TM AAM ZA2030 30W Class-D Bridged Audio Amplifier General Description Features The ZA2030 is a fully integrated 30W bridged Class-D Audio Amplifier. This simple, low-cost amplifier exhibits the high fidelity of a Class-A/B amplifier at very high efficiencies. The circuit is based on the proprietary variable frequency topology Analog Adaptive Modulation (AAM, Patent pending) that delivers excellent PSRR, fast response time and operates over a wide supply voltage range. • • • • • • • • • • • Ordering Information Part Number∗ Temperature ZA2030EWR Package 20-LD Wide SOIC -20℃ to +85℃ * For Tape & Reel, use suffix –Z (ZA2030EWRZ) 90% Efficiency at 20W Frequency to 600kHz 30W output at 22Vin 2.4V to 22V operation Integrated 0.22Ω switches Thermal shutdown Cycle-by-cycle short circuit protection Amplifies full audio range with low THD+N High open loop gain Employs soft clipping Standby-mode (Mute) Applications DVD and VCD players Audio amplifier Home stereo Multimedia computer Television Game machines Typical Application Circuit 1 Mar. 2002 TM AAM Absolute Maximum Ratings Vcc 25 V Logic Inputs -0.3V to 6.5V Junction Temperature 150 °C Power Dissipation (DIP) TBD W Boost Pin Voltage Vsw + 6V Thermal resistance (DIP) TBD °C /W Storage Temperature –55 °C to +150 °C ZA2030 30W Class-D Bridged Audio Amplifier Recommended Operating Conditions Input Voltage Vcc Operating Frequency 550kHz Feedback Input Operating Temperature Electrical Specifications (Unless otherwise specified Parameters Symbo l Controlled Voltage Output Output voltage swing L VL Output voltage swing H VH PSRR THD+N L THD+N M THD+N H Closed loop gain Efficiency PSRR THDL THDM THDH AVOL η Voltage Supply Standby current Supply current (operating) Icc(off) Icc(on) Output Drivers On resistance Short circuit current Ron Isc Operating clock frequency Control Input Input Range Input Leakage Enable Enable current Pin, Iin IL EN IEN Thermal shutdown TSD 0 to 6V °C -20 to + 85 °C Vcc=22V, Ta=25 °C) Condition Min Ty p Max 2 RL=4Ω F=1kHz THD=10% RL=4Ω F=1kHz THD=10% Vin=22-21V RL=4ΩPout=100mW RL=4ΩPout=10W RL=4ΩPout=30W See Typical Application RL=4ΩF=1kHz Pout=20W 1 0.1 0.2 1.0 32 90 V mV/V % % % dB % 20 Cycle by cycle current limit. Ton< 200ns Unit s V 20 Vcc = 18V, VEN = 0V Typical Application, Vin = 0V 10 uA mA 0.22 4 Ω A Fop 0 Enable threshold Enable = 5V 6V to 22V 20kHz to 600 kHz 6 5 V uA V mA 4.75 10 150 C Note 1. Exceeding these ratings may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Measured on approximately 1” square of 1 oz. copper surrounding device leads. 2 Mar. 2002 TM AAM ZA2030 30W Class-D Bridged Audio Amplifier Pin Description Pin No. 1,5,6,7,15,1 6 2 3 4 8 9 10 11 12 13 14,20 17 18 19 3 Pin Name PGnd Pin Function Out Vcc BS Out Vcc BS AGND Nin Pin ENABLE AGND Nin Pin Output (Pulse Out). Output connected to inductor. Power Supply (5.5V-22V) Bootstrap pin for Output FET. 1nF to Out Output (Pulse Out). Output connected to inductor. Power Supply (5.5V-22V) Bootstrap pin for Output FET. 1nF to Out ANALOG GND Input to the amplifier Common-mode reference voltage for the amplifier input LDO Output and Compensation ANALOG GND Input to the amplifier Common-mode reference voltage for the amplifier input Power GND. Mar. 2002 TM AAM ZA2030 30W Class-D Bridged Audio Amplifier Reference Design for a 30W Bridged Class-D Amplifier 4 Mar. 2002 TM AAM ZA2030 30W Class-D Bridged Audio Amplifier Table 1: Bill of Materials Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 5 Qty Description Resistors 6 10KΩ, ±5% 1/4W, leaded 1 1KΩ, ±5% 1/4W, leaded 2 135Ω, ±5% 1/4W, leaded 2 30KΩ, ±5% 1/4W, leaded Capacitors 5 1µF, 16V, electrolytic, leaded 1 1µF, 50V, ceramic, leaded 2 0.22µF, 16V, ceramic, leaded 2 2.2nF, 16V, ceramic, leaded 1 10µF, 50V, electrolytic, leaded 4 1µF, 50V, ceramic, leaded 2 100pF, 50V, ceramic, leaded Semiconductors 1 1N5231, zener diode, 5% Integrated Circuits 1 ZA2030 20 pin DIP 1 LM833 Audio Dual Op-Amp Magnetics 2 39uH, 3A inductor, leaded Hardware 1 Socket, 20-pin DIP 1 PCB, single-sided, ZA2030EVAL, Rev A Vendor / Part # Designation Any Any Any Any Rop Rxp RA1, RA2 RB1, RB2 Any Any Any Any Any Any Any Ce,, Ci1, CP CF CBS Cint CVcc1 CVcc, CF, CA1, CA2 Any D1 (C2) Vimicro corporation National Semiconductor Vimicro NSC Any L Any Any N/A N/A Mar. 2002