TA2092N Ver la hoja de datos (PDF) - Toshiba

Número de pieza

componentes Descripción

Fabricante

TA2092N

Power Driver IC for CD Player

Toshiba 

TA2092N

Precaution Use

· Input stage

· Input stages are consisted of differential circuit of NPN Tr, and have built-in IB compensation circuit.

· Built-in driver

· Each channel driver consists of BTL configuration linear amplifier.

Voltage gain is fixed: GV = 15.5dB (typ.)

Voltage loss for output stage is 2 VBE = VCE (sat) for positive cycle, VCE (sat) for negative cycle, because of

no-bootstrap circuit. So, output DC voltage is designed as less than 1/2 VCC.

· VRI terminal

· VRI is reference voltage terminal for input signal.

If reference voltage from servo IC drop less than 1.8 V, protection circuit operates and shut off bias circuit

inside. This operation is to prevent load from moving undesireably in case of VRI drop for accident or some

reason.

· VCI terminal

· Output DC voltage is determined by circuit of this terminal inside as;

VCI = VOUT (DC) = (VCC−VF) /2

· Output signal dynamic range is depend on VCC. On the other hand, input signal dynamic range is determined

by VRI as mentioned and voltage gain is fixed inside. So, maximum output voltage does not increase as VCC

increases.

· Because of BTL configuration, Ripple Rejection Ratio does not improve not much when capacitor is connected

to VCI terminal to GND.

· GND

· Large signal GND is for output stage and small signal GND is for stages from input circuit to pre-output

stage.

· These GND pins are not connected inside.

· The heat of power dissipation is transferred to PCB, through these PW-GND Pin, because, 1, 12, 13, 24 pin

are connected each other and to substrate of Pellet to connected copper foil area as large as possible.

· Oscillation preventive capacitor

· We recommend to use the capacitor of 0.1 µF, between each output terminals. But perform the temperature

test to check the oscillation allowance, since the oscillation allowance is varied according to the causes

described below.

1) Supply voltage

2) Ambient temperature

3) Load impedance

4) Capacity value of condenser

5) Kind of condenser

6) Layout of Printed board

· We recommend to connect Pass-condenser, which is about 10 to 100 µF between VRI terminal and GND.

· VCI terminal is recommend to use “OPEN”.

5

2001-12-19

Share Link: