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BL6305 Dataheets PDF



Part Number BL6305
Manufacturers BELLING
Logo BELLING
Description 2.6 Watt Mono Filter-Free Class-D Audio Power Amplifier
Datasheet BL6305 DatasheetBL6305 Datasheet (PDF)

BL6305 2.6 Watt Mono Filter-Free Class-D Audio Power Amplifier Features Efficiency With an 8-Ω Speaker: 88% at 400 mW 80% at 100 mW 2.1mA Quiescent Current 0.4µA Shutdown Current Optimized PWM Output Stage Eliminates LC Output Filter Internally Generated 250-kHz Switching Frequency Eliminates Capacitor and Resistor Improved PSRR (−75 dB) and Wide Supply Voltage (2.5 V to 5.5 V) Eliminates Need for a Voltage Regulator Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capaci.

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BL6305 2.6 Watt Mono Filter-Free Class-D Audio Power Amplifier Features Efficiency With an 8-Ω Speaker: 88% at 400 mW 80% at 100 mW 2.1mA Quiescent Current 0.4µA Shutdown Current Optimized PWM Output Stage Eliminates LC Output Filter Internally Generated 250-kHz Switching Frequency Eliminates Capacitor and Resistor Improved PSRR (−75 dB) and Wide Supply Voltage (2.5 V to 5.5 V) Eliminates Need for a Voltage Regulator Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor Improved CMRR Eliminates Two Input Coupling Capacitors MSOP8, SOP8, DFN8 package General Description The BL6305 is a 2.6W high efficiency filter-free class-D audio power amplifier that requires only three external components. Features like 88% efficiency, −75dB PSRR, and improved RF-rectification immunity make the BL6305 ideal for cellular handsets. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the BL6305. Applications Mobile phone、PDA MP3/4、PMP Portable electronic devices Order Information Part Number BL6305MM BL6305DN BL6305SO Pin Diagrams Package MSOP8 DFN8 SOP8 Shipping 3000 pcs / Tape & Reel 3000 pcs / Tape & Reel 2500 pcs / Tape & Reel http://www.belling.com.cn - Page 1 of 9 - Ver1.2 BL6305 Pin Description Pin # 1 2 3 4 5 6 7 8 Name SDB IN+ INVO+ VDD PGND VO- Description Shutdown terminal (low active) NC (No internal connection) Positive differential input Negative differential input Positive BTL output Power Supply Power Ground Negative BTL output Function Block Diagram Av1 = 170k/Ri 170k (4) IN- Amp1 (3) IN+ 170k (1) ShutDown SDB Control 300k Bias & Reference PWM Modulator and Power Driver Av2 = 2 V/V OSC & RAMP Start up & Protection OC Detect s: Total Voltage Gain = Av1 × Av2 = 2 × 170k RI Figure 1. Function Block Diagram http://www.belling.com.cn - Page 2 of 9 - (6) VDD (8) Vo(5) Vo+ (7) GND Note Ver1.2 Application Circuit BL6305 Ri Differential Input Ri Vi- - + Vi+ + - PWM & BTL (Closed Loop) VDD To Battery Cs Vo+ Vo- GND SDB Bias & ShutDown OSC & RAMP Figure 2. BL6305 Application Schematic With Differential Input Ci Ri Differential Input Ci Ri Vi- - + Vi+ + - PWM & BTL (Closed Loop) VDD To Battery Cs Vo+ Vo- GND SDB Bias & ShutDown OSC & RAMP Figure 3. BL6305 Application Schematic With Differential Input and Input Capacitors Ci Sin le-ended Input Ri Vi- - + VDD To Battery Cs Vo+ PWM & BTL (Closed Loop) Vi+ + - Ci Ri Vo- GND SDB Bias & ShutDown OSC & RAMP Figure 4. BL6305 Application Schematic With Single-Ended Input http://www.belling.com.cn - Page 3 of 9 - Ver1.2 Electrical Characteristics The following specifications apply for the circuit shown in Figure 5. TA = 25 , unless otherwise specified. Symbol Parameter Conditions ISD Shutdown Current IQ Quiescent Current VOS Output Offset Voltage PSRR Power Supply Rejection Ratio CMRR Common Mode Rejection Ratio FSW Modulation frequency VIN=0V, VSDB=0V, No Load VDD = 2.5V, VIN = 0V, No Load VDD = 3.6V, VIN = 0V, No Load VDD = 5.5V, VIN = 0V, No Load VIN = 0V, AV = 2V/V, VDD = 2.5V to 5.5V VDD = 2.5V to 5.5V VDD = 2.5V to 5.5V, VIC = VDD/2 to 0.5V, VIC = VDD/2 to VDD - 0.8V VDD = 2.5V to 5.5V AV Voltage gain VDD = 2.5V to 5.5V RSDB ZI TWU rDS(on) Resistance from SDB to GND Input impedance Wake-up time from shutdown VDD = 3.6V VDD = 2.5V Drain-Source resistance (on-state) VDD = 3.6V VDD = 5.5V Min. 200 320k RI 160 BL6305 Spec Typ. 0.4 1.8 2.1 2.5 Units Max. 2 uA 3.2 mA 4.5 2 25 mV -75 dB -68 dB 250 340k RI 300 170 1 700 500 400 300 360k RI 180 kHz V/V kΩ kΩ mS mΩ Operating Characteristics VDD = 5V, RI = 150kΩ, TA = 25 , unless otherwise specified. Symbol Parameter Conditions PO Output Power Total Harmonic THD+N Distortion + Noise THD+N=10%, f=1KHz, RL = 4Ω THD+N=1%, f=1KHz, RL = 4Ω THD+N=10%, f=1KHz, RL = 8Ω THD+N=1%, f=1KHz, RL = 8Ω Po=1.0Wrms, f=1kHz, RL = 8Ω SNR Signal-to-Noise ratio VDD=5V, Po=1.0Wrms, RL = 8Ω Min. Spec Typ. 2.65 2.15 1.65 1.33 Units Max. W 0.21 % 95 dB VDD = 3.6V, RI = 150kΩ, TA = 25 , unless otherwise specified. Symbol Parameter Conditions PO Output Power THD+N=10%, f=1KHz, RL = 4Ω THD+N=1%, f=1KHz, RL = 4Ω THD+N=10%, f=1KHz, RL = 8Ω THD+N=1%, f=1KHz, RL = 8Ω http://www.belling.com.cn - Page 4 of 9 - Min. Spec Typ. 1.35 1.08 0.85 0.69 Units Max. W Ver1.2 Total Harmonic THD+N Po=0.5Wrms, f=1kHz, RL = 8Ω Distortion + Noise KSVR Vn Supply ripple VDD = 3.6V, input ac-grounded with CI = 2uF rejection ratio f=217Hz, V(Ripple)=200mVPP VDD = 3.6V, input ac-grounded No weighting Output voltage noise with CI = 2uF, f=20~20kHz A weighting Common Mode CMRR Rejection Ratio VDD = 3.6V, VIC = 1 VPP, f=217Hz BL6305 0.21 % -67 dB 87 uVRMS 65 -70 dB VDD = 2.5V, RI = 150kΩ, TA = 25 , unless otherwise specified. Symbol Parameter Conditions PO Output Power Total Harmonic THD+N Distortion + Noise THD+N=10%, f=1KHz, RL = 4Ω THD+N=1%, f=1KHz, RL = 4Ω THD+N=10%, f=1KHz, RL = 8Ω THD+N=1%, f=1KHz.


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