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1. General description
2. Features
c
c
3. Applications
4. Quick reference data
TDA8943SF
6 W mono Bridge Tied Load (BTL) audio amplifier
Rev. 02 — 7 April 2000
The TDA8943SF is a single-channel audio power amplifier with an output power of
6 W at an 8
load and a 12 V supply. The circuit contains a Bridge Tied Load (BTL)
amplifier with an all-NPN output stage and standby/mute logic. The TDA8943SF
comes in a 9-lead single in-line (SIL) medium power package. The TDA8943SF 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
= 12 V; R
=
CC
L
Product specification
Min
Typ
Max
Unit
6
12
18
V
-
15
22
mA
-
-
10
A
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Summary of Contents for Philips TDA8943SF
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Page 1: General Description
6 W mono Bridge Tied Load (BTL) audio amplifier Rev. 02 — 7 April 2000 1. General description The TDA8943SF is a single-channel audio power amplifier with an output power of 6 W at an 8 amplifier with an all-NPN output stage and standby/mute logic. The TDA8943SF comes in a 9-lead single in-line (SIL) medium power package. -
Page 2: Ordering Information
fin; 9 leads V CC TDA8943SF V CC STANDBY/ MODE MUTE LOGIC Rev. 02 — 7 April 2000 TDA8943SF = 8 ; 0.03 Version SOT110-1 SHORT CIRCUIT TEMPERATURE PROTECTION MBK942 © Philips Electronics N.V. 2000. All rights reserved. Unit 2 of 20... -
Page 3: Pinning Information
MODE n.c. 8. Functional description The TDA8943SF is a mono BTL audio power amplifier capable of delivering 6 W 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 4: Input Configuration
Philips Semiconductors 8.1 Input configuration The TDA8943SF inputs can be driven symmetrical (floating) as well as asymmetrical. In the asymmetrical mode one input pin is connected via a capacitor to the signal ground which should be as close as possible to the SVR (electrolytic) capacitor ground. -
Page 5: Headroom
8.3 Mode selection The TDA8943SF 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: Supply Voltage Ripple Rejection (Svrr)
A larger capacitor value on the SVR pin improves the ripple rejection behaviour at the lower frequencies. 8.5 Built-in protection circuits The TDA8943SF 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: Thermal Characteristics
Fig 4. Quiescent supply current as function of mode voltage. Rev. 02 — 7 April 2000 TDA8943SF Conditions Value in free air in free air Figure 13; unless otherwise specified. MGU041 V MODE (V) © Philips Electronics N.V. 2000. All rights reserved. Unit Unit 7 of 20... -
Page 8: Dynamic Characteristics
Rev. 02 — 7 April 2000 TDA8943SF Figure 13; unless otherwise specified. Unit 0.03 at the input. The ripple voltage is a sine MGU043 V MODE (V) © Philips Electronics N.V. 2000. All rights reserved. 8 of 20... - Page 9 Fig 9. Total power dissipation as function of supply voltage. Rev. 02 — 7 April 2000 TDA8943SF MGU039 P o = 0.1 (W) 1 (W) f (Hz) MGU045 R L = 8 V CC (V) © Philips Electronics N.V. 2000. All rights reserved. 9 of 20...
- Page 10 P o (W) Fig 11. Power dissipation as function of output power. Rev. 02 — 7 April 2000 TDA8943SF MGU046 R L = 8 P o (W) MGU042 f (Hz) © Philips Electronics N.V. 2000. All rights reserved. 10 of 20...
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Page 11: Internal Circuitry
1/2 V CC (SVR) 1, 3 1/2 V CC MGU080 V CC V CC 20 k V CC MUTE HIGH HIGH MGU079 V CC Standby 20 k 20 k MGU081 © Philips Electronics N.V. 2000. All rights reserved. MGU078 11 of 20... -
Page 12: Application Information
1/2 V CC signal 20 k Rev. 02 — 7 April 2000 TDA8943SF V CC 100 nF 1000 F 30 k 1/2 V CC 30 k SHORT CIRCUIT TEMPERATURE PROTECTION MGU036 © Philips Electronics N.V. 2000. All rights reserved. 12 of 20... -
Page 13: Power Supply Decoupling
6 W mono Bridge Tied Load (BTL) audio amplifier 54 mm 10 F 220 nF 1.5 nF 220 nF 100 nF 1000 F Rev. 02 — 7 April 2000 TDA8943SF 56 mm MUTE V CC MGU037 © Philips Electronics N.V. 2000. All rights reserved. 13 of 20... -
Page 14: Thermal Behaviour And Heatsink Calculation
Rev. 02 — 7 April 2000 TDA8943SF is 18 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. 14 of 20... -
Page 15: Package Outline
20.7 6.20 REFERENCES JEDEC EIAJ Rev. 02 — 7 April 2000 TDA8943SF 10 mm 2.75 1.75 15.1 2.50 1.55 14.9 EUROPEAN ISSUE DATE PROJECTION 92-11-17 95-02-25 © Philips Electronics N.V. 2000. All rights reserved. SOT110-1 max. 0.25 15 of 20... -
Page 16: Soldering
9397 750 06865 Product specification 6 W mono Bridge Tied Load (BTL) audio amplifier methods Soldering method Dipping suitable Rev. 02 — 7 April 2000 TDA8943SF stg(max) Wave suitable © Philips Electronics N.V. 2000. All rights reserved. 16 of 20... -
Page 17: Revision History
• Section 8.3 “Mode – Standby mode: V power consumption of the TDA8943SF 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 18: 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 19 Malaysia: Tel. +60 37 50 5214, Fax. +60 37 57 4880 Mexico: Tel. +9-5 800 234 7381 Middle East: see Italy For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax.
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Page 20: Table Of Contents
Disclaimers......18 © 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.
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