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PDF TA2092N Data sheet ( Hoja de datos )
| Número de pieza | TA2092N | |
| Descripción | POWER DRIVER IC FOR CD PLAYER | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2092N
Power Driver IC for CD Player
The TA2092N is a power driver IC developed for CD players.
This IC have built-in 4 channel BTL power amplifiers which
drives focus-coil, tracking-coil for 3-beam pick-up head, disc
motor and feed motor.
Features
· 4 channel BTL linear drivers
· Fixed voltage gain: GV = 15dB (typ.)
· High output power
: VOM1 = 5 Vp-p (typ.) @VCC = 5 V, RL = 5 Ω
: VOM2 = 6 Vp-p (typ.) @VCC = 6 V, RL = 5 Ω
· Thermal shutdown circuit
· Input reference voltage short protection
· Operating voltage range: VCC (opr) = 4.0~10.0 V (Ta = 25°C)
Block Diagram
Weight: 1.2 g (typ.)
TA2092N
1 2001-12-19
1 page  
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
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet TA2092N.PDF ] | |
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