Middle Power Class-D Speaker Amplifiers Class-D Speaker Amplifier for Digital Input No.11075EAT17 BD5451EFV Description BD5451EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-power consumption, delivers an output power of 15W+15W. This IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD) process technology that eliminates turn-on resistance in the output power stage and internal loss due to line resistances up to an ultimate level. With this technology, the IC can achieve high efficiency of 90% (15W+15W output with 8 load). In addition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power consumption and low heat generation and eliminates necessity of external heat-sink up to a total output power of 30W. This product satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system. Features 1) This IC has one system of digital audio interface. 2 (I S format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs(fixed), MCLK: 256fs(fixed)) 2) Low supply current at RESET mode. 3) The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback circuitry of the output. In addition, a low noise and low distortion are achieved. Eliminate large electrolytic-capacitors for high performance of Power Supply Rejection. 4) S/N of the system can be optimized by adjusting the gain setting among 2 steps. (20dB / 26dB) 5) Available for Monaural mode. 6) Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (1018V) 7) It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat. 8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off. High quality muting performance is realized by using the soft-muting technology. 9) This IC is a highly reliable design to which it has various protection functions. (High temperature protection, under voltage protection, Output short protection, Output DC voltage protection and Clock stop protection, (MCLK, BCLK, LRCLK)) 10) Small package (HTSSOP-B28 package) contributes to reduction of PCB area. Applications Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc. www.rohm.com 2011.06 - Rev.A 1/34 2011 ROHM Co., Ltd. All rights reserved. Technical Note BD5451EFV Absolute maximum ratings (Ta=25) Parameter Symbol Ratings Unit Parameter Supply voltage V 22 V Pin 14, 15, 16, 27, 28 1 2 CC 3.3 W 3 Power dissipation P d 4.7 W 4 Input voltage V -0.3 4.5 V Pin 1 6, 13 1 IN Terminal voltage 1 V -0.3 7.0 V Pin 8, 11, 12 1 PIN1 Terminal voltage 2 V -0.3 4.5 V Pin 9 1 PIN2 Terminal voltage 3 V 22 V Pin 17, 18, 20 23, 25, 26 1 PIN3 Open-drain terminal voltage V -0.3 22 V Pin 10 1 ERR Operating temperature range T -25 +85 opr Storage temperature range T -55 +150 stg Maximum junction temperature T +150 jmax 1 The voltage that can be applied reference to GND (Pin 7, 19, 24). 2 Do not, however exceed Pd and Tjmax=150. 3 70mm70mm1.6mm, FR4, 2-layer glass epoxy board (Copper on bottom layer : 70mm70mm) Derating in done at 26.4mW/ for operating above Ta=25. There are thermal via on the board. 4 70mm70mm1.6mm, FR4, 4-layer glass epoxy board (Copper on bottom layer : 70mm70mm) Derating in done at 37.6mW/ for operating above Ta=25. There are thermal via on the board. Operating conditions (Ta=25) Parameter Symbol Ratings Unit Parameter Supply voltage V 10 18 V Pin 14, 15, 16, 27, 28 1 2 CC 3.6 VCC 18V 5 Minimum load impedance R L 3.2 VCC 16V 5 5 Do not, however exceed Pd. No radiation-proof design. www.rohm.com 2011.06 - Rev.A 2/34 2011 ROHM Co., Ltd. All rights reserved.