TC647B Microchip Technology Inc., TC647B Datasheet - Page 3

• Manufacturer Part Number: TC647B
• Description: Pwm Fan Speed Controllers With Minimum Fan Speed, Fan Restart And Fansense Technology For Fault Detection
• Manufacturer: Microchip Technology Inc.

1.0
Absolute Maximum Ratings †
Supply Voltage (V
Input Voltage, Any Pin................(GND - 0.3V) to (V
Operating Temperature Range ....................- 40°C to +125°C
Maximum Junction Temperature, T
ESD Protection on all pins ........................................... > 3 kV
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise specified, all limits are specified for -40°C < T
Supply Voltage
Supply Current, Operating
Supply Current, Shutdown Mode
V
Sink Current at V
Source Current at V
V
Input Voltage at V
PWM Duty Cycle
Over-Temperature Indication
Threshold
Over-Temperature Indication
Threshold Hysteresis
V
Minimum Speed Threshold
Voltage Applied to V
Shutdown Mode
Voltage Applied to V
Shutdown Mode
Hysteresis on V
V
Pulse-Width Modulator
PWM Frequency
Note 1:
OUT
IN
C(MAX)
IN
2003 Microchip Technology Inc.
, V
, V
Output
MIN
MIN
2:
- V
ELECTRICAL
CHARACTERISTICS
Inputs
Input Leakage
C(MIN)
Ensured by design, tested during characterization.
For V
Parameters
SHDN
DD
OUT
IN
DD
) .......................................................6.0V
OUT
or V
MIN
MIN
, V
< 3.7V, t
Output
REL
to Ensure
to Release
Output
MIN
for 100%
STARTUP
J
........................... +150°C
and t
I
V
V
DD(SHDN)
V
V
OTF-HYS
MP
V
C(SPAN)
V
V
f
Sym
C(MAX)
V
V
PWM
I
I
SHDN
HYST
I
I
DD
OH
OTF
REL
OL
MIN
DD
IN
timers are typically 13/f.
DD
+0.3V)
V
V
V
DD
C(MAX)
C(SPAN)
2.45
- 1.0
Min
3.0
1.0
5.0
1.3
26
—
—
—
—
x 0.19
-
0.03 x V
V
PIN FUNCTION TABLE
C(MAX)
20 mV
2.60
Typ
200
1.4
—
30
—
—
80
—
—
—
30
SENSE
DD
FAULT
Name
+
V
GND
V
V
V
C
OUT
MIN
DD
IN
F
V
V
TC642B/TC647B
DD
C(MAX)
Max
+1.0
2.75
400
5.5
1.5
—
34
—
—
—
—
x 0.13
A
Analog Input
Analog Output
Analog Input
Ground
Digital (Open-Drain) Output
Digital Output
Power Supply Input
Analog Input
< +85°C, V
Units
mV
µA
µA
µA
Hz
mA
mA
V
V
V
V
V
V
V
V
DD
Pins 6, 7 Open,
C
Pins 6, 7 Open,
C
V
V
For TC642B Only
For TC642B Only
V
Note 1
C
F
F
OL
OH
DD
F
Function
= 3.0V to 5.5V.
= 1 µF, V
= 1 µF, V
= 1.0 µF
= 10% of V
= 5V
= 80% of V
Conditions
DS21756B-page 3
IN
MIN
= V
DD
DD
= 0.35V
C(MAX)