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| www.fairchildsemi.com FAN7021 CMOS Power Amplifier Features * 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 Description 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. 8-SOP-225 Typical Applications * Cellular phone * Portable computer * Audio systems 1 Internal Block Diagram IN- 4 5 VO1 IN+ 3 20K 20K BP 2 100K VDD 6 8 VO2 SD 1 Bias 100K 7 GND Rev. 1.0.0 (c)2001 Fairchild Semiconductor Corporation FAN7021 Pin Assignments VO2 8 GND 7 VDD 6 VO1 5 FAN7021 1 SD 2 BP 3 IN+ 4 IN- Pin Definitions Pin Number 1 2 3 4 5 6 7 8 Pin Name SD BP IN+ IN- VO1 VDD GND VO2 Pin Function Description Shutdown Bypass Input + Input - Power AMP output 1 Supply Voltage Ground Power AMP output 2 Absolute Maximum Ratings (Ta = 25C) Parameter Maximum Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VDD PD TOPR TSTG Value 6.0 -40 ~ +85 -65 ~ +150 Unit V W C C Remark Maximum supply voltage Operating temperature Storage temperature Recommended Operating Conditions (Ta = 25C) Parameter Operating Supply Voltage Symbol VDD Min. 2.0 Typ. Max. 5.5 Unit V 2 FAN7021 Electrical Characteristics (RL = 8, Ta = 25C, Unless otherwise specified) Parameter Quiescent power supply current Shutdown current Output offset voltage Output power Total harmonic distortion+Noise Power supply rejection ratio Quiescent power supply current Shutdown current Output offset voltage Output power Total harmonic distortion+Noise Power supply rejection ratio Quiescent power supply current Shutdown current Output offset voltage Output power Total harmonic distortion+Noise Power supply rejection ratio Symbol IDD ISD VOS PO THD+N PSRR IDD ISD VOS PO THD+N PSRR IDD ISD VOS PO THD+N PSRR Conditions VIN=0V,IO=0A VSD=VDD VIN=0V THD=0.2% (Max.);f=1KHz PO=0.25Wrms,AVD=2,filter=80KHz f=1KHz f=20KHz VDD=4.9V to 5.1V VIN=0V,IO=0A VSD=VDD VIN=0V THD=1% (Max.);f=1KHz PO=0.25Wrms,AVD=2,filter=80KHz f=1KHz f=20KHz VDD=3.2V to 3.4V VIN=0V,IO=0A VSD=VDD VIN=0V THD=0.3% (Max.);f=1KHz PO=0.25Wrms,AVD=2,filter=80KHz f=1KHz f=20KHz VDD=2.5V to 2.7V 0.25 0.5 65 % % dB VDD = 2.6V, UNLESS OTHERWISE SPECIFIED 2.5 0.01 5 0.25 mA A mV W 0.15 0.45 65 % % dB VDD = 3.3V, UNLESS OTHERWISE SPECIFIED 0.45 3.0 0.01 5 0.5 mA A mV W 0.1 0.4 65 % % dB Min. Typ. 4.0 0.01 5 1 Max. 7.0 2.0 50 Unit mA A mV W VDD = 5.0V, UNLESS OTHERWISE SPECIFIED 3 FAN7021 Typical Application Circuits RF 20K CI 0.39u 4 RI 20K 3 + IN5 VO1 IN+ 20K CB 1u + 20K VDD 2 BP Speaker 8 VDD 100K VO2 8 RPU 10K + 6 CS 1u 1 Bias SD 7 100K GND 4 FAN7021 Performance Characteristics Figure 1. THD+N versus output power Figure 2. THD+N versus output power Figure 3. THD+N versus output power Figure 4. THD+N versus Frequency Figure 5. THD+N versus Frequency Figure 6. THD+N versus Frequency 5 FAN7021 Performance Characteristics (Continued) Figure 7. Power supply rejection ration 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 6 FAN7021 Performance Characteristics (Continued) 1 Power Dissipation [W] 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 FAN7021M Package 8-SOP-225 Operating Temp. -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. www.fairchildsemi.com 11/9/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 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. |
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