on the AC
power line may appear on the DC output. If this possibility exists, it is suggested that a clamp
circuit be used.
Note 3.1 All voltages are relative to ground.
Note 3.2 The Package Power Dissipation specification assumes a recommended thermal via design
consisting of four 12mil vias connected to the ground plane with a 2x2mm thermal landing.
3.1
Electrical Specifications
Table 3.2 Electrical Specifications
VDD = 3V to 3.6V, VDD_5V = 4.5V to 5.5V, TA = -40°C to 85°C, all Typical values at TA = 27°C unless otherwise
noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
DC Power
Supply Voltage
VDD
IDD
3
3.3
2
3.6
3
V
Supply Current
(active)
mA
4 Conversions / second -
Dynamic Averaging Enabled
Fan Driver enabled at max PWM
frequency
Supply Current
IDD
500
750
uA
1 Conversions / second-
Dynamic Averaging disabled,
Fan Driver disabled.
Revision 1.74 (05-08-08)
SMSC EMC2104
DATA1S4HEET
SMSC [ SMSC CORPORATION ]
