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1. General description
2. Features
c
c
3. Applications
4. Quick reference data
TDA8946J
2 x 15 W stereo Bridge Tied Load (BTL) audio amplifier
Rev. 02 — 14 March 2000
The TDA8946J is a dual-channel audio power amplifier with an output power of
2
15 W at an 8
load and a 18 V supply. The circuit contains two Bridge Tied Load
(BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8946J
comes in a 17-pin DIL-bent-SIL (DBS) power package. The TDA8946J is
printed-circuit board (PCB) compatible with all other types in the TDA894x family.
One PCB footprint accommodates both the mono and the stereo products.
Few external components
Fixed gain
Standby and mute mode
No on/off switching plops
Low standby current
High supply voltage ripple rejection
Outputs short-circuit protected to ground, supply and across the load
Thermally protected
Printed-circuit board compatible.
Mains fed applications (e.g. TV sound)
PC audio
Portable audio.
Table 1:
Quick reference data
Symbol Parameter
V
supply voltage
CC
I
quiescent supply current
q
I
standby supply current
stb
Conditions
V
= 18 V; R
=
CC
L
Product specification
Min
Typ
Max
Unit
6
18
25
V
-
28
42
mA
-
-
10
A
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Summary of Contents for Philips TDA8946J
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Page 1: General Description
2 x 15 W stereo Bridge Tied Load (BTL) audio amplifier Rev. 02 — 14 March 2000 1. General description The TDA8946J is a dual-channel audio power amplifier with an output power of 15 W at an 8 (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8946J comes in a 17-pin DIL-bent-SIL (DBS) power package. -
Page 2: Ordering Information
Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier = 8 ; 0.03 Version SOT243-1 OUT1 OUT1 OUT2 OUT2 SHORT CIRCUIT TEMPERATURE PROTECTION MBK929 GND2 © Philips Electronics N.V. 2000. All rights reserved. Unit 2 of 23... -
Page 3: Table Of Contents
(standby, mute, operating) half supply voltage decoupling (ripple rejection) positive input 2 Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier MBK932 © Philips Electronics N.V. 2000. All rights reserved. 3 of 23... -
Page 4: Gnd1
GND2 OUT2+ 8. Functional description The TDA8946J is a stereo BTL audio power amplifier capable of delivering 2 output power to an 8 external heatsink. The voltage gain is fixed at 32 dB. With the three-level MODE input the device can be switched from ‘standby’ to ‘mute’... -
Page 5: Power Amplifier
8.3 Mode selection The TDA8946J has three functional modes, which can be selected by applying the proper DC voltage to pin MODE. See which depend on the supply voltage level. The MODE pin can be driven by a 3-state logic output stage: e.g. -
Page 6: Switch-On And Switch-Off
A larger capacitor value on the SVR pin improves the ripple rejection behaviour at the lower frequencies. 8.5 Built-in protection circuits The TDA8946J contains two types of protection circuits, i.e. short-circuit and thermal shutdown. 8.5.1 Short-circuit protection Short-circuit to ground or supply line —... -
Page 7: Limiting Values
< V MODE Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier + 0.3 +150 Value Figure 14; unless otherwise specified. © Philips Electronics N.V. 2000. All rights reserved. Unit Unit Unit 7 of 23... -
Page 8: Dynamic Characteristics
2 x 15 W stereo BTL audio amplifier MGU006 V CC = 18 V 12 V V MODE (V) Figure 14; audio pass band 11.5 0.03 at the input. The ripple voltage is a sine © Philips Electronics N.V. 2000. All rights reserved. Unit 8 of 23... - Page 9 V CC = 12 V 18 V P o (W) Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier MGU008 V MODE (V) MGU003 © Philips Electronics N.V. 2000. All rights reserved. 9 of 23...
- Page 10 V CC = 18 V V CC = 12 V P o = 1 W V CC = 18 V f (Hz) MGU011 R L = 8 V CC (V) © Philips Electronics N.V. 2000. All rights reserved. 10 of 23...
- Page 11 Fig 11. Power dissipation as function of output power. (dB) Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier MGU012 R L = 8 P o (W) MGU009 f (Hz) © Philips Electronics N.V. 2000. All rights reserved. 11 of 23...
- Page 12 Fig 13. Supply voltage ripple rejection as function of frequency. 9397 750 06863 Product specification Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier MGU007 f (Hz) © Philips Electronics N.V. 2000. All rights reserved. 12 of 23...
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Page 13: Internal Circuitry
1, 4, 14, 17 1/2 V CC MGL947 V CC V CC 20 k V CC MUTE HIGH HIGH MGL949 V CC Standby 20 k 20 k MGL948 © Philips Electronics N.V. 2000. All rights reserved. 6, 12 MGL946 13 of 23... -
Page 14: Application Information
V CC 100 nF 1000 F 30 k OUT1 1/2 V CC OUT1 30 k OUT2 1/2 V CC OUT2 V CC 30 k SHORT CIRCUIT TEMPERATURE PROTECTION MGU014 © Philips Electronics N.V. 2000. All rights reserved. 14 of 23... -
Page 15: Power Supply Decoupling
OUT2 OUT2 10 F 220 nF 1.5 nF 220 nF OUT1 100 nF 1000 F OUT1 Rev. 02 — 14 March 2000 TDA8946J 56 mm MUTE V CC MGU069 © Philips Electronics N.V. 2000. All rights reserved. 15 of 23... -
Page 16: Out2
2 x 15 W stereo BTL audio amplifier is 4.5 K/W. th(j-mb) th(mb-h) should be reduced to 125 C. This requires a = 8 ; audio pass band 22 Hz to 22 kHz; © Philips Electronics N.V. 2000. All rights reserved. is ignored. 16 of 23... -
Page 17: Package Outline
Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier view B: mounting base side 12.4 0.03 11.0 EUROPEAN ISSUE DATE PROJECTION 97-12-16 99-12-17 © Philips Electronics N.V. 2000. All rights reserved. SOT243-1 2.00 1.45 17 of 23... -
Page 18: Soldering
9397 750 06863 Product specification methods Soldering method Dipping suitable Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier stg(max) Wave suitable © Philips Electronics N.V. 2000. All rights reserved. 18 of 23... -
Page 19: Out2
• Section 8.3 “Mode – Standby mode: V The power consumption of the TDA8946J will be reduced to <0.18 mW – Mute mode: the DC level of the input and output pins remain on half the supply voltage – 2.5 V < V –... - Page 20 9397 750 06863 Product specification 15: figure added 16: Section 15.1 Rev. 02 — 14 March 2000 TDA8946J 2 x 15 W stereo BTL audio amplifier added added updated added © Philips Electronics N.V. 2000. All rights reserved. 20 of 23...
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Page 21: Data Sheet Status
Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. - Page 22 Mexico: Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Tel. +31 40 278 2785, Fax. +31 40 278 8399 For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax.
- Page 23 Disclaimers......21 © Philips Electronics N.V. 2000. All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.