tda5145ts-c1 NXP Semiconductors, tda5145ts-c1 Datasheet - Page 13

• Manufacturer Part Number: tda5145ts-c1
• Description: Brushless Dc Motor Drive Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Other design aspects
There are other design aspects concerning the application
of the TDA5145TS besides the commutation function.
They are:
D
If the voltage at pin 9 is less than 0.8 V, the motor is
running in one direction (depending on the motor
connections). If the voltage at pin 9 is greater than 2.0 V,
the motor is running in the opposite direction.
BRAKE
If the voltage at pin 8 is greater than 2.0 V, the motor
brakes. In that condition, the 3 outputs MOT1, MOT2 and
MOT3 are forced to a LOW voltage level and the current
limitation is performed internally by the sink drivers.
1998 Oct 27
handbook, full pagewidth
IRECTION FUNCTION
Direction function
Brake function
Reliability.
Brushless DC motor drive circuit
If the chosen value of CAP-TI is too small oscillations can occur in certain positions of a blocked rotor. If the chosen value is too large, then it is possible
that the motor may run in the reverse direction (synchronously with little torque).
FUNCTION
Fig.9 Typical CAP-TI and V
on CAP-TI
V MOT 1
voltage
MOT1
voltage waveforms in normal running mode.
13
RESET
If the voltage at pin 18 is greater than 2.0 V, the output
states are shown in Table 2.
Table 2 Output states if V
Note
1. Z = high-impedance OFF-state; L = LOW state;
H = HIGH state.
DRIVER OUTPUT
FUNCTION
MOT1
MOT2
MOT3
RESET
MGH318
> 2.0 V
TDA5145TS
Product specification
STATE
H
Z
L
(1)