TDA5145 NXP Semiconductors, TDA5145 Datasheet - Page 15

• Manufacturer Part Number: TDA5145
• Manufacturer: NXP Semiconductors

Specifications of TDA5145

• Operating Temperature Classification: Commercial
• Package Type: PDIP
• Operating Supply Voltage (min): 4V
• Operating Supply Voltage (max): 18V
• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
M
DC motors can be controlled in an analog manner using
the OTA.
For the analog control an external transistor is required.
The OTA can supply the base current for this transistor
and act as a control amplifier (see Fig.8).
D
If the voltage at pin 10 is <0.8 V, the motor is running in
one direction (depending on the motor connections). If the
voltage at pin 10 >2.0 V, the motor is running in the other
direction.
BRAKE
If the voltage at pin 9 is >2.0 V, the motor brakes. In that
condition, the 3 outputs MOT1, MOT2 and MOT3 are
Table 3 Switching sequence after a reset pulse.
Note
1. Z = high-impedance OFF-state; L = LOW state; H = HIGH state.
June 1994
IRECTION FUNCTION
OTOR
Brushless DC motor drive circuit
DIR
H
H
H
H
H
H
H
C
L
L
L
L
L
L
L
FUNCTION
ONTROL
(1)
RESET
H
H
L
L
L
L
L
L
L
L
L
L
L
L
(1)
MOT1
H
H
H
H
H
Z
Z
Z
Z
Z
L
L
L
L
(1)
MOT2
15
H
H
H
H
L
L
L
Z
Z
L
L
L
Z
Z
forced at a LOW voltage level and the current limitation is
done internally by the sink drivers.
RESET
If the voltage at pin 21 is >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;
(1)
MOT1
MOT2
MOT3
H = HIGH state.
DRIVER OUTPUT
FUNCTION
DIR
H
H
H
H
H
Z
Z
Z
Z
Z
L
L
L
L
(1)
reset
normal direction mode
sequence
reset
reverse direction mode
sequence
RESET
> 2.0 V.
FUNCTION
Product specification
STATE
TDA5145
H
Z
L
(1)