TC649 Microchip, TC649 Datasheet - Page 3

• Manufacturer Part Number: TC649
• Description: PWM Fan Speed Controller
• Manufacturer: Microchip

1.0
Absolute Maximum Ratings*
Supply Voltage ......................................................... 6V
Input Voltage, Any Pin.... (GND – 0.3V) to (V
Package Thermal Resistance:
Specified Temperature Range ........... -40°C to +125°C
Storage Temperature Range.............. -65°C to +150°C
DC ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise specified, T
V
I
I
I
V
t
t
t
I
I
SENSE Input
V
FAULT Output
V
t
t
t
V
V
V
V
V
V
V
V
Pulse Width Modulator
F
Note 1: Ensured by design, not tested.
DD
DD(SHDN)
IN
R
F
SHDN
OL
OH
MP
START
DIAG
AS
OSC
DD
OUT
TH(SENSE)
OL
IN
C(MAX)
C(SPAN)
SHDN
REL
HYST
HAS
2002 Microchip Technology Inc.
Symbol
, V
PDIP (R
SOIC (R
MSOP (R
Output
AS
ELECTRICAL
CHARACTERISTICS
Inputs
Supply Voltage
Supply Current, Operating
Supply Current, Shutdown/
Auto-shutdown Mode
V
V
V
Pulse Width (On V
Mode
Sink Current at V
Source Current at V
SENSE Input threshold Voltage with
Respect to GND
Output Low Voltage
Missing Pulse Detector Timer
Start-up Timer
Diagnostic Timer
Voltage at V
V
Auto-shutdown Threshold
Voltage applied to V
Reset/Shutdown
Voltage applied to V
Reset Mode
Hysteresis on V
Hysteresis on Auto-shutdown
Comparator
PWM Frequency
JA
IN
OUT
OUT
C(MAX)
JA
JA
, V
) ............................................ 125°C/W
) ............................................ 155°C/W
) .......................................... 200°C/W
AS
Rise Time
Fall Time
- V
Input Leakage
C(MIN)
IN
Parameter
for 100% Duty Cycle
SHDN,
OUT
IN
OUT
IN
IN
) to Clear Fault
Output
to Release
to Release
V
REL
Output
DD
V
C(MAX) -
+0.3V)
V
DD
MIN
Min
-1.0
3.0
1.0
5.0
2.5
1.3
—
—
—
—
30
50
—
—
—
—
—
—
—
26
V
x 0.19
C(SPAN)
T
A
T
MAX
*Stresses above those listed under "Absolute Maximum Rat-
ings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at
these or any other conditions above those indicated in the
operation sections of the specifications is not implied. Expo-
sure to absolute maximum rating conditions for extended peri-
ods may affect device reliability.
0.01 x V
, V
32/F
32/F
2.65
Typ
0.5
3/F
1.4
—
25
—
—
—
—
—
—
70
—
—
—
—
70
30
DD
= 3.0V to 5.5V.
DD
V
V
DD
C(MAX)
+1.0
Max
0.3
5.5
1.0
90
2.8
1.5
—
—
—
—
—
—
50
50
34
—
—
—
—
x 0.13
Units
µsec I
µsec I
µsec V
Sec
Sec
Sec
mA
mA
mA
mV
mV
µA
µA
Hz
V
V
V
V
V
V
V
V
Pins 6, 7 Open,
C
Pins 6, 7 Open; Note 1
C
Specifications, Note 1
V
V
Note 1
I
C
C
C
V
See Figure 5-11
C
OH
OL
OL
SHDN
OL
OH
DD
F
F
F
F
F
F
= 1 µF, V
=1 µF, V
= 1.0 µF
= 1.0 µF
= 1.0 µF
= 1.0 µF
= 1 mA, Note 1
= 2.5 mA
= 5 mA, Note 1
Test Conditions
= 10% of V
= 5V,
= 80% of V
, V
DS21449C-page 3
TC649
HYST
IN
IN
= 0.35V
= V
DD
DD
C(MAX)