TDF5140 Philips Semiconductors, TDF5140 Datasheet - Page 3

• Manufacturer Part Number: TDF5140
• Description: Brushless DC motor drive circuit
• Manufacturer: Philips Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1999 March 15
Brushless DC motor drive circuit
CAP-DC
CAP-CD
CAP-ST
AMP IN
AMP IN
CAP-TI
PG/FG
TEST
13
14
11
10
9
2
12
6
PROTECTION
THERMAL
DETECTOR
ROTATION
POSITION
OUTPUT
SPEED
STAGE
&
TDF5140A
AMP OUT
COMMUTATION
OSCILLATOR
15
ADAPTIVE
START-UP
DETECTOR
CONDUCTANCE
POSITION
DELAY
TIMING
DIVIDE
STAGE
AMPLIFIER
BY 2
TRANS-
PGIN
5
Fig.1 Block diagram
COMMUTATION
GND2
7
LOGIC
3
GND1
18
VMOT
V P
8
4
EMF COMPARATORS
OUTPUT DRIVER
OUTPUT DRIVER
D L
STAGE 2
STAGE 3
D H
OUTPUT
STAGE 1
DRIVER
PUSH/PULL
FLYBACK
MGH313
Product specification
16
17
TDF5140A
1
3
MOT1
MOT2
MOT3
MOT0