LM4862

UNISONIC TECHNOLOGIES CO., LTD LM4862 Preliminary CMOS IC AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE DESCRIPTION The UTC LM4862 is a built in bridge-connected form audio amplifier. In normal operation, it can deliver 500 mW (typ.) continuous power. The output load of the UTC LM4862 should be 8Ω, the supply voltage should be 5V, and the THD is as low as 1%. As the most popular amplifiers, LM4862 is also designed to be able to provide high quality output power with less external components, such as the output capacitors for coupling, bootstrap capacitors, or snobbery networks. In applications, the UTC LM4862 can be specially used as an ideal in low-power portable systems, for example, portable computers, desktop computers, and low voltage audio systems, etc. DIP-8 SOP-8 FEATURES * Stable Unity Gain * Gain Configuration can be set by External Components ORDERING INFORMATION Ordering Number Lead Free Halogen Free LM4862L-D08-T LM4862G-D08-T LM4862L-S08-R LM4862G-S08-R Package DIP-8 SOP-8 Packing Tube Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-314.b LM4862 PIN CONFIGURATION Preliminary CMOS IC SHUTDOWN 1 8 VO2 BYPASS 2 7 GND IN+ 3 6 VDD IN- 4 5 VO1 PIN DESCRIPTION PIN NO 1 2 3 4 5 6 7 8 PIN NAME SHUTDOWN BYPASS IN+ INVO1 VDD GND VO2 DESCRIPTION Shutdown mode control input, high active Connect to internal voltage divider for middle supply bias Non-inverting power input pin Inverting power input pin Output power pin 1 Power supply Ground Output power pin 2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-314.b LM4862 BLOCK DIAGRAM Preliminary CMOS IC VDD + RF 20kΩ 6 100kΩ 4 -IN Ri 20kΩ Ci 0.39µF Audio Input CB 1.0µF 3 +IN + VDD /2 40kΩ + 2 Bypass 5 VO1 AV=-1 RL 8Ω CS 1.0µF 40kΩ VO2 8 Bias VDD RPU 1 Shutdown NC 100kΩ 7 GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R502-314.b LM4862 PARAMETER Supply Voltage Input Voltage Preliminary SYMBOL VDD VIN CMOS IC ABSOLUTE MAXIMUM RATING (Ta=25°С unless otherwise specified.) RATINGS UNIT 6.0 V -0.3 ~ +(0.3+VDD) V DIP-8 500 mW Power Dissipation PD SOP-8 300 mW Infrared (15 sec.) 220 °С Junction Temperature TJ +150 °С Storage Temperature TSTG -65 ~ +150 °С Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (VCC=5V, f=1kHz, Ta=25°С unless otherwise specified.) PARAMETER Supply Voltage Output Offset Voltage Quiescent Power Supply Current Shutdown Current Output Power Total Harmonic Distortion Power Supply Rejection Ratio SYMBOL TEST CONDITIONS VDD VOS VIN=0V IDD VIN=0V, IO=0A ISD VPIN1=VDD THD=1%, f=1kHz, RL=8Ω PO THD=10%, f=1kHz, RL=8Ω THD f=1kHz, RL=8Ω, Po = 500mW PSRR VCC=4.9V ~ 5.1V MIN 2.0 TYP MAX UNIT 5.5 V 5.0 50 mV 6.5 12.0 mA 0.6 µA 500 mW 800 mW 0.5 % 60 dB UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R502-314.b LM4862 Preliminary CMOS IC UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R502-314.b