BA5962FVM Optical disc ICs Power driver for CD player BA5962FVM BA5962FVM is 1ch BTL power driver IC for CD / DVD. MSOP8 package enables the smallest configuration. This IC enables reduction of external parts, built-in level shift circuit. !Applications CD player !Features 1) 1ch BTL driver for CD / DVD. 2) MSOP8 package enables the smallest configuration. 3) Built in level shift circuit. 4) Built in thermal-shut-down circuit. !Absolute maximum ratings (Ta=25°C) Parameter Symbol Limits Unit Power supply voltage VCC 18 V Power dissipation Pd 0.55 W Operating temperature Topr −35~+85 °C Storage temperature Tstg −55~+150 °C ∗ PCB (70mm×70mm×1.6mm, glass epoxy) mounting. Reduce power by 4.4mW for each degree above 25°C. !Recommended operating conditions (Set the power supply voltage taking allowable dissipation into considering) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VCC 3 5 10 V 1/5 BA5962FVM Optical disc ICs !Block diagram 8 7 6 + 5 − LEVEL SHIFT STAND-BY + − 25k 50k 1 2 3 4 TSD : Thermal shut down !Pin descriptions Pin No. Functions Pin name Functions Pin No. Pin name 1 STBY Stand-by control input 5 GND GND 2 BIAS Bias input 6 OUT− Driver negative output 3 IN 1 Driver input 1 (Low gain) 7 OUT+ Driver positive output 4 IN 2 Driver input 2 (High gain) 8 VCC Power supply input !Input output circuits Driver output BIAS input VCC VCC positive output 7pin 10k 100k 25k VCC negative output 6pin 50k 2pin 100k 10k Driver input Stand-by control input VCC VCC Pre VCC 50k 3pin 1pin 100k VCC 25k 100k 4pin 2/5 BA5962FVM Optical disc ICs !Electrical characteristics (unless otherwise noted, Ta=25°C, VCC=5V, VBIAS=1.65V, RL=50Ω) Symbol Min. Typ. Max. Unit IQ − 3 6 mA Measuring circuit Fig.1 Input voltage range VINR 0 ∼ VCC V Fig.1 Output offset voltage VOOF −40 − 40 mV Maximum output voltage amplitude VOM 3.7 4.1 − V Closed circuit gain 1 (Input IN1) GVC1 10 12 14 dB VIN=1.35V, 1.95V Fig.1 Closed circuit gain 2 (Input IN2) GVC2 16 18 20 dB VIN=1.35V, 1.95V Fig.1 Srand-by ON voltage VSTON − − 0.5 V Fig.1 Srand-by OFF voltage VSTOFF 2.0 − − V Fig.1 Bias terminal voltage drop mute ON-level voltage VBMON − − 0.4 V Fig.1 Bias terminal voltage drop mute OFF-level voltage VBMOFF 1.0 − − V Fig.1 Parameter Quiescent current without signal Conditions <Driver block> VIN=BIAS=1.65V Fig.1 Fig.1 This product in not designed for protection against radioactive rays. !Measuring circuit VO + V VCC=5V IQ RL + 50Ω A 0.1µ 8 7 6 + 5 − LEVEL SHIFT STAND-BY + − 25k 50k 1 2 VST 3 4 VIN1 VIN2 VBIAS =1.65V VIN1 VIN2 Fig.1 3/5 BA5962FVM Optical disc ICs 1. Switch table Symbol Switch VIN 1 VIN 2 Input RL VIN VST OFF OFF − 2.0V IQ OFF Voof ON ON ON 1.65V 2.0V VOM 1 ON OFF ON ∗1 2.0V VOM 2 OFF ON ON ∗1 GVC 1 ON OFF ON ±0.3V GVC 2 OFF ON ON VSTOFF ON OFF ON VSTON ON OFF ON Measuring point IQ VO ∗1 VIN=0V and 5V VO 2.0V ∗1 VIN=0V and 5V VO 2.0V VIN=1.35V and 1.95V VO ±0.3V 2.0V VIN=1.35V and 1.95V VO 5V 0.5V VO 5V 2.0V VO !Application example LOAD M 8 7 6 5 BA5962FVM 1 2 3 STAND-BY BIAS SIGNAL 4 SERVO PREAMP Fig.2 !Operation notes 1. A thermal-shutdown circuit (over-temperature protection circuit) is built in to prevent the IC from thermal breakdown. Use the IC under the thermal loss allowed to the package. In case the IC is left running over the allowable loss, the junction temperature rises, and the thermal-shutdown circuit works at the junction temperature of 160°C (typ.) (the outputs of the driver is turned off). When the junction temperature drops to 135°C (typ.), the IC start operating again. 2. When stand-by control terminal (Pin 1) drops below 0.5V, stand-by mode is established. Make sure that under normal operating conditions, this pin at 2.0V or above. 3. If VCC (Pin 8) drops below 2.5V (typ.), the driver is turned off. When the voltage exceeds 2.7V (typ.) the driver returns to its previous state. 4/5 BA5962FVM Optical disc ICs 4. If the bias pin (Pin 2) drops below 0.7V, the output is muted. Make sure that under normal operating conditions, this pin is at 1.0V or above. 5. The output is muted in the event of a thermal shut down, mute-on, or a bias and VCC voltage drop. Only the driver is muted. When muted, the internal bias voltage of the output pin becomes roughly (VCC-Vf) / 2). (Vf=0.7V) 6. Please connect a bypass capacitor (0.1µF) across the supply voltage lines close to the IC pins. 7. When a capacitance load is connected to the OP amplifier output, the amplifier phase margin decreases, which causes the peak or oscillation. When connecting such load, insert a resistance in series between the output and the capacitance load and take a full consideration for frequency characteristics to prevent problem during practical use. 8. Do not short-circuit between any output pin and supply pin (supply fault) or ground (ground fault), or between any output pins (load short-circuit). When mounting the IC on the circuit board, be extremely cautions about the orientation of the IC. If the orientation is mistaken, the IC may break down, and produce smoke in some cases. POWER DISSIPATION : Pd (W) !Electrical characteristics curve On less than 3% (percentage occupied by copper foil), 70mm×70mm, t=1.6mm glass epoxy mounting. 0.6 0.4 0.2 0 0 25 50 75 125 100 150 175 AMBIENT TEMPERATURE : Ta (°C) Fig.3 Power dissipation !External dimensions (Units : mm) 5 1 4 0.29±0.15 0.6±0.2 8 2.8±0.1 4.0±0.2 2.9±0.1 +0.05 0.145−0.03 0.9Max. 0.75±0.05 0.08±0.05 0.475 +0.05 0.22−0.04 0.65 0.08 M 0.08 S MSOP8 5/5