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TDF8599A Datasheet(PDF) 18 Page - NXP Semiconductors |
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TDF8599A Datasheet(HTML) 18 Page - NXP Semiconductors |
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18 / 55 page  TDF8599A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 3 — 2 May 2013 18 of 55 NXP Semiconductors TDF8599A I2C-bus controlled dual channel class-D power amplifier Pin DIAG goes LOW when a short circuit to one of the amplifier outputs occurs. The microprocessor reads the failure information using the I2C-bus. The I2C-bus bits are set for a short circuit. These bits can be reset with the I2C-bus read command. Even after the short has been removed, the microprocessor knows what was wrong after reading the I2C-bus. Old information is read when a single I2C-bus read command is used. To read the current information, two read commands must be sent, one after another. When selected, pin DIAG gives the current diagnostic information. Pin DIAG is released instantly when the failure is removed, independent of the I2C-bus latches. When OCP is triggered, the open-drain DIAG output is activated. The diagnostic output signal during different short circuit conditions is illustrated in Figure 15. 8.6.2 Load identification (I2C-bus mode only) 8.6.2.1 DC load detection DC load detection is only available in I2C-bus mode and is controlled using bit IB2[D2]. The default setting is logic 0 for bit IB2[D2] which disables DC load detection. DC load detection is enabled when bit IB2[D2] = 1. Load detection takes place before the class-D amplifier output stage starts switching in Mute mode and the start-up time from Standby mode to Mute mode is increased by tdet(DCload) (see Figure 16). Table 11. Available data on pins DIAG and CLIP Diagnostic I2C-bus mode Non-I2C-bus mode Pin DIAG Pin CLIP Pin DIAG Pin CLIP Power-on reset yes yes yes yes UVP or OVP yes no yes no Clip detection no selectable no yes Temperature pre-warning no selectable no yes OCP/WP yes no yes no DCP selectable no yes no OTP yes no yes no Fig 15. Diagnostic output for short circuit conditions 001aai786 AMPLIFIER RESTART shorted load pull up V AGND = 0 V ≈50 ms ≈50 ms ≈50 ms NO RESTART short to GND or VP line |
Similar Part No. - TDF8599A_15 |
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Similar Description - TDF8599A_15 |
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