TA2092N 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 Weight: 1.2 g (typ.) · Thermal shutdown circuit · Input reference voltage short protection · Operating voltage range: VCC (opr) = 4.0~10.0 V (Ta = 25°C) Block Diagram 1 2001-12-19 TA2092N Terminal Explanation Terminal No. Symbol Function Equivalent Circuit 1 Power GND PW GND ● Connected to substrate. ● pin 1, 12, 13, 24 are connected inside. 2 OUT (−) 1 Inverted output for CH1 3 4 PVCC1 Supply terminal of output stage for CH1 ● Supply terminal of output stage are not connected to other channel terminal. OUT (+) 1 Non-inverted output for CH1 5 VIN1 Input for CH1 ● Not biased inside 6 VRI Input reference voltage ● Under condition of VRI ≤ 1.8 V, internal bias circuit is shut off. ● No signal input condition: VRI = VIN 7 VCI Output reference voltage ● VOUT = VCI = (VCC−VF) /2 8 VIN2 Input for CH2 9 10 OUT (+) 2 Non-inverted output for CH2 PVCC2 11 OUT (−) 2 Inverted output for CH2 12 PW GND Power GND 13 PW GND Power GND 14 OUT (−) 3 Inverted output for CH3 15 16 PVCC3 Same as channel 1 Supply terminal of output stage for CH2 Same as channel 1 Supply terminal of output stage for CH3 OUT (+) 3 Non-inverted output for CH3 17 VIN3 18 S GND Supply terminal of small signal GND ― 19 S VCC Small signal GND ― 20 VIN4 21 22 Input for CH3 Input for CH4 OUT (+) 4 Non-inverted output for CH4 PVCC4 Same as channel 1 Supply terminal of output stage for CH4 23 OUT (−) 4 Inverted output for CH4 24 PW GND Power GND 2 2001-12-19 TA2092N Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Power dissipation Symbol Rating Unit VCC 14 V PD (Note 1) (2) (Note 2) W Operating temperature Topr −30~85 °C Storage temperature Tstg −55~150 °C Note 1: Mounted on 50 mm × 50 mm × 1.6 mm size board with copper area 60 % over. Note 2: Derated above Ta = 25°C, in the proportion of 62.5 mW/°C. Electrical Characteristics (unless otherwise specified, VCC = 5 V, RL = 5 Ω, Rg = 620 Ω, VRI = 2.1 V, f = 1 kHz, Ta = 25°C) Symbol Test Circuit Test Condition Min Typ. Max Unit Operating voltage VCC ― ― 4.0 ― 10.0 V Quiescent current ICCQ ― Vin = 0, RL = OPEN 20 35 60 mA Input offset current IIN ― VIN = 2.1 V ― 250 800 nA VRI terminal offset current I10 ― VRI = 2.1 V ― 35 120 µA VO OS1 ― VCC = 5 V, Rg = 0 Ω −30 ― 30 VO OS2 ― VCC = 8 V, Rg = 0 Ω −50 ― 50 VO OS3 ― VCC = 12 V, Rg = 0 Ω −100 ― 100 VOUT ― ― 2.1 ― VOM1 ― VCC = 5 V 4.0 5.0 ― VOM2 ― VCC = 6 V 5.0 6.0 ― GV ― Vin = 100 mVrms 14.5 15.5 16.5 dB fc ― Vin = 100 mVrms ― 100 ― kHz Total harmonic distortion THD ― Vin = 100 mVrms ― −50 ― dB Slew rate S.R. ― Vout = 2 Vp-p ― 1.0 ― V/µs Cross talk C.T. ― Vout = 1 Vrms ― −60 ― dB Ripple rejection ratio R.R. ― frip = 100 Hz, Vrip = 100 mVrms ― −60 ― dB Thermal shut down temperature TTSD ― Chip temperature ― 150 ― °C VRI OFF ― ― 1.4 1.6 1.8 V Characteristics Output offset voltage Reference output voltage Maximum output voltage Voltage gain Frequency response VRI~GND short protection voltage ― 3 mV V Vp-p 2001-12-19 TA2092N Test Circuit 4 2001-12-19 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 stage. to pre-output · 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 TA2092N Package Dimensions Weight: 1.2 g (typ.) 6 2001-12-19 TA2092N RESTRICTIONS ON PRODUCT USE 000707EBA · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. · The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. · The products described in this document are subject to the foreign exchange and foreign trade laws. · The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. · The information contained herein is subject to change without notice. 7 2001-12-19