TC646 Datasheet, PDF (4/28 Pages) Microchip Technology – PWM Fan Speed Controller with Auto-Shutdown and FanSense™ Technology

TC646
DC ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise specified, T_MIN ≤ T_A ≤ T_MAX, V_DD = 3.0V to 5.5V
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
V_IN, V_AS Inputs
V_C(MAX),V_OTF Voltage at V_IN for 100% Duty
Cycle and Overtemp. Fault
V_C(SPAN)
V_AS
V_C(MAX) - V_C(MIN)
Auto-shutdown Threshold
V_SHDN
V_REL
V_HYST
V_HAS
Voltage Applied to V_IN to
ensure Reset/Shutdown
Voltage Applied to V_IN to
Release Reset Mode
Hysteresis on V_SHDN, V_REL
Hysteresis on Auto-shutdown
Comparator
Pulse Width Modulator
F_OSC
PWM Frequency
Note 1: Ensured by design, not tested.
2.5
2.65
2.8
V
1.3
V_{C(MAX) ~}
V_C(SPAN)
—
V_DD x 0.19
—
—
1.4
1.5
V
—
V_C(MAX)
V
—
V_DD x 0.13 V
—
—
V V_DD = 5V,
See Figure 5-11
0.01 x V_DD
—
V
70
—
mV
26
30
34
Hz C_F = 1.0 µF
DS21446C-page 4
 2002 Microchip Technology Inc.