tdf5242t NXP Semiconductors, tdf5242t Datasheet - Page 3

• Manufacturer Part Number: tdf5242t
• Description: Brushless Dc Motor Drive Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1997 Sep 12
handbook, full pagewidth
Brushless DC motor drive circuit
CAP-DC
CAP-CD
CAP-ST
AMP IN
AMP IN
CAP-TI
TEST
n.c.
FG
19
20
16
15
14
18
10
12, 17, 25
8
PROTECTION
DIRECTION
THERMAL
LOGIC
DIR
7
COMMUTATION
OSCILLATOR
TDF5242T
DETECTOR
ROTATION
START-UP
ADAPTIVE
OUTPUT
TIMING
SPEED
STAGE
DELAY
AND
BRAKE
LOGIC
AMP OUT
21
CONDUCTANCE
BRAKE
AMPLIFIER
Fig.1 Block diagram.
TRANS-
9
GND2 GND1
COMMUTATION
3
11
LOGIC
3
V P
VMOT
13
6
EMF COMPARATORS
OUTPUT DRIVER STAGE
OUTPUT DRIVER
OUTPUT DRIVER
OUTPUT DRIVER
OUTPUT DRIVER
OUTPUT DRIVER
STAGE
STAGE
STAGE
STAGE
STAGE
Preliminary specification
MGG988
TDF5242T
27
28
22
23
24
26
1
2
4
5
OUT-NA
OUT-PA
OUT-NB
OUT-PB
OUT-PC
OUT-NC
COMP-A
COMP-B
COMP-C
MOT0