tda3629t-n2 NXP Semiconductors, tda3629t-n2 Datasheet - Page 12

• Manufacturer Part Number: tda3629t-n2
• Description: Light Position Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Thermal aspects
The dissipation of the device is the sum of two sources:
the supply current (I
plus the motor current ( I
voltage (V
(I
is not running. It is obvious from the ratings that the
combination of V
allowed at T
note 2. But it is also improbable that the motor is
continuously driven, therefore the following assumptions
have been made.
1996 Sep 04
P
handbook, full pagewidth
I
P
m
Light position controller
=
= 900 mA and (V
V
2.2 k
I
m
P
1 k
) is approximately equal to I
P
I
V b
V b
amb
P
–
V
V SET
V FB
= 105 C; see chapter “Limiting values”
m
I
P
m
R SET
R FB
= 18 V, (I
). In formula:
P
+
P
I
m
I
m
100
m
nF
SET
V
FB
) times the supply voltage (V
) times the output saturation
P
m
V
) = 2.5 V can not be
P
I
–
m
V
) = 80 mA,
m
P(ss)
STAGE
INPUT
TDA3629
Fig.10 Worst case application diagram.
I SET
when the motor
I SET
TRANSMISSION
MECHANICAL
P
)
I ref
PROTECTION
- OVER VOLTAGE
- UNDER VOLTAGE
- TEMPERATURE
SHORT-CIRCUIT
COMPARATORS
BROKEN WIRE
12
WINDOWS
It is assumed that the device must be capable of moving
the motor from one end to the other in four equal steps and
that the total time needed for this excursion is 16 seconds.
After this excursion a pause is allowed before the same
pulses are used to return to the original position.
This operation is illustrated in Fig.11.
V b
AND
OUTPUT
STAGES
SUPPLY
V P1
V P2
V P
V P
OUT1
OUT2
43 V
V m
I m
Product specification
MGE641
M
47
TDA3629
F
100
100
nF
nF