Datenblatt-Suchmaschine für elektronische Bauteile |
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TA2092AN Datenblatt(PDF) 5 Page - Toshiba Semiconductor |
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TA2092AN Datenblatt(HTML) 5 Page - Toshiba Semiconductor |
5 / 7 page TA2092AN 2001-08-28 5 Precaution Use · Input stage · Input stages are consisted of differential circuit of PNP Tr, and have built-in base current 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 1.1 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 47 to 100 µF between VRI terminal and GND. · VCI terminal is recommend to use “OPEN”. |
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