ANPEC APA2120, APA2121 Service Manual

APA2069

APA2120/2121

Stereo 2-W Audio Power Amplifier (with DC_Volume Control)

Features

General Description

∙Low operating current with 14mA

∙Improved depop circuitry to eliminate turn-on and turn off transients in outputs

∙High PSRR

∙32 steps volume adjustable by DC voltage with hysteresis

∙2W per channel output power into 4Ω load at 5V, BTL mode

∙Two output modes allowable with BTL and SE modes selected by SE/BTL pin

∙Low current consumption in shutdown mode (50μA)

∙Short Circuit Protection

∙Power off depop circuit integration

∙TSSOP-24 with or without thermal pad package

Applications

∙NoteBook PC

∙LCD Monitor or TV

APA2120/1 is a monolithic integrated circuit, which provides precise DC volume control, and a stereo bridged audio power amplifiers capable of producing 2.7W(2.0W) into 3Ω with less than 10% (1.0%) THD+N. The attenuator range of the volume control in APA2120/1 is from 20dB (DC_Vol=0V) to -80dB (DC_Vol=3.54V) with 32 steps. The advantage of internal gain setting can be less components and PCB area. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in APA2120/1, that reduce pops and clicks noise during power up or shutdown mode operation. It also improves the power off pop noise and protects the chip from being destroyed by over temperature and short current failure. To simplify the audio system design, APA2120/1 combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo single-end (SE) mode for headphone drive into a single chip, where both modes are easily switched by the SE/BTL input control pin signal. Besides, the multiple input selection is used for portable audio system.

Ordering and Marking Information

APA2120/1

Package Code

R : TSSOP-P *

Lead Free Code

Temp. Range

I : - 40 to 85 °C

Handling Code

Handling Code

Temp. Range

TU : Tube

TR : Tape & Reel

TY : Tray

Package Code

Lead Free Code

L : Lead Free Device

Blank : Original Device

APA2120/1 R :

APA2120/1

XXXXX - Date Code

XXXXX

* TSSOP-P is a standard TSSOP package with a thermal pad exposure on the bottom of the package.

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright ã ANPEC Electronics Corp.	1	www.anpec.com.tw
Rev. A.1 - Mar., 2003

APA2120/2121

Block Diagram

LLINEIN		LOUT+
LHPIN	MUX
	Volume	LOUT-
RLINEIN	Control
RHPIN	MUX	LBYPASS
VOLUME		BYPASS
		BYPASS
		ROUT+
HP/LINE	HP/LINE
SE/BTL	SE/BTL	ROUT-
		RBYPASS
SHUTDOWN	Shutdown
	ckt
PCBEEP	PC-BEEP	CLK
		Clock Gen
	ckt

For APA2121

Absolute Maximum Ratings

(Over operating free-air temperature range unless otherwise noted.)

Symbol	Parameter					Rating	Unit
VDD	Supply Voltage Range					-0.3 to 6	V
VIN
	Input Voltage Range, SE/BTL,		HP/LINE,			-0.3 to VDD+0.3	V
	SHUTDOWN, PCBEN
TA	Operating Ambient Temperature Range					-40 to 85	°C
TJ	Maximum Junction Temperature					Intermal Limited*1	°C
TSTG	Storage Temperature Range					-65 to +150	°C
TS	Soldering Temperature,10 seconds					260	°C
VESD	Electrostatic Discharge					-3000 to 3000*2	V
						-200 to 200*3
PD	Power Dissipation					Intermal Limited

Note:

1.APA2120/1 integrated internal thermal shutdown protection when junction temperature ramp up to 150°C 2.Human body model: C=100pF, R=1500W, 3 positives pulse plus 3 negative pulses

3.Machine model: C=200pF, L=0.5mF, 3 positive pulses plus 3 negative pulses

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Rev. A.1 - Mar., 2003

APA2120/2121

Recommended Operating Conditions

Min.

Max.

Unit

Supply Voltage, VDD

4.5

5.5

V

High level threshold voltage, VIH

SHUTDOWN,

PCBEN

2

V

SE/BTL , HP/LINE

4

PCBEN

1.0

Low level threshold voltage, VIL

SHUTDOWN,

V

SE/BTL , HP/LINE

3

Common mode input voltage, VICM

VDD-1.0

V

Thermal Characteristics

Symbol

Parameter

Value

Unit

RTHJA

Thermal Resistance from Junction to Ambient in Free Air

TSSOP-P*

45

°C/W

* 5 in2 printed circuit board with 2oz trace and copper pad through 9 25mil diameter vias. The thermal pad on the TSSOP_P package with solder on the printed circuit board.

Electrical Characteristics

VDD=5V, -20°C<TA<85°C (unless otherwise noted)

Symbol	Parameter					Test Condition		APA2120/1			Unit
								Min.	Typ.	Max.
VDD	Supply Voltage							4.5		5.5	V
									14	25
IDD	Supply Current	SE/BTL=0V									mA
		SE/BTL=5V							8.0	15
ISD	Supply Current in Shutdown	SE/BTL=5V							50		μA
	Mode
		SHUTDOWN=0V
IIH	High input Current								900		nA
IIL	Low Input Current								900		nA
VOS	Output Differential Voltage								5		mV

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APA2120/2121

Electrical Characteristics (Cont.)

Operating Characteristics, BTL mode

VDD=5V,TA=25°C,RL=4Ω, Gain=2V/V (unless otherwise noted)

	Symbol	Parameter	Test Condition	APA2120/1			Unit
				Min.	Typ.	Max.
			THD=10%, RL=3Ω, Fin=1kHz		2.7
			THD=10%, RL=4Ω, Fin=1kHz		2.3
	PO	Maximum Output Power	THD=10%, RL=8Ω, Fin=1kHz		1.5		W
			THD=1%, RL=3Ω, Fin=1kHz		2.0
			THD=1%, RL=4Ω, Fin=1kHz		1.9
			THD=0.5%, RL=8Ω, Fin=1kHz	1	1.1
	THD+N	Total Harmonic Distortion Plus	PO=1.5W, RL=4Ω, Fin=1kHz		0.05		%
		Noise	PO=1W, RL=8Ω, Fin=1kHz		0.07
	PSRR	Power Ripple Rejection Ratio	VIN=0.1Vrms, RL=8Ω, CB=1μF,		60		dB
			Fin=120Hz
	Xtalk	Channel Separation	CB=1μF, RL=8Ω, Fin=1kHz		90		dB
	S/N	Signal to Noise Ratio	PO=1.1W, RL=8Ω, A_wieght		95		dB

Operating Characteristics, SE mode

VDD=5V,TA=25°C,RL=4Ω, Gain=1V/V (unless otherwise noted)

	Symbol	Parameter	Test Condition	APA2120/1			Unit
				Min.	Typ.	Max.
			THD=10%, RL=8Ω, Fin=1kHz		400
	PO	Maximum Output Power	THD=10%, RL=32Ω, Fin=1kHz		110		mW
			THD=1%, RL=8Ω, Fin=1kHz		320
			THD=1%, RL=32Ω, Fin=1kHz		90
	THD+N	Total Harmonic Distortion Plus	PO=250mW, RL=8Ω, Fin=1kHz		0.08		%
		Noise	Ω		0.08
			PO=75mW, RL=32 , Fin=1kHz
	PSRR	Power Ripple Rejection Ratio	VIN=0.1Vrms, RL=8Ω, CB=1μF,		48		dB
			Fin=120Hz
	Xtalk	Channel Separation	CB=1μF, RL=32Ω, Fin=1kHz		100		dB
	S/N	Signal to Noise Ratio	PO=75mW, SE, RL=32Ω, A_wieght		100		dB

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APA2120/2121

Pin Description

					1		24				GND
GND
					2
PCBEN							23				RLINEIN
VOLUME					3		22					SHUTDOWN
LOUT+					4		21				ROUT+
LLINEIN					5		20				RHPIN
LHPIN					6	APA2120	19				VDD
PVDD					7	TOP View	18				PVDD
RBYPASS					8		17				CLK
LOUT-					9		16				ROUT-
LBYPASS					10		15				SE/BTL
BYPASS											PC-BEEP
					11		14
GND					12		13				GND

Thermal

Pad

							1		24				GND
	GND
							2
									23				RLINEIN
HP/LINE
VOLUME							3		22					SHUTDOWN
LOUT+							4		21				ROUT+
LLINEIN							5		20				RHPIN
LHPIN							6	APA2121	19				VDD
PVDD							7	TOP View	18				PVDD
RBYPASS							8		17				CLK
LOUT-							9		16				ROUT-
LBYPASS							10		15				SE/BTL
BYPASS													PC-BEEP
							11		14
	GND						12		13				GND

APA2120/1

Bottom View

	Multiple Input Selection	PCBEEP Control Input
APA2120	SE/BTL	PCBEN
APA2121	HP/LINE	-

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Rev. A.1 - Mar., 2003

APA2120/2121

Pin Function Description

Pin

Config.

Description

Name

No

GND

1,12,

Ground connection, Connected to thermal pad.

13,24

PCBEN

2

I/P

BEEP mode control input, active H, for APA2120 only

Multi-input selection input, headphone mode when held high, line-in

HP/LINE

2

I/P

mode when held low for APA2121 only.

VOLUME

3

Input signal for internal volume gain setting.

LOUT+

4

O/P

Left channel positive output in BTL mode and SE mode.

LLINEIN

5

I/P

is held low.

Left channel line input terminal, selected when HP/LINE

is

LHPIN

6

O/P

Left channel headphone input terminal, selected when HP/LINE

held high.

PVDD

7,18

Supply voltage only for power amplifier.

RBYPASS

8

I/P

Right channel bypass voltage.

LOUT-

9

O/P

Left channel negative output in BTL mode and high impedance in

SE mode.

LBYPASS

10

I/P

Left channel bias voltage generator.

BYPASS

11

Bias voltage generator

PC_BEEP

14

I/P

PCBEP signal input

Output mode control input, high for SE output mode and low for

SE/BTL

15

I/P

BTL mode.

ROUT-

16

O/P

Right channel negative output in BTL mode and high impedance in

SE mode.

CLK

17

Clock signal generator

VDD

19

Supply voltage for internal circuit excepting power amplifier.

is

RHPIN

20

I/P

Right channel headphone input terminal, selected when HP/LINE

held high.

ROUT+

21

O/P

Right channel positive output in BTL mode and SE mode.

SHUTDOWN

22

I/P

It will be into shutdown mode when pull low.

is held

RLINEIN

23

I/P

Right channel line input terminal, selected when HP/LINE

low.

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APA2120/2121

Control Input Table

For APA2120

SE/BTL

SHUTDOWN

PC-BEEP

Operating mode

X

L

Disable

Shutdown mode

L

H

Disable

Line input, BTL out

H

H

Disable

HP input, SE out

X

X

Enable

PCBEEP input, BTL out

For APA2121

SE/BTL

HP/LINE

SHUTDOWN

PC-BEEP

Operating mode

X

X

L

Disable

Shutdown mode

L

L

H

Disable

Line input, BTL out

L

H

H

Disable

HP input, BTL out

H

L

H

Disable

Line input, SE out

H

H

H

Disable

HP input, BTL out

X

X

X

Enable

PCBEEP input, BTL out

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Rev. A.1 - Mar., 2003

APA2120/2121
Typical Application Circuit
APA2120
					VDD	0Ω
					0.1μF	100μF
				VDD	GND	PVDD
		1μF	LLINEIN			LOUT+
L-LINE
			LHPIN	MUX			220μF
	1μF						1kΩ
L-HP
						4Ω	Control
				Volume		LOUT-
		1μF					Pin	Ring
			RLINEIN	Control
R-LINE
			RHPIN	MUX		LBYPASS	SE/BTL
	1μF	VDD				2.2μF
R-HP						BYPASS		Sleeve
								Tip
						BYPASS
							Headphone Jack
	50kΩ		VOLUME			ROUT+
							220μF
							1kΩ
		VDD
	100kΩ	100kΩ SE/BTL				4Ω
				SE/BTL		ROUT-
						RBYPASS
	Shutdown		SHUTDOWN	Shutdown
	Signal			ckt
		0.47μF
	BEEP		PCBEEP			CLK
	Signal			PC-BEEP		Clock Gen
	PCBEN		PCBEN	ckt		47nF
		Signal

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Rev. A.1 - Mar., 2003

APA2120/2121
Typical Application Circuit
APA2121
			VDD	0Ω
			0.1μF	100μF
		VDD	GND	PVDD
	1μF			LOUT+
L-LINE	LLINEIN
	LHPIN	MUX			220μF
1μF					1kΩ
L-HP
				4Ω	Control
		Volume		LOUT-
	1μF				Pin	Ring
		Control
R-LINE	RLINEIN
	RHPIN	MUX		LBYPASS	SE/BTL
1μF	VDD			2.2μF
						Sleeve
R-HP				BYPASS
						Tip
				BYPASS
	VOLUME				Headphone Jack
				ROUT+
	50kΩ
					220μF
HP/LINE	HP/LINE				1kΩ
		HP/LINE
Signal	VDD
100kΩ				4Ω
	100kΩ SE/BTL	SE/BTL		ROUT-
				RBYPASS
Shutdown	SHUTDOWN	Shutdown
Signal		ckt
BEEP	PCBEEP	PC-BEEP		CLK
Signal		ckt		Clock Gen
	0.47μF			47nF

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Rev. A.1 - Mar., 2003

APA2120/2121

Volume Control Table_BTL Mode

Supply Voltage Vdd=5V

Gain(dB)	High(V)	Low(V)	Hysteresis(mV)	Recommended Voltage(V)
20	0.12	0.00		0
18	0.23	0.17	52	0.20
16	0.34	0.28	51	0.31
14	0.46	0.39	50	0.43
12	0.57	0.51	49	0.54
10	0.69	0.62	47	0.65
8	0.80	0.73	46	0.77
6	0.91	0.84	45	0.88
4	1.03	0.96	44	0.99
2	1.14	1.07	43	1.10
0	1.25	1.18	41	1.22
-2	1.37	1.29	40	1.33
-4	1.48	1.41	39	1.44
-6	1.59	1.52	38	1.56
-8	1.71	1.63	37	1.67
-10	1.82	1.74	35	1.78
-12	1.93	1.85	34	1.89
-14	2.05	1.97	33	2.01
-16	2.16	2.08	32	2.12
-18	2.28	2.19	30	2.23
-20	2.39	2.30	29	2.35
-22	2.50	2.42	28	2.46
-24	2.62	2.53	27	2.57
-26	2.73	2.64	26	2.69
-28	2.84	2.75	24	2.80
-30	2.96	2.87	23	2.91
-32	3.07	2.98	22	3.02
-34	3.18	3.09	21	3.14
-36	3.30	3.20	20	3.25
-38	3.41	3.32	18	3.36
-40	3.52	3.43	17	3.48
-80	5.00	3.54	16	5

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