TDA5146T Datasheet, PDF (5/18 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5146T
FUNCTIONAL DESCRIPTION
The TDA5146T offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor drive and full–wave
drive.
The TDA5146T offers protected outputs capable of handling high currents and can be used with star or delta connected motors. It can easily be
adapted for different motors and applications. The TDA5146T offers the following features:
• Sensorless commutation by using the motor EMF
• Built–in start–up circuit
• Optimum commutation, independent of motor type or motor loading
• Built–in flyback diodes
• Three phase full–wave drive
• High output current (1.8 A)
• Outputs protected by current limiting and thermal protection of each output transistor
• Low current consumption by adaptive base–drive
• Soft switching pulse output for low radiation.
• Accurate frequency generator (FG) by using the motor BMF
• Direction of rotation controlled by one pin.
• FET driver stage to be used in a buck converter
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
Symbol
Parameter
V_P, V_sup
V_I
V_VMOT
V_O
V_O
V_I
T_stg
T_amb
P_tot
Supply voltage
Input voltage; all pins except VMOT (V_I <18 V)
V_VMOT input voltage
Output voltage; PWM_OUT and PG/FG
Output voltage MOT0, MOT1, MOT2 and MOT3
Input voltage CAP–ST, CAP–TI, CAP–CD and CAP–DC
Storage temperature range
Operating ambient temperature range
Total power dissipation
Min
–
–0.3
–0.5
GND
–1
–
–55
0
–
Max
18
V_P+0.5
17
V_P
V_VMOT + V_D
2.5
+150
70
–
Unit
V
V
V
V
V
V
°C
°C
–
HANDLING
Every pin withstands the ESD test according to MIL–STD–883C cross 1. Method 3015 (HBM 1500W, 100 pF 3 pulses + and 3 pulses – on each
pin referenced to ground.
1994 May 18
5