TDA8946AJ/N2,112 NXP Semiconductors, TDA8946AJ/N2,112 Datasheet - Page 6

• Manufacturer Part Number: TDA8946AJ/N2,112
• Description: IC AMP AUDIO PWR 15W STER 17SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TDA8946AJ/N2,112

• Output Type: 2-Channel (Stereo)
• Package / Case: 17-SIL (Bent and Staggered Leads)
• Max Output Power X Channels @ Load: 15W x 2 @ 8 Ohm
• Voltage - Supply: 4.5 V ~ 18 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Product: Class-AB
• Output Power: 15 W
• Available Set Gain: 30 dB
• Thd Plus Noise: 0.07 %
• Operating Supply Voltage: 18 V
• Maximum Power Dissipation: 28000 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 8 Ohms
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Type: Single
• Supply Voltage (max): 18 V
• Supply Voltage (min): 4.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3456-5; 935270283112; TDA8946AJU

Philips Semiconductors
9397 750 09434
Product data
8.3.1 Switch-on and switch off
8.3 Mode selection
8.4 DC gain control
8.5 Supply Voltage Ripple Rejection (SVRR)
Table 4:
For the average listening level a power dissipation of 8.5 W can be used for a
heatsink calculation.
The TDA8946AJ has three functional modes, which can be selected by applying the
proper DC voltage to pin MODE.
Standby — In this mode the current consumption is very low and the outputs are
floating. The device is in standby mode when V
MODE pin is left floating.
Mute — In this mode the amplifier is DC-biased but not operational (no audio output).
This allows the input coupling capacitors to be charged to avoid pop-noise. The
device is in mute mode when 3.5 V < V
Operating — In this mode the amplifier is operating normally. The operating mode is
activated at V
To avoid audible plops during supply voltage switch-on or switch-off, the device is set
to standby mode before the supply voltage is applied (switch-on) or removed
(switch-off).
The switch-on and switch-off time can be influenced by an RC-circuit on the MODE
pin. Rapid on/off switching of the device or the rapid switching of the MODE pin may
cause ‘click-and pop-noise’. This can be prevented by proper timing of the RC-circuit
on the MODE pin.
The gain of both amplifiers can be adjusted (logarithmic) by applying an external DC
voltage source on pin GC (see
This feature can be used for volume control or preset gain.
The maximum voltage gain is set at +30 dB and the control range is more than 80 dB,
so the minimal gain is less than 50 dB. When pin GC is not connected, the gain is
set at +24 dB.
The SVRR is measured with an electrolytic capacitor of 10 F on pin SVR at a
bandwidth of 10 Hz to 80 kHz.
frequency. A larger capacitor value on the SVR pin improves the ripple rejection
behaviour at the lower frequencies.
Headroom
0 dB
12 dB
Power rating as function of headroom
MODE
Rev. 01 — 01 March 2002
< 1.0 V.
Power output (THD = 0.2%)
P
P
o
o(ALL)
= 10 W
= 631 mW
Figure
Figure 14
2 x 15 W BTL audio amplifier with DC gain control
6). The DC voltage source range is 0.5 to 4.0 V.
MODE
illustrates the SVRR as function of the
< (V
MODE
CC
Power dissipation
P = 17 W
P = 8.5 W
> (V
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
1.5 V).
CC
TDA8946AJ
0.5 V), or when the
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