LV4985VH_0912 SANYO [Sanyo Semicon Device], LV4985VH_0912 Datasheet

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LV4985VH_0912

Manufacturer Part Number
LV4985VH_0912
Description
For Portable Electronic Device Use 1.2W x 2ch BTL Power Amplifier
Manufacturer
SANYO [Sanyo Semicon Device]
Datasheet
1.LV4985VH_0912.pdf (15 pages)
Ordering number : ENA1568A
LV4985VH
Overview
Applications
Features
The LV4985VH has a 2-channel power circuit amplifier including an electronic volume control built in. It has a function
for switching the headphone driver and also has a standby function to reduce the current drain. It is a power amplifier IC
optimal for driving the speakers used in portable equipment and low power output equipment.
Portable DVD players, active speakers, compact LCD-TVs/LCD monitors, notebook PCs and more.
• 2-cannels BTL power amplifier built-in : Standard output power = 1.2W (V CC = 5V, R L = 8Ω, THD = 10%)
• Volume function built-in (variable range: 69dB standard), DC voltage control system
• Mute function built-in (shared with VOL-min)
• Standby function built-in (three-value control ⇒ Shared with the second amplifier stop control pin) :
• Second amplifier stop control function built-in (three-value control ⇒ Shared with the standby pin) :
• Thermal protection circuit built-in
• Operation supply voltage range : V CC = 4.5V to 5.5V
• Output phase compensation capacitor not necessary
Standard standby current = 0.01μA (V CC = 5V)
Headphone driver switch (for BTL/SE switch)
Simple MUTE (Only BTL power amplifier path)
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
device, the customer should always evaluate and test devices mounted in the customer
equipment.
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
Bi-CMOS IC
For Portable Electronic Device Use
1.2W × 2ch BTL Power Amplifier
Output coupling capacitor is unnecessary because of differential output type.
D1609 SY / O1409 SY PC 20090914-S00001 No.A1568-1/15
'
s products or

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LV4985VH_0912 Summary of contents

Page 1

Ordering number : ENA1568A LV4985VH Overview The LV4985VH has a 2-channel power circuit amplifier including an electronic volume control built in. It has a function for switching the headphone driver and also has a standby function to reduce the current ...

Page 2

Specifications Maximum Ratings 25°C Parameter Symbol Maximum supply voltage V CC max Allowable power dissipation Pd max Maximum junction temperature Tj max Operating temperature Topr Storage temperature Tstg * Specified board (SANYO Semiconductor Evaluation board) : 50mm ...

Page 3

Package Dimensions unit : mm (typ) 3313 6 0.22 0.15 1.3 0.65 (2.35) 1.5 SANYO : HSSOP14(225mil) LV4985VH 1.6 SANYO evaluation board (double-sided) : 1.45 1.2 0.8 Independent IC 0.4 0. Ambient ...

Page 4

Block Diagram GND OUT2-2 OUT2-1 14 TSD 1 GND OUT1-2 OUT1-1 Test Circuit LV4985VH PIN2 VLOUT2 VOL 1st-amp - + + - 1st-amp PIN1 VLOUT1 Vvol ...

Page 5

Evaluation Board Circuit OUT2-2 OUT2-1 SE2 14 OUT1-2 OUT1-1 SE1 GND Evaluation Board Layout Top Layer LV4985VH 100μF + 100kΩ 18kΩ 0.33μ 100kΩ 18kΩ + 100μF + 0.1μ (50mm × 50mm ...

Page 6

Application Circuit Example 1 (BTL mode only) Speaker 14 1 Speaker Application Circuit Example 2 (BTL mode/SE mode changeover) R10 C10 33Ω 100μF R12 1KΩ R11 1KΩ 33Ω 100μF LV4985VH 100kΩ 18kΩ C4 0.33μF ...

Page 7

Pin Functions Pin Voltage Pin No. Pin Name OUT1-2 2.49 14 OUT2-2 2 OUT1-1 2.49 13 OUT2 5.0 4 PIN1 2.49 12 PIN2 5 VLOUT1 2.49 11 VLOUT2 6 VREF 2.49 7 ...

Page 8

Continued from preceding page. Pin Voltage Pin No. Pin Name STBY External apply 10 VOL External apply Usage Note 1. Input coupling capacitor (C1 and C2) C1 (C2 input coupling capacitor that is ...

Page 9

This capacitor is a ripple filter capacitor. The internal resistors (600kΩ + 50kΩ) and C5 make up a low-pass filter that is used to reduce the power supply ripple component and increase the ripple rejection ...

Page 10

Electronic volume control (pin 10 control) By changing voltage applied to the pin 10, the voltage gain of the built-in VCA(variable control amplifier) is varied. Since the ripple component of applied voltage is generated, a stabilized power source must ...

Page 11

THD -- P O 100 0 0.01 0.1 1 Output power ...

Page 12

CHsep -- fin 10k 10 100 Input frequency, fin -- Hz I CCO -- load No signal 12 ...

Page 13

SVRR -- VOL-MIN VOL-MAX 30 20 --30 --20 -- Ambient temperature --30 --20 -- ...

Page 14

V9cnt -- V10 = 3V SE mode 0.9 0.8 0.7 0.6 --30 --20 -- Ambient temperature °C I CCO ...

Page 15

Rising (V9 ⇒ high) characteristics Load end : 50mV/div First output pin : 1V/div Pin 9 : 5V/div •Transient response characteristics (volume mute. setting) Rising (V9 ⇒ high) characteristics Load end : 50mV/div First ...

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