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TDA8920B_2

Product data sheet

Rev. 02 — 07 November 2005

32 of 34

Philips Semiconductors

TDA8920B

100 W class-D power amplifier

17. Revision history

Table 12:

Revision history

Document ID

Release date

Data sheet status

Change notice

Doc. number

Supersedes

TDA8920B_2

20051107

Product data sheet

TDA8920B_1

Modifications:

•

Section 9 “Limiting values”

the maximum value for the supply voltage is given for both

operating and non operating conditions (see

Table 5

)

TDA8920B_1

20041001

Preliminary data sheet

9397 750 13356

Содержание TDA8920B

Страница 1: ...art up no pop noise due to DC offset High efficiency Operating supply voltage from 12 5 V to 30 V Low quiescent current Usable as a stereo Single Ended SE amplifier or as a mono amplifier in Bridge Tied Load BTL Fixed gain of 30 dB in Single Ended SE and 36 dB in Bridge Tied Load BTL High output power High supply voltage ripple rejection Internal switching frequency can be overruled by an external...

Страница 2: ... V Iq tot total quiescent supply current no load no filter no RC snubber network connected 50 65 mA Stereo single ended configuration Po output power RL 3 Ω THD 10 VP 27 V 110 W RL 4 Ω THD 10 VP 27 V 86 W Mono bridge tied load configuration Po output power RL 6 Ω THD 10 VP 27 V 210 W Table 2 Ordering information Type number Package Name Description Version TDA8920BTH HSOP24 plastic heatsink small ...

Страница 3: ...BTH TDA8920BJ BOOT1 DRIVER LOW RELEASE1 SWITCH1 ENABLE1 CONTROL AND HANDSHAKE PWM MODULATOR MANAGER OSCILLATOR TEMPERATURE SENSOR CURRENT PROTECTION VOLTAGE PROTECTION STABI MODE INPUT STAGE mute 9 3 8 2 IN1M IN1P 22 15 21 14 20 13 17 11 16 10 15 9 VSSP2 VSSP1 DRIVER HIGH DRIVER LOW RELEASE2 SWITCH2 ENABLE2 CONTROL AND HANDSHAKE PWM MODULATOR 11 5 SGND1 7 1 OSC 2 19 SGND2 6 23 MODE INPUT STAGE mut...

Страница 4: ...DA1 SGND1 VSSA1 PROT VDDP1 BOOT1 OUT1 VSSP1 STABI VSSP2 OUT2 BOOT2 VDDP2 VSSD VSSA2 SGND2 VDDA2 IN2M IN2P MODE 001aab218 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Table 3 Pin description Symbol Pin Description TDA8920BTH TDA8920BJ VSSA2 1 18 negative analog supply voltage for channel 2 SGND2 2 19 signal ground for channel 2 VDDA2 3 20 positive analog supply voltage for channel 2 ...

Страница 5: ...ector are built in The two audio channels of the TDA8920B contain two PWM modulators two analog feedback loops and two differential input stages It also contains circuits common to both channels such as the oscillator all reference sources the mode functionality and a digital timing manager The TDA8920B contains two independent amplifier channels with high output power high efficiency low distorti...

Страница 6: ...pin in Mute mode the bias current setting of the VI converters is zero VI converters disabled and in Operating mode the bias current is at maximum The time constant required to apply the DC output offset voltage gradually between Mute and Operating mode levels can be generated via an RC network on the MODE pin An example of a switching circuit for driving pin MODE is illustrated in Figure 4 If the...

Страница 7: ...is at least 350 ms for the transition between mute and operating Lower diagram When switching directly from standby to operating there is a first delay of 100 ms before the outputs starts switching The audio signal is available after a second delay of 50 ms For pop noise free start up it is recommended that the time constant applied to the MODE pin is at least 500 ms for the transition between sta...

Страница 8: ...UBP The reaction of the device to the different fault conditions differs per protection 8 3 1 OverTemperature Protection OTP If the junction temperature Tj 150 C then the power stage will shut down immediately The power stage will start switching again if the temperature drops to approximately 130 C thus there is a hysteresis of approximately 20 C 8 3 2 OverCurrent Protection OCP When the loudspea...

Страница 9: ...e start up procedure is interrupted and the system waits for open circuit outputs Because the test is done before enabling the power stages no large currents will flow in the event of a short circuit This system is called Window Protection WP and protects for short circuits at both sides of the output filter to both supply lines When there is a short circuit from the power PWM output of the power ...

Страница 10: ...ed if the voltage difference between them exceeds a certain level This level depends on the sum of both supply voltages An expression for the unbalanced threshold level is as follows Vth ub 0 15 VDDA VSSA When the supply voltage difference drops below the threshold level the system is restarted again after 100 ms Example With a symmetrical supply of 30 V the protection circuit will be triggered if...

Страница 11: ...input configuration for a mono BTL application is illustrated in Figure 6 In the stereo single ended configuration it is also recommended to connect the two differential inputs in anti phase This has advantages for the current handling of the power supply at low signal frequencies 9 Limiting values 1 Overvoltage protection might be activated 2 Current limiting concept See also Section 13 6 Fig 6 I...

Страница 12: ...in Typ Max Unit Supply VP supply voltage 1 12 5 27 30 V Iq tot total quiescent supply current no load no filter no RC snubber network connected 50 65 mA Istb standby supply current 150 500 µA Mode select input pin MODE VI input voltage 2 0 6 V II input current VI 5 5 V 100 300 µA Vstb input voltage for Standby mode 2 3 0 0 8 V Vmute input voltage for Mute mode 2 3 2 2 3 0 V Von input voltage for O...

Страница 13: ...itching characteristics Temperature protection Tprot temperature protection activation 150 C Thys hysteresis of temperature protection 20 C Table 7 Static characteristics continued VP 27 V fosc 317 kHz Tamb 25 C unless otherwise specified Symbol Parameter Conditions Min Typ Max Unit Fig 7 Behavior of mode selection pin MODE STBY MUTE ON 5 5 coa021 VMODE V 4 2 3 0 2 2 0 8 0 VO V Voo mute Voo on slo...

Страница 14: ... of Rs 7 Po 1 W Rs 0 Ω fi 1 kHz 8 Vi Vi max 1 V RMS fi 1 kHz Table 9 Stereo and dual SE application characteristics VP 27 V RL 4 Ω fi 1 kHz fosc 317 kHz RsL 0 1 Ω 1 Tamb 25 C unless otherwise specified Symbol Parameter Conditions Min Typ Max Unit Po output power RL 3 Ω VP 27 V 2 THD 0 5 87 W THD 10 110 W RL 4 Ω VP 27 V 2 THD 0 5 69 W THD 10 86 W RL 6 Ω VP 27 V 2 THD 0 5 48 W THD 10 60 W RL 8 Ω VP ...

Страница 15: ...When using the power amplifier in a mono BTL application the inputs of both channels must be connected in parallel and the phase of one of the inputs must be inverted see Figure 6 In principle the loudspeaker can be connected between the outputs of the two single ended demodulation filters Table 10 Mono BTL application characteristics VP 27 V RL 8 Ω fi 1 kHz fosc 317 kHz RsL 0 1 Ω 1 Tamb 25 C unle...

Страница 16: ...ient to guarantee pop noise free start up see also Figure 4 5 and 7 13 3 Output power estimation The achievable output powers in several applications SE and BTL can be estimated using the following expressions SE 1 Maximum current internally limited to 8 A 2 BTL 3 Maximum current internally limited to 8 A 4 Variables RL load impedance fosc oscillator frequency tmin minimum pulse width typically 15...

Страница 17: ...llator ROSC connected between pin OSC and VSSA External oscillator connect the oscillator signal between pins OSC and SGND ROSC and COSC removed 13 5 Heatsink requirements In some applications it may be necessary to connect an external heatsink to the TDA8920B Limiting factor is the 150 C maximum junction temperature Tj max which cannot be exceeded The expression below shows the relationship betwe...

Страница 18: ...like dynamic impedance drops of the loudspeakers used The impedance threshold Zth depends on the supply voltage used Depending on the impedance of the short circuit the amplifier will react as follows 1 Short circuit impedance Zth the maximum output current of the amplifier is regulated to 8 A but the amplifier will not shut down its PWM outputs Effectively this results in a clipping output signal...

Страница 19: ...lied by a symmetrical voltage e g VDD 27 V and VSS 27 V When the amplifier is used in a SE configuration a so called pumping effect can occur During one switching interval energy is taken from one supply e g VDD while a part of that energy is delivered back to the other supply line e g VSS and visa versa When the voltage supply source cannot sink energy the voltage across the output capacitors of ...

Страница 20: ...920BTH The internal heat spreader of the TDA8920BTH is internally connected to VSS The external heatsink must be connected to the ground plane Use a thermal conductive electrically non conductive Sil Pad between the backside of the TDA8920BTH and a small external heatsink The differential inputs enable the best system level audio performance with unbalanced signal sources In case of hum due to flo...

Страница 21: ...FB GND C28 220 pF R11 470 nF 5 6 kΩ R13 10 Ω R14 22 Ω OUT2M OUT2P LS2 C32 100 nF C9 100 nF C31 FB GND 470 nF 5 6 kΩ C29 100 nF VDDA VSSA 19 24 13 VSSA VSSP V DDA2 V SSA2 PROT n c 20 21 22 VSSP V SSP2 OUT2 BOOT2 23 VDDP V DDP2 V SSD C34 100 nF C35 FB GND FB GND 100 nF VDDA VSSA C12 100 nF C13 V DDA1 V SSA1 100 nF C37 15 nF C27 L4 100 nF C39 100 nF C38 VSSP VDDP 17 V SSP1 14 U1 V DDP1 6 MODE 7 12 10...

Страница 22: ... as a function of output power SE configuration with 2 4 Ω load VP 27 V 1 6 Ω BTL configuration 1 f 6 kHz 2 f 1 kHz 3 f 100 Hz VP 27 V 1 8 Ω BTL configuration 1 f 6 kHz 2 f 1 kHz 3 f 100 Hz Fig 12 THD N S as a function of output power BTL configuration with 1 6 Ω load Fig 13 THD N S as a function of output power BTL configuration with 1 8 Ω load Po W 10 2 103 102 10 1 10 1 001aab225 10 1 10 2 10 1...

Страница 23: ...nction of frequency SE configuration with 2 4 Ω load VP 27 V 1 6 Ω BTL configuration 1 Pout 1 W 2 Pout 10 W VP 27 V 1 8 Ω BTL configuration 1 Pout 1 W 2 Pout 10 W Fig 16 THD N S as a function of frequency BTL configuration with 1 6 Ω load Fig 17 THD N S as a function of frequency BTL configuration with 1 8 Ω load 001aab229 10 1 10 2 10 1 102 10 3 f Hz 10 105 104 102 103 1 2 THD N S 001aab230 10 1 ...

Страница 24: ...y SE configuration with 2 4 Ω load VP 27 V f 1 kHz 1 2 3 Ω SE configuration 2 2 4 Ω SE configuration 3 1 6 Ω BTL configuration 4 1 8 Ω BTL configuration VP 27 V f 1 kHz 1 2 3 Ω SE configuration 2 2 4 Ω SE configuration 3 1 6 Ω BTL configuration 4 1 8 Ω BTL configuration Fig 20 Power dissipation as a function of total output power Fig 21 Efficiency as a function of total output power 001aab233 60 4...

Страница 25: ... function of supply voltage THD N 10 Vi 100 mV Rs 5 6 kΩ Ci 330 pF VP 27 V 1 1 8 Ω BTL configuration 2 1 6 Ω BTL configuration 3 2 4 Ω BTL configuration 4 2 3 Ω BTL configuration Vi 100 mV Rs 0 Ω Ci 330 pF VP 27 V 1 1 8 Ω BTL configuration 2 1 6 Ω BTL configuration 3 2 4 Ω BTL configuration 4 2 3 Ω BTL configuration Fig 24 Gain as a function of frequency Rs 5 6 kΩ and Ci 330 pF Fig 25 Gain as a fu...

Страница 26: ... Both supply lines rippled 2 One supply line rippled Vi 100 mV f 1 kHz Fig 26 SVRR as a function of frequency Fig 27 Output voltage as a function of mode voltage VP 27 V Rs 5 6 kΩ 20 kHz AES17 filter 1 2 3 Ω SE configuration and 1 6 Ω BTL configuration 2 2 4 Ω SE configuration and 1 8 Ω BTL configuration Fig 28 S N ratio as a function of output power 001aab241 60 40 80 20 0 SVRR dB 100 f Hz 10 105...

Страница 27: ... 0 35 DIMENSIONS mm are the original dimensions Notes 1 Limits per individual lead 2 Plastic or metal protrusions of 0 25 mm maximum per side are not included SOT566 3 0 5 10 mm scale HSOP24 plastic heatsink small outline package 24 leads low stand off height SOT566 3 A max detail X A2 3 5 3 2 D2 1 1 0 9 HE 14 5 13 9 Lp 1 1 0 8 Q 1 7 1 5 2 7 2 2 v 0 25 w 0 25 y Z 8 0 θ 0 07 x 0 03 D1 13 0 12 6 E1 ...

Страница 28: ...l dimensions Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included SOT411 1 98 02 20 02 04 24 0 5 10 mm scale D L L1 L2 E2 E c A4 A5 A2 m L3 E1 Q w M bp 1 d Z e 2 e e 1 23 j DBS23P plastic DIL bent SIL power package 23 leads straight lead length 3 2 mm SOT411 1 v M D x h Eh non concave view B mounting base side B β e1 bp c D 1 E 1 Z 1 d e Dh L L3 m 0 75 0 60 0 55 0 35 30...

Страница 29: ...ed up to the seating plane but the temperature of the plastic body must not exceed the specified maximum storage temperature Tstg max If the printed circuit board has been pre heated forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit 16 2 2 Manual soldering Apply the soldering iron 24 V or less to the lead s of the package either below ...

Страница 30: ...itudinal axis is preferred to be parallel to the transport direction of the printed circuit board smaller than 1 27 mm the footprint longitudinal axis must be parallel to the transport direction of the printed circuit board The footprint must incorporate solder thieves at the downstream end For packages with leads on four sides the footprint must be placed at a 45 angle to the transport direction ...

Страница 31: ...ate between the printed circuit board and the heatsink On versions with the heatsink on the top side the solder might be deposited on the heatsink surface 7 If wave soldering is considered then the package must be placed at a 45 angle to the solder wave direction The package footprint must incorporate solder thieves downstream and at the side corners 8 Wave soldering is suitable for LQFP QFP and T...

Страница 32: ...r 17 Revision history Table 12 Revision history Document ID Release date Data sheet status Change notice Doc number Supersedes TDA8920B_2 20051107 Product data sheet TDA8920B_1 Modifications In Section 9 Limiting values the maximum value for the supply voltage is given for both operating and non operating conditions see Table 5 TDA8920B_1 20041001 Preliminary data sheet 9397 750 13356 ...

Страница 33: ... for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application Right to make changes Philips Semiconductors reserves the right to make changes in the products including circuits standard cells and or software described or contained herein in order to improve design and or performance When the product is in f...

Страница 34: ...ns 8 8 3 1 OverTemperature Protection OTP 8 8 3 2 OverCurrent Protection OCP 8 8 3 3 Window Protection WP 9 8 3 4 Supply voltage protections 10 8 4 Differential audio inputs 11 9 Limiting values 11 10 Thermal characteristics 12 11 Static characteristics 12 12 Dynamic characteristics 13 12 1 Switching characteristics 13 12 2 Stereo and dual SE application 14 12 3 Mono BTL application 15 13 Applicat...

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