Datasheet Low Power Consumption Class D Speaker Amplifier series 9 W + 9 W Analog Input Class D Stereo Speaker Amplifier BD28412MUV General Description Key Specifications BD28412MUV is 9 W + 9 W stereo (or 18 W monaural Supply Voltage Range: 4.5 V to 13 V under parallel connection) class D amplifier which can Speaker Output Power: 9 W + 9 W (Typ) output power without an external heat sink. (VCC = 12 V, RL = 8 , PLIMIT = 0 V) This LSI has built-in precise oscillator which generate Speaker Output Power(PBTL): 18 W (Typ) selectable switching frequencies, so AM radio (VCC = 12 V, RL = 4 , PLIMIT = 0 V) interference can be avoided. In addition, 2.1 Ch audio Total Harmonic Distortion Ratio: system can be achieved by master and slave operation 0.03 % (Typ) P = 1 W O without caring about beat noise. (VCC = 11 V, RL = 8 , PLIMIT = 0 V) This LSI achieves lower power consumption under low Crosstalk: 100 dB (Typ) output power, and suitable for speaker systems in PSRR: 55 dB (Typ) which battery is equipped such as wireless speakers. Output Noise Voltage: -80 dBV (Typ) Standby Current: 0.1 A (Typ) Features Operating Current: 16 mA (Typ) (No Load nor Filter, No Signal) Analog Differential Input Operating Temperature Range: -25 C to +85 C Low Standby Current Output Feedback Circuitry Prevents Sound Quality Degradation Caused by Power Supply Voltage Package W (Typ) x D (Typ) x H (Max) Fluctuation, Achieves Low Noise and Low VQFN032V5050 5.00 mm x 5.00 mm x 1.00 mm Distortion, Eliminates the Need of Large Electrolytic-Capacitors for Decoupling Power Limit Function (Linearly-programmable for voltage of PLIMIT) Selectable Switching Frequency (AM Avoidance Function) Synchronization Control is Supported (Selectable Master and Slave Operation) Parallel BTL (PBTL) is Supported Wide Voltage Range (VCC = 4.5 V to 13 V) Operate with Single Power Supply High Efficiency and Low-heat-generation Make the System Smaller, Thinner, and More Power-saving Typical Application Circuit Pop Noise Prevention During Power Supply SP ch1 SP ch2 ON/OFF (Lch) (Rch) High Reliability Design by Built-in Protection Circuits - Overheat Protection - Under Voltage Protection - Output Short Protection - Output DC Voltage Protection Small Package (VQFN032V5050) Achieves Mount Area Reduction Applications Wireless Speakers, Small Active Speakers, Portable Audio Equipments, etc. Audio Source Other device Figure 1. Typical Application Circuit *The phase of OUTxx LC is inverted from the phase of INxx. ex. The phase of OUT1P LC is inverted from the phase of IN1P. Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays. www.rohm.com TSZ02201-0C1C0E900620-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/40 TSZ22111 14 001 22.Mar.2019 Rev.005 PDX MUTE BSP1P OUT1P LC * PLIMIT OUT1P ERRORX IN1P * IN1N * OUT1N OUT1N LC * IN2P * BSP1N IN2N * FSEL<2:0> BSP2P OUT2P LC SYNC * OUT2P OUT2N OUT2N LC * GAIN BSP2N MS SEL TESTBD28412MUV Pin Configuration (TOP VIEW) 32 31 30 29 28 27 26 25 IN1P 1 24 OUT1P IN1N 2 23 GNDP1 PLIMIT 3 22 OUT1N GNDA 4 21 BSP1N EXP-PAD REGG 5 20 BSP2P GAIN MS SEL 6 19 OUT2P IN2P 7 18 GNDP2 IN2N 8 17 OUT2N 9 10 11 12 13 14 15 16 Figure 2. Pin Configuration www.rohm.com TSZ02201-0C1C0E900620-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/40 TSZ22111 15 001 22.Mar.2019 Rev.005 ERRORX SYNC PDX FSEL0 TEST FSEL1 REGA FSEL2 MUTEX NC NC VCCA VCCP2 VCCP1 BSP2N BSP1P