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AN12959A Datasheet

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DATA SHEET
AN12959A
Part No.
Package Code No.
UBGA021-W-2525AEA
Publication date: February 2008
SDE00028AEB
1

Summary of Contents

Page 1

... DATA SHEET Part No. Package Code No. Publication date: February 2008 AN12959A UBGA021-W-2525AEA SDE00028AEB 1 ...

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... AN12959A Overview ... 3 Features … ...

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... C bus control compatible AGC built-in stereo BTL amplifier IC 2 Overview AN12959A has a built-in AGC function in a stereo BTL amplifier for driving a piezoelectric speaker to prevent noise at output clip bus control method is applied in switching of each mode like some Standby function is turned ON/OFF. ...

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... AN12959A Application Circuit Example (Block Diagram) 7.5 Ω Ω Piezoelectric speaker ROUT_POS GND_SPR ROUT_NEG 7.5 Ω Ω VCC_SP 6.1 V VCC_SP 1 μF VREF_SP 1 μF Piezoelectric speaker 7.5 Ω Ω LOUT_NEG GND_SPL 7.5 Ω Ω LOUT_POS B3 pin Operate voltage VCC_D 1.8 V Operate > 1.62 V Shut-down < 0.18 V Note) 1. This circuit and these circuit constants show an example and do not guarantee the design as a mass-production set. ...

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... AN12959A Pin Descriptions Pin No. Pin name Type A1 GND_SPL Ground A2 LOUT_POS Output A3 VCC_D Power Supply A4 SCL A5 GND Ground B1 LOUT_NEG Output B2 N.C. B3 S.D B4 SDA Input / Output C1 VCC_SP Power Supply C2 VREF_SP C3 N.C. C4 PREOUT_L Output C5 FB_L D1 ROUT_NEG Output D2 N.C. D3 GND Ground D4 PREOUT_R Output D5 FB_R E1 GND_SPR Ground ...

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... AN12959A Absolute Maximum Ratings A No. Parameter 1 Supply voltage 2 Supply current 3 Input voltage 4 Power dissipation 5 Operating ambient temperature 6 Storage temperature Note) 1: The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. 2: The power dissipation shown is the value at T When using this IC, refer to the • ...

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... AN12959A Electrical Characteristics at VCC 3.0 V, VCC_D 1.8 V, VCC_SP 6 25°C±2°C unless otherwise specified. Note Parameter No. Circuit Current Circuit current 1A at non-signal 1 (VCC) Circuit current 2A at non-signal 2 (VCC_SP) Circuit current 3A at non-signal 3 (VCC_D) Circuit current 1B at non-signal 4 (VCC) Circuit current 2B at non-signal ...

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... AN12959A Electrical Characteristics at VCC 3.0 V, VCC_D 1.8 V, VCC_SP 6.1 V (continued) 25°C±2°C unless otherwise specified. Note Parameter No interface SCL, SDA signal input Low 15 level SCL, SDA signal input High 16 level 17 SDA signal output Low Level 18 SCL, SDA signal input current Max ...

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... AN12959A Electrical Characteristics (Reference values for design 1.65 VSTBY 3 REF 25°C±2°C unless otherwise specified. Note The characteristics listed below are reference values derived from the design of the IC and are not guaranteed by inspection problem does occur related to these characteristics, we will respond in good faith to user concerns. ...

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... AN12959A Technical Data I 2 C-bus mode 1.Write mode SDA SCL SLAVE ADDRESS START CONDITION Two transmission messages (i.e. the SCL and SDA) are sent in synchronous serial transmission. The SCL is a clock with fixed frequency. The SDA indicates address data for the control of the reception side, and is sent in parallel in synchronization with the SCL ...

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... AN12959A Technical Data (continued C-bus mode (continued) 1.Write mode (continued) 2 (a) I C-bus PROTOCOL Slave address: 10110110 (B6Hex) Format (Normal) S Slave address W Start Write condition Mode: 0 (b) Auto increment Sub-address 0Hex: Auto increment mode (When the data is sent in sequence, the sub-address will change one by one and the data will be input.) ...

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... AN12959A Technical Data (continued C-bus mode (continued) 1. Write Mode (continued) (e) AGC-attack-time selection Write Attack 01Hex Register time 0 (g) AGC-on-level selection at VCC 3.0 V, VCC_D 1.8 V, VCC_SP 6 Write 01Hex Register ...

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... AN12959A Technical Data (continued C-bus mode (continued) 2. Read Mode 2 (a) I C-bus PROTOCOL Slave address 10110111 (B7Hex) Format S Slave address R Read Mode the slave address input sequentially output from Data 0. There is no necessity for inputting the sub-address. Note) (b) Sub-address Byte and Data Byte Format ...

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... AN12959A Technical Data (continued) I/O block circuit diagrams and pin function descriptions Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin Waveform No. and voltage S Hi-Z SCL A4 A4 Hi-Z SDA B4 B4 Hi-Z VCC_D A3 1.8 V(typ.) Internal circuit VCC_D (1.8 V) Input impedance VCC_D (1 ...

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... AN12959A Technical Data (continued) I/O block circuit diagrams and pin function descriptions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin Waveform No. and voltage VCC_SP(6.1 V) LOUT_POS A2 DC 2.7 V GND_SPL VCC_SP(6.1 V) LOUT_NEG B1 DC 2.7 V VCC_SP C1 6 ...

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... AN12959A Technical Data (continued) I/O block circuit diagrams and pin function descriptions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin Waveform No. and voltage VCC_SP(6.1 V) ROUT_NEG D1 DC 2.7 V GND_SPR VCC_SP(6.1 V) ROUT_POS E2 DC 2.7 V VCC_SP(6.1 V) ...

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... AN12959A Technical Data (continued) I/O block circuit diagrams and pin function descriptions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin Waveform No. and voltage A5 GND VCC E4 3.0 V(typ.) VREG (5 V) VREF 2.5 V PREOUT_R ...

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... AN12959A Technical Data (continued) I/O block circuit diagrams and pin function descriptions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin Waveform No. and voltage VREG (5 V) FB_R D5 DC 2.5 V GND VREG (5 V) FB_L C5 DC 2.5 V GND ...

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... AN12959A Technical Data (continued) Power supply and logic sequence Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. The timing control of power-ON/OFF and each logic according to the procedure below should be recommended for the best pop performance caused in switching ...

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... Power supply 1) Power supply for output amplifier The output amplifier operates with voltage applied to VCC_SP. When power supply is applied to only VCC_SP in AN12959A, the product does not operate. (In case where voltage is not applied to VCC and VCC_D), it gets in Standby condition. AN12959A output maximum amplitude 2) Power supply for control system The control system operates with power supply applied to VCC pin ...

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... AN12959A Technical Data (continued) Explanation on mainly functions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. 2. Speaker amplifier μ 10 kΩ 0.1 F INPUT_L 1) the gain for a input amplifier can be set with an external resistance. Input impedance is also set with the external resistance. When the gain for the input amplifier is set at ±0 dB, the total gain ...

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... AN12959A Technical Data (continued) Explanation on mainly functions (continued) Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. 2. Speaker amplifier (continued) 3) With the smaller capacity of the input AC coupling capacitor, HPF, which removes unwanted low frequency element, can be constructed. When input resistance is assumed as R1, and AC coupling capacitor as C1 π ...

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... Cautions about VCC_SP ON/OFF With VCC in AN12959A always on, when VCC_SP is turned ON/OFF, I OFF ON without I2C control, pop sound comes out, as starting time for the amplifier gets significantly long. (Input amplifier, AGC circuit, and standard voltage are provided by VCC_SP). Note) Please never fail to turn ON Standby and SP_Save with I ...

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... AN12959A Technical Data (continued) Simulation of output current waveform Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. (There is twice as much difference as between current and voltage in a piezoelectric speaker per 1 channel.) A piezoelectric speaker of ceramic lamination type is used. ...

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... AN12959A Technical Data (continued) ⎯ diagram D a SDE00028AEB 25 ...

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... AN12959A Usage Notes 1. Please carry out the thermal design with sufficient margin such that the power dissipation will not be exceeded, based on the conditions of power supply, load and surrounding temperature. Although indicated also in the column of the maximum rating, the maximum rating becomes an instant and the marginal value which must not exceed. It sufficiently evaluates, and I use-wish that it may not exceed certainly ...

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Request for your special attention and precautions in using the technical information and (1) If any of the products or technical information described in this book exported or provided to non-residents, the laws and regulations of the ...

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