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SA58670A_2

Product data sheet

Rev. 02 — 23 October 2008

2 of 24

NXP Semiconductors

SA58670A

2.1 W/channel stereo class-D audio amplifier

Educational toy

Ordering information

Block diagram

Table 1.

Ordering information

Type number

Package

Name

Description

Version

SA58670ABS

HVQFN20

plastic thermal enhanced very thin quad flat package;
no leads; 20 terminals; body 4

0.85 mm

SOT917-1

Refer to

Table 6

for gain selection.

Fig 1.

Block diagram

002aad663

SA58670A

SDR

INRP

INRN

GAIN

ADJUST

6, 10

n.c.

right input

PWM

H-

BRIDGE

OUTRP

3, 13 PVDD

OUTRN

9 AVDD

4, 12

PGND

AGND

INTERNAL

OSCILLATOR

INLP

INLN

GAIN

ADJUST

left input

PWM

H-

BRIDGE

OUTLP

OUTLN

1
8

300 k

Ω

SDL

300 k

Ω

BIAS

CIRCUITRY

GND

SHORT-CIRCUIT

PROTECTION

Содержание SA58670A

Страница 1: ...iency is excellent at 70 to 74 into 4 Ω and 84 to 88 into 8 Ω The SA58670A provides thermal and short circuit shutdown protection 2 Features n Output power u 2 1 W channel into 4 Ω at 5 0 V u 1 4 W channel into 8 Ω at 5 0 V u 720 mW channel into 8 Ω at 3 6 V n Supply voltage 2 5 V to 5 5 V n Independent shutdown control for each channel n Selectable gain 6 dB 12 dB 18 dB and 24 dB n High SVRR 77 d...

Страница 2: ...ersion SA58670ABS HVQFN20 plastic thermal enhanced very thin quad flat package no leads 20 terminals body 4 4 0 85 mm SOT917 1 Refer to Table 6 for gain selection Fig 1 Block diagram 002aad663 SA58670A SDR 16 17 INRP INRN GAIN ADJUST 6 10 n c right input PWM H BRIDGE 14 11 OUTRP 3 13 PVDD OUTRN VDD 9 AVDD VDD 4 12 PGND 18 AGND INTERNAL OSCILLATOR 20 19 INLP INLN GAIN ADJUST left input PWM H BRIDGE...

Страница 3: ...nal 1 index area DAP 1 Table 2 Pin description Symbol Pin Description G1 1 gain select input 1 OUTLP 2 left channel positive output PVDD 3 power supply voltage level same as AVDD PGND 4 power ground OUTLN 5 left channel negative output n c 6 not connected SDL 7 left channel shutdown input active LOW SDR 8 right channel shutdown input active LOW AVDD 9 analog supply voltage level same as PVDD n c 1...

Страница 4: ...ble 2 Pin description continued Symbol Pin Description Table 3 Limiting values In accordance with the Absolute Maximum Rating System IEC 60134 1 Symbol Parameter Conditions Min Max Unit VDD supply voltage Active mode 0 3 6 0 V Shutdown mode 0 3 7 0 V VI input voltage pin SDL GND VDD V pin SDR GND VDD V other pins 0 3 VDD 0 3 V P power dissipation derating factor 41 6 mW K Tamb 25 C 5 2 W Tamb 75 C...

Страница 5: ... cm common mode input voltage 0 5 VDD 0 8 V CMRR common mode rejection ratio inputs are shorted together VDD 2 5 V to 5 5 V 69 50 dB VIH HIGH level input voltage VDD 2 5 V to 5 5 V pins SDL SDR G0 G1 1 3 VDD V VIL LOW level input voltage VDD 2 5 V to 5 5 V pins SDL SDR G0 G1 0 0 35 V IIH HIGH level input current VDD 5 5 V VI VDD 50 µA IIL LOW level input current VDD 5 5 V VI 0 V 5 µA fsw switching...

Страница 6: ... N 10 RL 8 Ω VDD 3 6 V 0 72 W RL 8 Ω VDD 5 0 V 1 4 W RL 4 Ω VDD 5 0 V 2 1 W THD N total harmonic distortion plus noise VDD 5 0 V Gv cl 6 dB f 1 kHz Po 0 5 W 0 11 Po 1 0 W 0 14 SVRR supply voltage ripple rejection Gv cl 6 dB f 217 Hz VDD 3 6 V 73 dB VDD 5 0 V 77 dB CMRR common mode rejection ratio VDD 5 0 V Gv cl 6 dB f 217 Hz 69 dB Zi input impedance Gv cl 6 dB 28 1 kΩ Gv cl 12 dB 17 3 kΩ Gv cl 18...

Страница 7: ...D audio amplifier 10 Typical performance curves a Gv cl 24 dB b Gv cl 6 dB fi 1 kHz 1 VDD 2 5 V 2 VDD 3 6 V 3 VDD 5 0 V Fig 3 Total harmonic distortion plus noise as a function of output power RL 8 Ω 001aah484 Po W 10 5 10 1 10 1 10 4 10 2 10 3 10 1 1 10 102 10 2 THD N 1 2 3 001aah485 Po W 10 5 10 1 10 1 10 4 10 2 10 3 10 1 1 10 102 10 2 THD N 1 2 3 ...

Страница 8: ...l stereo class D audio amplifier a Gv cl 24 dB b Gv cl 6 dB fi 1 kHz 1 VDD 2 5 V 2 VDD 3 6 V 3 VDD 5 0 V Fig 4 Total harmonic distortion plus noise as a function of output power RL 4 Ω 001aah486 Po W 10 5 10 1 10 1 10 4 10 2 10 3 10 1 1 10 102 10 2 THD N 1 2 3 001aah487 Po W 10 5 10 1 10 1 10 4 10 2 10 3 10 1 1 10 102 10 2 THD N 1 2 3 ...

Страница 9: ...Vi 590 mV RMS 2 Po 240 mW Vi 490 mV RMS 3 Po 120 mW Vi 346 mV RMS a RL 4 Ω 1 Po 260 mW Vi 721 1 mV RMS 2 Po 180 mW Vi 600 mV RMS 3 Po 90 mW Vi 424 3 mV RMS b RL 8 Ω Gv cl 6 dB Fig 5 Total harmonic distortion plus noise as a function of frequency VDD 2 5 V 001aah488 f Hz 10 105 104 102 103 10 1 10 2 1 10 3 THD N 1 2 3 001aah489 f Hz 10 105 104 102 103 10 1 10 2 1 10 3 THD N 1 2 3 ...

Страница 10: ...908 3 mV RMS 2 Po 550 mW Vi 741 6 mV RMS 3 Po 275 mW Vi 524 4 mV RMS a RL 4 Ω 1 Po 560 mW Vi 1 058 V RMS 2 Po 375 mW Vi 866 mV RMS 3 Po 190 mW Vi 616 4 mV RMS b RL 8 Ω Gv cl 6 dB Fig 6 Total harmonic distortion plus noise as a function of frequency VDD 3 6 V 001aah490 f Hz 10 105 104 102 103 10 1 10 2 1 10 3 THD N 1 2 3 001aah491 f Hz 10 105 104 102 103 10 1 10 2 1 10 3 THD N 1 2 3 ...

Страница 11: ...1 285 V RMS 2 Po 1 1 W Vi 1 05 V RMS 3 Po 550 mW Vi 741 6 mV RMS a RL 4 Ω 1 Po 1 16 W Vi 1 523 V RMS 2 Po 775 mW Vi 1 245 V RMS 3 Po 380 mW Vi 871 8 mV RMS b RL 8 Ω Gv cl 6 dB Fig 7 Total harmonic distortion plus noise as a function of frequency VDD 5 0 V 001aah492 f Hz 10 105 104 102 103 10 1 10 2 1 10 3 THD N 1 2 3 001aah493 f Hz 10 105 104 102 103 10 2 10 1 1 10 10 3 THD N 1 2 3 ...

Страница 12: ...to R channel 2 VDD 3 6 V R channel to L channel 3 VDD 5 0 V L channel to R channel 4 VDD 5 0 V R channel to L channel Fig 8 Crosstalk stepped all to one as a function of frequency 1 Left channel 2 Right channel Fig 9 Noise output voltage RMS value as a function of frequency 001aah495 f Hz 103 105 104 100 80 60 αct dB 120 3 2 1 4 f Hz 104 10 4 10 5 10 3 10 6 Vn o V 102 10 103 1 2 001aah497 ...

Страница 13: ...ductors SA58670A 2 1 W channel stereo class D audio amplifier a RL 4 Ω b RL 8 Ω 1 VDD 2 5 V 2 VDD 3 6 V 3 VDD 5 0 V Fig 10 Crosstalk one to one as a function of frequency f kHz 2 20 001aah505 100 80 60 120 8 14 4 6 10 12 16 18 αct dB 2 1 3 f kHz 2 20 001aah506 100 80 60 αct dB 120 8 14 4 6 10 12 16 18 2 3 1 ...

Страница 14: ...ltage as a function of shutdown voltage Fig 12 Supply current as a function of supply voltage VSDR VSDL V 0 3 2 1 001aah507 2 4 6 VDD V 0 2 5 V 3 6 V 5 V VDD V 2 5 5 5 4 5 3 5 001aah508 3 5 4 5 5 5 IDD mA 2 5 1 2 3 a RL 4 Ω b RL 8 Ω 1 VDD 2 5 V 2 VDD 3 6 V 3 VDD 5 0 V Fig 13 Supply current as a function of output power 0 1200 800 400 1600 IDD mA Po W 0 2 0 1 6 0 8 1 2 0 4 001aah509 1 2 3 0 600 400...

Страница 15: ... Fig 14 Power dissipation as a function of output power 0 0 6 0 4 0 2 0 8 P W Po W 0 2 0 1 6 0 8 1 2 0 4 001aah511 1 3 2 0 0 3 0 2 0 1 0 4 P W Po W 0 1 6 1 2 0 4 0 8 001aah512 1 3 2 a RL 4 Ω b RL 8 Ω 1 VDD 5 0 V 2 VDD 3 6 V 3 VDD 2 5 V Fig 15 Output power efficiency as a function of output power 40 60 20 80 100 ηpo 0 Po W 0 2 0 1 6 0 8 1 2 0 4 001aah513 1 3 2 40 60 20 80 100 ηpo 0 Po W 0 1 6 1 2 0...

Страница 16: ...ional decoupling using a larger capacitor 4 7 µF or greater may be done on the supply voltage connection on the PCB to filter low frequency signals Usually this is not required due to high PSRR of the SA58670A 11 2 Input capacitor selection The SA58670A does not require input coupling capacitors when used with a differential audio source that is biased from 0 5 V to VDD 0 8 V In other words the in...

Страница 17: ...ciency The trace width and routing are also very important for power output and noise considerations For high current pins PVDD PGND and audio output the trace widths should be maximized to ensure proper performance and output power Use at least 500 µm wide traces For the input pins INRP INRN INLP and INLN the traces must be symmetrical and run side by side to maximize common mode cancellation 11 ...

Страница 18: ...maximum power dissipation for 5 V supply and 4 Ω load If the junction temperature of the SA58670A rises above 150 C the thermal protection circuitry turns the SA58670A off this prevents damage to IC Using speakers greater than 4 Ω further enhances thermal performance and battery lifetime by reducing the output load current and increasing amplifier efficiency 11 6 Additional thermal information The...

Страница 19: ...3 9 Dh 2 45 2 15 y1 4 1 3 9 2 45 2 15 e1 2 e2 2 0 30 0 18 0 05 0 00 0 05 0 1 DIMENSIONS mm are the original dimensions SOT917 1 MO 220 0 6 0 4 L 0 1 v 0 05 w 0 2 5 5 mm scale SOT917 1 HVQFN20 plastic thermal enhanced very thin quad flat package no leads 20 terminals body 4 x 4 x 0 85 mm A 1 max 05 10 08 05 10 31 E 1 D 1 Note 1 Plastic or metal protrusions of 0 075 mm maximum per side are not inclu...

Страница 20: ...f liquid solder The wave soldering process is suitable for the following Through hole components Leaded or leadless SMDs which are glued to the surface of the printed circuit board Not all SMDs can be wave soldered Packages with solder balls and some leadless packages which have solder lands underneath the body cannot be wave soldered Also leaded SMDs with leads having a pitch smaller than 0 6 mm ...

Страница 21: ...ooling down It is imperative that the peak temperature is high enough for the solder to make reliable solder joints a solder paste characteristic In addition the peak temperature must be low enough that the packages and or boards are not damaged The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 7 and 8 Moisture sensitivity precau...

Страница 22: ...rature minimum soldering temperature maximum peak temperature MSL limit damage level peak temperature Table 9 Abbreviations Acronym Description DAP Die Attach Paddle DVD Digital Video Disc EMI ElectroMagnetic Interference ESR Equivalent Series Resistance LC inductor capacitor filter PC Personal Computer PCB Printed Circuit Board PDA Personal Digital Assistant PWM Pulse Width Modulator USB Universa...

Страница 23: ...ipment nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applic...

Страница 24: ...in description 3 7 Limiting values 4 8 Static characteristics 5 9 Dynamic characteristics 6 10 Typical performance curves 7 11 Application information 16 11 1 Power supply decoupling considerations 16 11 2 Input capacitor selection 16 11 3 PCB layout considerations 17 11 4 Filter free operation and ferrite bead filters 17 11 5 Efficiency and thermal considerations 18 11 6 Additional thermal inform...

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