www.fairchildsemi.com FAN7021 CMOS Power Amplifier Features Description * Continuous average power is 1.0W (8) * Low THD: under 0.2% (5V) * Do not need output coupling capacitor or bootstrap capacitor * Low shutdown current: 0.01A * Shutdown: High active * Built in reduction circuit for popping noise * Built in TSD circuit The FAN7021 is a bridge connected audio power amplifier capable of delivering 1W of continuous average power to an 8 load with less than 0.2%(THD) from a 5V power supply. The FAN7021 require few external components and operate on low supply voltage from 2.0V to 5.5V. Since the FAN7021 does not require output coupling capacitor, bootstrap capacitors, or snubber networks, it is ideally suited for low power portable systems that require minimum volume and weight. The FAN7021 feqtures an externally controlled, low power consumption shutdown mode (0.01 uA,typ). Additional FAN7021 features include thermal shutdown protection, unity gain stability, and external gain set. Typical Applications * Cellular phone * Portable computer * Audio systems 8-SOP-225 1 Internal Block Diagram IN- 4 5 VO1 IN+ 3 20K 20K BP 2 8 VO2 100K VDD 6 SD 1 Bias 100K 7 GND Rev. 1.0.0 (c)2001 Fairchild Semiconductor Corporation FAN7021 Pin Assignments VO2 GND VDD VO1 8 7 6 5 FAN7021 1 2 3 4 SD BP IN+ IN- Pin Definitions Pin Number Pin Name Pin Function Description 1 SD Shutdown 2 BP Bypass 3 IN+ Input + 4 IN- Input - 5 VO1 Power AMP output 1 6 VDD Supply Voltage 7 GND Ground 8 VO2 Power AMP output 2 Absolute Maximum Ratings (Ta = 25C) Parameter Symbol Value VDD 6.0 V PD - W Operating Temperature TOPR -40 ~ +85 C Operating temperature Storage Temperature TSTG -65 ~ +150 C Storage temperature Maximum Supply Voltage Power Dissipation Unit Remark Maximum supply voltage - Recommended Operating Conditions (Ta = 25C) Parameter Operating Supply Voltage 2 Symbol Min. Typ. Max. Unit VDD 2.0 - 5.5 V FAN7021 Electrical Characteristics (RL = 8, Ta = 25C, Unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit - 4.0 7.0 mA VDD = 5.0V, UNLESS OTHERWISE SPECIFIED Quiescent power supply current IDD VIN=0V,IO=0A Shutdown current ISD VSD=VDD - 0.01 2.0 A Output offset voltage VOS VIN=0V - 5 50 mV Output power PO THD=0.2% (Max.);f=1KHz - 1 - W f=1KHz - 0.1 - % f=20KHz - 0.4 - % VDD=4.9V to 5.1V - 65 - dB - 3.0 - mA PO=0.25Wrms,AVD=2,filter=80KHz Total harmonic distortion+Noise Power supply rejection ratio THD+N PSRR VDD = 3.3V, UNLESS OTHERWISE SPECIFIED Quiescent power supply current IDD VIN=0V,IO=0A Shutdown current ISD VSD=VDD - 0.01 - A Output offset voltage VOS VIN=0V - 5 - mV Output power PO THD=1% (Max.);f=1KHz 0.45 0.5 - W f=1KHz - 0.15 - % f=20KHz - 0.45 - % VDD=3.2V to 3.4V - 65 - dB PO=0.25Wrms,AVD=2,filter=80KHz Total harmonic distortion+Noise Power supply rejection ratio THD+N PSRR VDD = 2.6V, UNLESS OTHERWISE SPECIFIED Quiescent power supply current IDD VIN=0V,IO=0A - 2.5 - mA Shutdown current ISD VSD=VDD - 0.01 - A Output offset voltage VOS VIN=0V - 5 - mV Output power PO THD=0.3% (Max.);f=1KHz - 0.25 - W f=1KHz - 0.25 - % f=20KHz - 0.5 - % VDD=2.5V to 2.7V - 65 - dB PO=0.25Wrms,AVD=2,filter=80KHz Total harmonic distortion+Noise Power supply rejection ratio THD+N PSRR 3 FAN7021 Typical Application Circuits RF 20K CI 0.39u + 4 RI 20K IN5 VO1 3 IN+ 20K CB 1u + 20K 2 VDD RPU 10K + 6 BP Speaker 8 VDD VO2 100K 8 CS 1u Bias 1 100K SD GND 7 4 FAN7021 Performance Characteristics Figure 1. THD+N versus output power Figure 3. THD+N versus output power Figure 5. THD+N versus Frequency Figure 2. THD+N versus output power Figure 4. THD+N versus Frequency Figure 6. THD+N versus Frequency 5 FAN7021 Performance Characteristics (Continued) Figure 7. Power supply rejection ration 6 Figure 8. Power supply rejection ration Figure 9. Power supply rejection ration Figure 10. Power Dissipation versus output power Figure 11. Power Dissipation versus output power Figure 12. Power Dissipation versus output power FAN7021 Performance Characteristics (Continued) Power Dissipation [W] 1 0.8 0.6 0.4 0.2 -40 25 85 150 Ambient Temperature [ oC] Figure 13. Output power versus supply voltage Figure 14. Power darting curve 7 FAN7021 Mechanical Dimensions (Unit: mm) Package 8-SOP-225 8 FAN7021 Ordering Information Device Package Operating Temp. FAN7021M 8-SOP-225 -40C ~ +85C 9 FAN7021 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 11/9/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation