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EV0045 Datasheet(PDF) 5 Page - Monolithic Power Systems |
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EV0045 Datasheet(HTML) 5 Page - Monolithic Power Systems |
5 / 9 page MP7731 – 5W – 30W CLASS D MONO BRIDGED AUDIO AMPLIFIER MP7731 Rev. 1.8 www.MonolithicPower.com 5 9/25/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description 1, 5, 11, 16 NC No Connect – Not internally connected 2 PIN1 Amplifier 1 Positive Input. PIN1 is the positive side of the differential input to Amplifier 1. Use a resistive voltage divider to set the voltage at PIN1 to VDD/2. See Figure 1. 3 NIN1 Amplifier 1 Negative Input. NIN1 is the negative side of the differential input to Amplifier 1. See Figure 1. 4 AGND1 Analog Ground 1. Connect AGND1 to AGND2. 6 EN1 Enable Input 1. EN1 must be connected to EN2. Drive high to enable MP7731, drive low to disable. 7 NIN2 Amplifier 2 Negative Input. NIN2 is the negative side of the differential input to Amplifier 2. See Figure 1. 8 PIN2 Amplifier 2 Positive Input. PIN2 is the positive side of the differential input to Amplifier 2. Use a resistive voltage divider to set the voltage at PIN2 to VDD/2. See Figure 1. 9 AGND2 Analog Ground 2. Connect AGND2 to AGND1. 10 EN2 Enable Input 2. EN2 must be connected to EN1. Drive high to enable MP7731, drive low to disable. 12 BS2 High-Side MOSFET Bootstrap Input for Amplifier 2. A capacitor from BS2 to SW2 supplies the gate drive current to the internal high-side MOSFET. Connect a 1µF capacitor from SW2 to BS2. See Figure 1. 13 VDD2 Power Supply Input. Bypass VDD2 to PGND2 with a 1µF X7R capacitor (in addition to the main bulk capacitor), placed close to the IC PIN13 and PIN15. 14 SW2 Switched Power Output. SW2 is the output of Amplifier 2. Connect the LC filter to this pin. See Figure 1. 15 PGND2 Power Ground for Amplifier 2. Connect PGND2 to PGND1. See Figure 1. 17 BS1 High-Side MOSFET Bootstrap Input for Amplifier 1. A capacitor from BS1 to SW1 supplies the gate drive current to the internal high-side MOSFET. Connect a 1µF capacitor from SW1 to BS1. See Figure 1. 18 VDD1 Power Supply Input. Bypass VDD1 to PGND1 with a 1µF X7R capacitor (in addition to the main bulk capacitor), placed close to the IC PIN18 and PIN20. 19 SW1 Switched Power Output. SW1 is the output of Amplifier 1. Connect the LC filter to this pin. See Figure 1. 20 PGND1 Power Ground for Amplifier 1. Connect PGND1 to PGND2. See Figure 1. |
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