MP8040

EV0041 Monolithic Power Systems General Description The EV0041 is an evaluation board designed to demonstrate the capabilities of MPS’ MP8040. It can be configured as a stereo single ended amplifier (EV0041A) or a full bridge mono amplifier (EV0041B). The MP8040 is a general purpose, high frequency half bridge power driver. The MP8040 integrates both top and bottom nchannel MOSFET power switches. The MP8040 is fully protected from both sourcing and sinking current by a preset cycle-by-cycle current limit. The MP8040 features a low-current shutdown-mode, input under-voltage protection, thermal shutdown, and fault flag signal output. The MP8040 interfaces with standard logic signals and is available in small 8-lead SOIC package. MP8040 Full Bridge or Single Ended Audio Amplifier EVALUATION BOARD Absolute Maximum Ratings Supply Voltage VIN SW Pin Voltage VSW SW to BS Voltage at All Other Pins RMS Output Current -0.3V to 26V -0.3V to VIN -0.3V to 6V -0.3V to 6V 6A Maximum Recommended Operating Conditions Input Supply Voltage (VIN) Peak Output Current RMS Output Current 7.5 V to 25V 9A Maximum 4.5A Maximum Features +/- 9A Peak Current Output +/- 4.25A Continuous Current Output Up to 1.2MHz Switching Frequency Protected Integrated Power 0.1 Ω Switches Designed Switch Dead time of 30ns All Switches Current Limited Internal Under-voltage Protection Internal Thermal Protection 1µA Standby Mode Fault Indicator Output Ordering Information Board Number EV0041 MPS IC Number MP8040DN EV0041 Evaluation Board Applications Full or Half Bridge DC-DC Switching Regulator Class D Audio Driver Motor Driver (Actual Size: 3.5”X x 3.5”Y) EV0041 Rev 1.4_8/1/05 Monolithic Power Systems, Inc. 1 EV0041 Monolithic Power Systems Figure 3: EV0041A Stereo Single Ended Schematic MP8040 Full Bridge or Single Ended Audio Amplifier EVALUATION BOARD Open D3 4148 MP8040DN C1 Open D4 4148 MP8040DN C11 Table 1: EV0041A Stereo Single Ended Bill of Materials Component U1, U2 C4, C5, C7 C3, C10 C12 C1, C11 C2, C8 C6, C9 L1, L2 R1, R6 R2, R3, R5, R8 R4, R7, R9 D1, D2 D3, D4 Description PWM Power Driver 1000µF/35V 0.47µF No Stuff 10nF Alternate 1µF 1µF Alternate 15µH, 6A No Stuff 100KΩ No Stuff 1A, 30V, Schottky Alternate 300mA, 100V Manufacturer Part Number Monolithic Power Systems MP8040DN Panasonic P/N EEUFC1V102B Panasonic P/N ECQV1H474JL N/A NIC P/N NMC0603X7R103K10 Taiyo Yuden P/N UMK107BJ103MA Taiyo Yuden P/N UMK107BJ103MA NIC P/N NMC12063X7R105K16 Taiyo Yuden P/N GMK316BJ105ML Toko P/N 13BHBP-A7502H Taiyo Yuden P/N GMK316BJ105ML Toko P/N 13BHBP-A7502H N/A On Semiconductor P/N MBR130 Diodes Inc., P/N B130B Diodes Inc. P/N 1N4148WS Package SOIC8 5.0-R10.0 5.08 5.08 0603 0603 0805 1206 1206 13BHBP 0805 0805 0805 SMC SMC SOD323 Total EV0041 Rev 1.4_8/1/05 Monolithic Power Systems, Inc. Qty 2 3 3 0 2 0 2 2 2 0 4 0 2 0 2 24 2 EV0041 Monolithic Power Systems Figure 4: EV0041B Mono Full Bridge Schematic MP8040 Full Bridge or Single Ended Audio Amplifier EVALUATION BOARD Open D3 4148 MP8040DN C1 Open Short Short 0.47uF Open D4 4148 MP8040DN C11 Open Short Table 2: EV0041B Mono Full Bridge Bill of Materials Component U1, U2 C5 C3, C10, C12 C4, C7 C1, C11 C2, C8 C6, C9 L1, L2 R1, R6 R2, R3, R5, R8 R4, R7, R9 D1, D2 D3, D4 Description PWM Power Driver 1000µF/35V 0.47µF No Stuff 10nF Alternate 1µF 1µF Alternate 15µH, 6A No Stuff 100KΩ 0Ω 1A, 30V, Schottky Alternate 300mA, 100V Manufacturer Part Number Monolithic Power Systems MP8040DN Panasonic P/N EEUFC1V102B Panasonic P/N ECQV1H474JL N/A NIC P/N NMC0603X7R103K10 Taiyo Yuden P/N UMK107BJ103MA Taiyo Yuden P/N UMK107BJ103MA NIC P/N NMC12063X7R105K16 Taiyo Yuden P/N GMK316BJ105ML Toko P/N 13BHBP-A7502H Taiyo Yuden P/N GMK316BJ105ML Toko P/N 13BHBP-A7502H N/A On Semiconductor P/N MBR130 Diodes Inc., P/N B130B Diodes Inc. P/N 1N4148WS Package SOIC8 5.0-R10.0 5.08 5.0-R10.0 0603 0603 0805 1206 1206 13BHBP 0805 0805 0805 SMC SMC SOD323 Total EV0041 Rev 1.4_8/1/05 Monolithic Power Systems, Inc. Qty 2 3 3 0 2 0 2 2 0 2 0 4 0 2 0 2 24 3 EV0041 Monolithic Power Systems Operation 1. The EV0041 comes configured as a stereo single ended audio amplifier (EV0041A). 2. To configure the board as a full bridge circuit (EV0041B), short R4, R7, R9, remove C4, C7 and MP8040 Full Bridge or Single Ended Audio Amplifier EVALUATION BOARD stuff C12 with a 0.47µF capacitor. 3. Connect the audio inputs to the IN pins as shown in Figure 5. 4. Connect speakers to pins 1-4 as shown in Figure 5 for single ended configuration. Use pins 2 and 3 for bridged circuit. 5. Connect the power supply to the VIN terminals as shown in Figure 5. 6. SHDN enables/disables the MP8040. Drive SHDN low to turn on the MP8040, drive it high to turn it off. If not used connect SHDN to GND. 7. A low output at FLT indicates that the MP8040 has detected a fault and has shutdown. 8. The DR pin is an optional fixed 5V voltage output capable of driving a 1mA load for external circuitry. Figure 5: Top Side Evaluation Board Diagram Power Supply IN SHDN FLT DR GND IN SHDN FLT DR GND 1 Right Channel VIN GND 2 + Right Channel Bridge Outputs Left Channel 3 4 + - Single Ended Outputs Left Channel EV0041 Rev 1.4_8/1/05 Monolithic Power Systems, Inc. 4 EV0041 Monolithic Power Systems Figure 6: Top Silk Layer MP8040 Full Bridge or Single Ended Audio Amplifier EVALUATION BOARD Figure 7: Top Layer Figure 8: Bottom Layer NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without notice. Please contact the factory for current specifications. No responsibility is assumed by MPS for its use or fit to any application, nor for infringement of patent or other rights of third parties. EV0041 Rev1.4 8/1/05 © 2003 MPS, Inc. Monolithic Power Systems, Inc. 983 University Ave, Building D, Los Gatos, CA 95032 USA Tel: 408-395-2802 ♦ Fax: 408-395-2812 ♦ Web: www.monolithicpower.com 5