TC646 Microchip, TC646 Datasheet - Page 4

• Manufacturer Part Number: TC646
• Description: PWM Fan Speed Controller
• Manufacturer: Microchip

TC646
DC ELECTRICAL SPECIFICATIONS (CONTINUED)
DS21446C-page 4
Electrical Characteristics: Unless otherwise specified, T
V
V
V
V
V
V
V
V
Pulse Width Modulator
F
Note 1:
AS
OSC
IN
C(MAX),
C(SPAN)
SHDN
REL
HYST
HAS
Symbol
, V
AS
V
Inputs
OTF
Ensured by design, not tested.
Voltage at V
Cycle and Overtemp. Fault
V
Auto-shutdown Threshold
Voltage Applied to V
ensure Reset/Shutdown
Voltage Applied to V
Release Reset Mode
Hysteresis on V
Hysteresis on Auto-shutdown
Comparator
PWM Frequency
C(MAX)
- V
Parameter
C(MIN)
IN
for 100% Duty
SHDN,
IN
IN
V
to
to
REL
V
V
V
DD
C(MAX) ~
C(SPAN)
Min
2.5
1.3
26
—
—
—
x 0.19
MIN
T
A
0.01 x V
T
MAX
2.65
Typ
1.4
70
30
—
—
—
, V
DD
DD
= 3.0V to 5.5V
V
V
DD
C(MAX)
Max
2.8
1.5
—
—
34
—
x 0.13
Units
mV
Hz
V
V
V
V
V
V
2002 Microchip Technology Inc.
V
See Figure 5-11
C
DD
F
= 1.0 µF
= 5V,
Test Conditions