THMC45 Datasheet, PDF (3/16 Pages) Texas Instruments – 5-V AND 3.3-V DC BRUSHLESS FAN MOTOR DRIVER WITH SINGLE WIRE CONTOL

TERMINAL
NAME NO.
GND
4
H+
6
H−
7
OUTA
2
OUTB
3
PWM
8
TACH
5
VPWR
1
THMC45
5ĆV AND 3.3ĆV DC BRUSHLESS FAN MOTOR DRIVER
WITH SINGLE WIRE CONTROL
SLIS101A − MAY 2001
Terminal Functions
I/O
DESCRIPTION
I Ground
I Hall sensor positive input
I Hall sensor negative input
O Motor winding drive output A
O Motor winding drive output B
I/O PWM duty cycle control input and tachometer/locked rotor detect current sink output
O Open drain tachometer output signal
I 5-V Supply voltage input
absolute maximum ratings over operating case temperature range (unless otherwise noted)^†
Supply voltage input, V_PWR (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Open-drain tachometer output voltage, V_TACH (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
H-bridge output voltage, V_OUTA, V_OUTB (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Hall sensor amplifier input voltage, V_H+, V_H− (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Speed control voltage input and tachometer/locked rotor feedback, V_PWM (see Note 1) . . . . . . . . . . . . . . 6 V
Continuous H-bridge output current source/sink, I_OUTA, I_OUTB (see Note 2) . . . . . . . . . . . . . . . . . . . . 350 mA
Continuous H-bridge output current source/sink, I_OUTA, I_OUTB (see Note 3) . . . . . . . . . . . . . . . . . . . . 260 mA
Continuous power dissipation, P_D (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 W
Operating case temperature range, T_C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30°C to 80°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C
Maximum junction temperature, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Lead temperature (soldering, 10 sec), T_LEAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to GND.
2. Assumed package plus PCB system thermal impedance = 170°C/W, TA = 25°C.
3. Assumed package plus PCB system thermal impedance = 170°C/W, TA = 80°C.
4. In free air at TA = 25°C, assumed 58.4°C/W and TJ = 150°C.
recommended operating conditions
Supply voltage, VPWR
PWM high-level input voltage, VIH
PWM low-level input voltage, VIL
PWM input frequency, fPWM
Operating case temperature, TC
MIN MAX UNIT
2.5
5V
2
V
0.8 V
18
50 kHz
−30
80 °C
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