THMC40 Datasheet, PDF (3/17 Pages) Texas Instruments – VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS

THMC40, THMC41
VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS
TERMINAL
NAME
NO.
AGND
9
CP
3
COSC
1
H–
12
H+
13
NC
6, 8
PGND
7
PHA
11
PHB
10
RD
2
TACH
2
VOUT
5
VPWR
4
VPWM
14
Terminal Functions
I/O
DESCRIPTION
I IC analog ground and substrate connection
I External charge pump capacitor
I/O External oscillator capacitor
I Hall sensor negative input
I Hall sensor positive input
– No connection
I Power ground for high-side charge pump
O Low-side driver for phase A motor winding
O Low-side driver for phase B motor winding
O Open-drain locked rotor detection output—THMC41 only
O Open-drain tachometer output signal—THMC40 only
O High-side PWM driver output for motor windings
I Supply voltage input
I PWM duty cycle control voltage input
SLIS097 – MARCH 2000
absolute maximum ratings over operating case temperature range (unless otherwise noted)^†
(see Note 1)
Supply voltage input, V_PWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
High-side driver, PWM output voltage, V_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
Low-side drivers, phase A and B output, V_PHA, V_PHB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
Hall sensor amplifier input voltage, V_H+, V_H– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
PWM duty cycle control input voltage, V_PWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Open-drain tachometer output voltage (THMC40), V_TACH, or open-drain RD output voltage
(THMC41), V_RD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Oscillator capacitor voltage, V_COSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Charge pump capacitor voltage, V_CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Continuous high-side PWM output source/sink current, I_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Continuous low-side PWM output sink current, I_PHA, I_PHB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Junction-to-case thermal resistance, R_θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.9°C/W
Junction-to-ambient thermal resistance , R_θJA (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.3°C/W
Continuous power dissipation at 25°C , P_D (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1022 mW
Power derating factor above 25°C ambient , P_DERATING (see Note 4) . . . . . . . . . . . . . . . . . . . . . 8.18 mW/°C
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. JEDEC low-K board with 0 LFM airflow
3. 150°C maximum junction temperature, JEDEC low-K board with 0 LFM airflow
4. 80°C maximum ambient and 150°C maximum junction temperature
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
3