Sanyo LA4635A Specifications

Ordering number: ENN6983

Monolithic Linear IC

LA4635A

For General Audio Use

2-Channel BTL AF Power Amplifier

Overview

Package Dimensions

The LA4635A is a 2-channel power IC that is pin-compat- ible with the LA4636. It represents a new concept in devices of this type by allowing design editing based on common circuit board pin compatibility for products of different power ranks. It is compatible with VCC = 9 V and VCC = 12 V specifications and is available in two versions with different voltage gains (LA4635A with VG = 35 dB and LA4635B with VG = 45 dB).

Specifications

Maximum Ratings at Ta = 25° C

unit: mm

3049B-SIP12H
				[LA4635A]
			26.8			4.0
			(20.0)
(8.4)	7.0			(R1.7)	(11.8)	13.2max
					1.0min	6.0
		1		12
	(2.4)	2.0	0.5	1.0		0.4
						2.0
					SANYO: SIP12H

Parameter	Symbol	Conditions	Ratings	Unit
Maximum supply voltage	VCC max	No signal	24	V
Maximum output current	Io peak	Per channel	2.5	A
Allowable power dissipation	Pd max	Infinite heat sink	25	W
Operating temperature	Topr		–20 to +75	° C
Storage temperature	Tstg		–40 to +150	° C

Operating Conditions at Ta = 25° C

Parameter	Symbol	Conditions	Ratings	Unit
Recommended supply voltage	VCC		12	V
Recommended load resistance	RL op		3 to 8	Ω
Allowable operating voltage range	VCC op		5.5 to 22	V

* Set VCC, RL, and output level such that Pd max. is not exceeded for the size of heat sink used.

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

70102RM (II) No. 6983-1/3

LA4635A

Operating Characteristics at Ta = 25° C, VCC = 12 V, RL = 3 Ω , f = 1 kHz, Rg = 600 Ω

Parameter	Symbol	Conditions		Ratings
			min	typ	max	Unit
Quiescent current	ICCO	Rg = 0	18	35	80	mA
Standby current	Ist			1	10	µ A
Voltage gain	VG	VO = 0 dBm	33	35	37	dB
Total harmonic distortion	THD	PO = 1 W		0.15	0.4	%
Output power	PO1	THD = 10%	3.0	4.5		W
	PO2	VCC = 9 V, THD = 10%	2.0	2.5		W
Output noise voltage	VNO	Rg = 0, BPF = 20 Hz to 20 kHz		0.05	0.25	mV
Ripple rejection	SVRR	Rg = 0, fR = 100 Hz, VR = 0 dBm	50	60		dB
Channel separation	CH Sep	Rg = 10 kΩ , VO = 0 dBm	55	65		dB
Input resistance	Ri		20	30	40	kΩ
Standby pin voltage	VST	Amplifier on (pin 5 voltage)	1.5	5.0		V

Sample Application Circuit

(Ripple Filter)

DC

	1
100 F 16V		+		50V
			1 F

IN1

2

+

PRE

GND

3

1 F

50V

IN2

4

+

LA4635A

(Popping Noise

PWR

Eliminator)

STBY

P.P

VCC

OUT2

NC

GND

NC

OUT1

5

6

7

8

9

10

11

12

Top view

RX

4.7 F

16V

+

1000 F

16V

+

1000 F

16V

+

L

L

R

R

5V

F

+

1000 25V

ILA00778

VCC

* If voltage is to be applied to the Standby pin (pin 5), a resistor (Rx) should be inserted to limit the inflow current, as required. Please refer to the information below.

(Reference) Pin 5 Equivalent Circuit Inside IC

					Rx	Ix			R2
							STBY		2kΩ
							5
	Standby		+
Pin Voltage								Ω
								R1 2k
	Vx			Ix=max 4.5mA
									ILA00779
	30				Pd max -- Ta
– W			Infinite heat sink					AI heat sink
								Mounting
max	25							torque 39N• cm
								Flat washer
								Silicone grease
Pd
								applied
	20
dissipation,									qjc=3° C / W
	15	100 ¥ 100 ¥ 1.5 mm3
	12.5
power	10	50 ¥ 50 ¥ 1.5 mm3
	7
Allowable
	5	Single IC
	3.2
	0
	--20		0	20	40	60	80	100	120	140	160

Ambient temperature, Ta – ° C

ILA00777

•The amplifier can be turned on and off by controlling the level (high/low) of pin 5.

•Applying a signal equal or greater than 1.5 V and

800 µ A to pin 5 turns on the amplifier. (If 5 V is applied directly to pin 5 the inflow current of pin 5 is approximately 4.5 mA.)

•If a voltage, Vx, exceeding 5 V is to be applied, current limiting resistor (Rx) should be inserted to limit the inflow current to 4.5 mA. (See following equation.)

Rx = (Vx – 5 V) / 4.5 mA

• If pin 5 is to be controlled by the microprocessor, the pin 5 inflow current (Ix) should be optimized for the capacity of the microprocessor by calculating Rx using the following equation, as a general guideline, and then confirming the inflow current through actual measurement.

Rx = (Vx / Ix) – R1 (2 Ωk )

Note: The LA4635A is basically pin-compatible with the LA4636, but there are partial differences in operation and usage, including with regard to externally connected parts.

No. 6983-2/3