TDA5146T Philips Semiconductors, TDA5146T Datasheet - Page 15

• Manufacturer Part Number: TDA5146T
• Description: Brushless DC motor drive circuit
• Manufacturer: Philips Semiconductors

Philips Semiconductors
RESET function
If the voltage on pin 8 is higher than 2.0V, the output states are:
SWITCHING SEQUENCE AFTER A RESET PULSE
PRIORITY OF FUNCTION
RELIABILITY
It is necessary to protect high current circuits and the output stages are protected in two ways:
1994 May 18
MOT 1 – Float
MOT 2 – Low
MOT 3 – High
Current limiting of the ’lower’ output transistors. The ’upper’ output transistors use the same base current as the conducting ’lower’ transistor
(+15% ). This means that the current to and from the output stages is limited.
Thermal protection of the six output transistors is achieved by each transistor having a thermal sensor that is active when the transistor is
switched on. The transistors are switched off when the local temperature becomes too high.
Brushless DC motor drive circuit
DIR
H
H
H
H
H
H
H
L
L
L
L
L
L
L
BRAKE
H
H
H
H
L
L
L
L
RESET
H
H
L
L
L
L
L
L
L
L
L
L
L
L
MOT1
H
H
H
H
H
F
F
F
L
L
F
L
L
F
TEST
TEST
H
H
H
H
L
L
L
L
R = ((V
MOT2
P
Figure 10.
H
H
H
H
L
L
L
F
F
L
L
L
F
F
– 0.4) .10
15
e4
V
) /6
P
RESET
H
H
H
H
L
L
L
L
MOT3
H
H
H
H
H
F
L
L
F
F
F
F
L
L
Reverse direction mode sequence
Normal direction mode sequence
FUNCTION
FUNCTION
Reset
Reset
Normal
Reset
Brake
Brake
Brake
Brake
Test
Test
TDA5146T
SL01524
Product specification