bd5468gul-e2 ROHM Co. Ltd., bd5468gul-e2 Datasheet
bd5468gul-e2
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... BD5468GUL ●Description BD5468GUL is a monaural Class-D speaker amplifier that contained ALC function for mobile phone, portable type electronic devices etc. LC filter of speaker output is not needed, can form monaural speaker amplifier. with 3 external parts. ALC, short for Automatic Level Control function that automatically adjusts up to the level of suppression of distortion (clip) of output wave form during excessive input ...
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... BD5468GUL ●Electrical Characteristic (Ta=+25℃, VDD=+3.6V, Unless specified otherwise) Parameter ＜All Device＞ Circuit current (no signal) Circuit current (shutdown) ＜Audio Feature＞ Limit output power Total harmonic distortion Maximum Gain ALC Limit level ALC Release level Switching frequency Start-up time Audio input resistance ＜ ...
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... BD5468GUL ●Measurement Circuit Diagram <Audio Characteristics Method of Evaluation > ■In case LC filter is not used Shutdown Signal SDNB Active Shutdown 1uF 1uF ■In case LC filter is used SDNB Shutdown Signal Active Shutdown 1uF ...
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... BD5468GUL ●External Dimension Diagram Top View 5468 LOT No. Side View ●Block Diagram B1 VDD SDNB Shutdown C2 Control 150k (Typ.) ALC IN IN GND ●Pin Explanation Pin No. Pin Name A1 IN+ A2 GND A3 OUT- B1 VDD B2 PVDD B3 PGND C1 IN- C2 SDNB C3 OUT+ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD5468GUL ●Application circuit example SHORT the power supply pin VDD (B1), PVDD (B2) at board pattern, then use singleness power supply. Shutdown Control SDNB Shutdown Signal Active L: IC Shutdown IN Audio Input + Differential Input Audio Input - Audio Differential Input Shutdown Control ...
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... BD5468GUL Shutdown Control SDNB Shutdown Signal Active L: IC Shutdown Audio Single End Input 1uF Audio Input 0. 1uF IN - Shutdown Control Shutdown Signal SDNB Active L: IC Shutdown 1uF 0. 1uF IN - Audio Input Audio Single End Input www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD5468GUL is a Class-D but, in relation to Audio Input and Output, is same with the conventional Class-AB Amplifier. For simplicity purposes of the diagram, the Class-D amplifier output stage is omitted in the following explanation. ...
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... BD5468GUL ○Gain calculation 【Differential Input】 +Battery B 1 VDD Shutdown Signal SDNB Shutdown C2 Control Active 150k (Typ .) Shutdown ALC IN+ < Audio Source > Vins Ci VIN (= 2Vins IN- Vins PGND GND When Input Level is calculated at IC typical and audio source typical, when input coupling capacitor (Ci) value is large ...
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... BD5468GUL ●Audio Input Pin External LPF connection example ■External LPF connection example st The connection example of 1 IN+/- (A1, C1 Pin) is shown below. The cut frequency of input LPF, together with the single end input and differential input is written below (2×π×R ×C ...
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... When the input capacitor Ci has enough large capacity value, the relation among external LPF resistor R resistor Ri and Gain will become: Gain = 20×log | Input resistor Ri of BD5468GUL and resistor value of feedback resistor Rf will become the following below, during ALC operation, changes at ±1dB step, and becomes 16 stages switch specs. #1. Ri=55kΩ(Typ.), Rf=245kΩ(Typ.) @Gain=13dB #2. Ri=60kΩ ...
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... U1 Mono Class-D Audio Amplifier Printed-Circuit Board, 1 PCB1 BD5468GUL EVM ●About the external part ① Input coupling capacitor (C1, C2) Input coupling capacitor is 0.1μF. Input impedance during maximum gain 13dB is 55kΩ (Typ.). A high-pass filter is composed by the input coupling capacitor and the input impedance. ...
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... BD5468GUL ●Evaluation Board PCB Layer www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. TOP Layer Silk Pattern BD5468GUL TOP Layer Bottom Layer 12/19 Technical Note 2010.09 - Rev.A ...
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... BD5468GUL ●About IC Thermal Design The IC Characteristics has a big relation with the temperature that will be used, to exceed the maximum tolerance junction temperature, can deteriorate and destroy it. Instant destruction and long-time operation, from these 2 standpoints, there is a need to be careful with regards to IC thermal. Please be careful with the next points. ...
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... BD5468GUL Evaluation data - Typical Characteristics (1/4) ●Evaluation data – Typical characteristics (1/4) Efficiency - Output power f=1kHz, RL=8Ω+33uH 90 80 VDD = 3. VDD = 2. 0.1 0.2 0.3 0.4 0.5 0.6 Output Power [W] Fig.5 Figure.1 Supply Current vs Output power f=1kHz, RL=8Ω+33uH 300 250 200 VDD = 3.6V 150 VDD = 2.5V 100 ...
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... BD5468GUL Evaluation data - Typical Characteristics (2/4) ●Evaluation data – Typical characteristics (2/4) Output power vs Load Resistance THD+N=1%, f=1kHz, 400Hz-30kHz BPF 2.0 1.8 1.6 1.4 VDD = 5.0V 1.2 1.0 0.8 0.6 VDD = 3.6V 0.4 0.2 0 RL[Ω] Fig.13 Figure.9 Output Power vs Power Supply RL=8Ω, f=1kHz, 400Hz-30kHz BPF 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2 2.5 3 3.5 4 VDD[V] Fig.14 Figure.10 Total Harmonic Distortion + Noise vs Output Power RL=8Ω ...
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... BD5468GUL Evaluation data - Typical Characteristics (3/4) ●Evaluation data – Typical characteristics (3/4) Total Harmonic Distortion + Noise vs Frequency VDD=2.5V, RL=8Ω, 400Hz-30kHz BPF 10 Po=25mW Po=100mW Po=150mW Po = 100mW 25mW 0.1 0.01 10 100 1k Frequency [Hz] Fig.20 Figure.16 Gain vs Frequency RL=8Ω, Vin=0.5Vpp, 400Hz-30kHz BPF VDD=2.5V 4 VDD=3.6V VDD=5.0V ...
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... BD5468GUL ●Evaluation data – Typical characteristics (4/4) Evaluation data - Typical Characteristics (4/4) ALC Limit Operation Waveform f=1kHz 2V / Div. INPUT OUTPUT - Time [msec] Fig.28 Figure.24 Waveform during Start- Div. INPUT Ton ( Wake-up Time) OUTPUT -0.2 0 0.2 0.4 0.6 Time [msec] Fig.30 Figure.26 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD5468GUL ●Notes for use (1) The numerical value and the data of the mention are a design representative value and are not the one which guarantees the value. ( convinced that it should recommend application circuit example but in case of use, we request the confirmation of the characteristic more sufficiently. When changing an external part fixed number and becoming use, it considers sprawl of the external part and our company's LSI including the transition characteristic in addition to the stillness characteristic and so on, see and fix an enough margin ...
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... BD5468GUL ●Ordering part number Part No. Part No. VCSP50L1 (BD5468GUL) 1PIN MARK 1.70±0.05 0. φ 0.25±0.05 0. φ 0.15)INDEX POST 0.35±0.05 P=0.5×2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package GUL :VCSP50L1 <Tape and Reel information> ...
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No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...