TDA8931T NXP Semiconductors, TDA8931T Datasheet - Page 18

Comparator ICs 1 CHAN CLASS D AMP 1X15W

TDA8931T

Manufacturer Part Number
TDA8931T
Description
Comparator ICs 1 CHAN CLASS D AMP 1X15W
Manufacturer
NXP Semiconductors
Datasheet

Specifications of TDA8931T

Number Of Channels
1 Channel
Product
Digital Comparators
Response Time
0.12 us
Offset Voltage (max)
10 mV
Input Bias Current (max)
0.06 uA
Supply Voltage (max)
35 V
Supply Voltage (min)
12 V
Maximum Power Dissipation
2500 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-163
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
TDA8931T/N1,112

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA8931T
Manufacturer:
PHILIPS/飞利浦
Quantity:
20 000
Part Number:
TDA8931TN1
Quantity:
2 000
Philips Semiconductors
9397 750 13847
Preliminary data sheet
14.2 Output current limiting
14.3 Low pass filter considerations
14.4 Thermal behavior (printed-circuit board considerations)
The output current is limited by the OCP with a threshold level of 3.3 A (minimum). During
normal operation the output current should not exceed this threshold level, otherwise the
output signal is distorted. The peak output current should stay below 3.3 A and can be
estimated using the following equation:
Where:
Example: With a 4
will result in an absolute maximum output power of P
For a flat frequency response (second order Butterworth filter) it is necessary to change
the LC-filter components (L1 and C14) according to the speaker impedance.
shows the required components values in case of a 4 W, 6 W or 8 W speaker impedance.
Table 12:
The SO20 package of the TDA8931T has special thermal corner leads, significantly
increasing the power capability (reducing R
should be attached to a copper area (V
The typical thermal resistance R
convection) when soldered on a double sided FR4 PCB with 35 m copper layer and
cooling area of approximately of 28 cm
I
Speaker impedance
( )
4
6
8
O
I
V
R
R
R
R
O
P
DSon
L
coil
ESR
= output current in the load in
------------------------------------------------------------------------------ -
2
= supply voltage (V
= load impedance
= series resistance output coil
= ESR of the single-ended capacitor
= on-resistance power switch
R
DSon
Filter components values
+
R
V
L
P
+
Rev. 01 — 14 January 2004
load the OCP will be triggered below a supply voltage of 28 V. This
R
coil
DDP
+
R
L1 value
( H)
22
33
47
V
ESR
SSP
th(j-a)
)
3.3
of the TDA8931T is 24 K/W (free air and natural
2
SS
.
) on the PCB for cooling.
th
). The corner leads (pins 1, 10, 11 and 20)
o
= 26 W at THD = 10 %.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Power comparator 1
C14 value
(nF)
680
470
330
TDA8931
Table 12
18 of 31
20 W
(4)

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