BL6306MM

BL6306 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 3.8mA 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 BL6306 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 BL6306 ideal for cellular handsets. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the BL6306. Applications    Mobile phone、PDA、MID MP3/4、PMP Portable electronic devices Order Information Part Number Package Shipping BL6306MM MSOP8 3000 pcs / Tape & Reel BL6306SO SOP8 2500 pcs / Tape & Reel BL6306DN DFN8 3000 pcs / Tape & Reel Pin Diagrams http://www.belling.com.cn - Page 1 of 10 - Ver1.3 BL6306 Pin Description Pin # Name Description 1 SDB Shutdown terminal (low active) 2 NC NC (No internal connection) 3 IN+ Positive differential input 4 IN- Negative differential input 5 VO+ Positive BTL output 6 VDD Power Supply 7 PGND Power Ground 8 VO- Negative BTL output Function Block Diagram Av1 = 150k/Ri (6) VDD 150k (4) IN- (8) Vo- PWM Modulator and Power Driver Amp1 (3) IN+ (5) Vo+ Av2 = 2 V/V (7) GND 150k (1) SDB ShutDown Control 300k Start up & Protection Bias & Reference OSC & RAMP Notes: Total Voltage Gain  Av1  Av 2  2  OC Detect 150k RI Figure 1. Function Block Diagram http://www.belling.com.cn - Page 2 of 10 - Ver1.3 BL6306 Application Circuit Ri Vi- + Differential Input Vi+ + PWM & BTL (Closed Loop) VDD To Battery Cs Vo+ Vo- Ri GND Bias & ShutDown SDB OSC & RAMP Figure 2. BL6306 Application Schematic With Differential Input Ci Ri Vi- + Differential Input Vi+ Ci + PWM & BTL (Closed Loop) VDD To Battery Cs Vo+ Vo- Ri GND Bias & ShutDown SDB OSC & RAMP Figure 3. BL6306 Application Schematic With Differential Input and Input Capacitors Ci Single-ended Input Ri Vi- + Vi+ + PWM & BTL (Closed Loop) VDD To Battery Cs Vo+ Vo- Ri Ci GND SDB Bias & ShutDown OSC & RAMP Figure 4. BL6306 Application Schematic With Single-Ended Input http://www.belling.com.cn - Page 3 of 10 - Ver1.3 BL6306 Absolute Maximum Ratings Supply Voltage -0.3V to 6V Input Voltage -0.3V to VDD+0.3V Storage Temperature -65℃ to +150℃ Operating Temperature Range -40℃ to +85℃ NOTE: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Rating indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics The following specifications apply for the circuit shown in Figure 5. TA = 25℃, unless otherwise specified. Symbol ISD IQ VOS Parameter Shutdown Current Quiescent Current Output Offset Voltage PSRR Power Supply Rejection Ratio Conditions Spec Min. Typ. Max. VIN=0V, VSDB=0V, No Load 0.4 2 VDD = 2.5V, VIN = 0V, No Load 2.2 3.2 VDD = 3.6V, VIN = 0V, No Load 2.6 VDD = 5.5V, VIN = 0V, No Load 3.8 8 2 25 VIN = 0V, AV = 2V/V, VDD = 2.5V to 5.5V VDD = 2.5V to 5.5V Units uA mA mV -75 dB -68 dB VDD = 2.5V to 5.5V, CMRR Common Mode Rejection Ratio VIC = VDD/2 to 0.5V, VIC = VDD/2 to VDD - 0.8V FSW Modulation frequency VDD = 2.5V to 5.5V 200 250 300 kHz AV Voltage gain VDD = 2.5V to 5.5V 270k RI 300k RI 330k RI V/V RSDB ZI TWU rDS(on) Resistance from SDB to GND 300 Input impedance Wake-up time from shutdown 135 150 VDD = 3.6V 32 VDD = 2.5V 700 Drain-Source resistance (on-state) VDD = 3.6V 500 VDD = 5.5V 400 VSDIH Shutdown Voltage Input High VSDIL Shutdown Voltage Input Low http://www.belling.com.cn kΩ 165 mS mΩ 1.3 V 0.4 - Page 4 of 10 - kΩ V Ver1.3 BL6306 Operating Characteristics  VDD = 5V, RI = 150kΩ, TA = 25℃, unless otherwise specified. Symbol PO THD+N SNR  Output Power Total Harmonic Distortion + Noise Spec Conditions Min. Typ. Max. Units THD+N=10%, f=1KHz, RL = 4Ω 2.60 THD+N=1%, f=1KHz, RL = 4Ω 2.10 THD+N=10%, f=1KHz, RL = 8Ω 1.60 THD+N=1%, f=1KHz, RL = 8Ω 1.30 Po=1.0Wrms, f=1kHz, RL = 8Ω 0.21 % 91 dB Signal-to-Noise ratio VDD=5V, Po=1.0Wrms, RL = 8Ω W VDD = 3.6V, RI = 150kΩ, TA = 25℃, unless otherwise specified. Symbol PO THD+N KSVR Vn CMRR  Parameter Parameter Output Power Total Harmonic Distortion + Noise Spec Conditions Min. THD+N=1%, f=1KHz, RL = 4Ω 1.08 THD+N=10%, f=1KHz, RL = 8Ω 0.85 THD+N=1%, f=1KHz, RL = 8Ω 0.69 Po=0.5Wrms, f=1kHz, RL = 8Ω 0.21 % -65 dB rejection ratio f=217Hz, V(Ripple)=200mVPP Rejection Ratio Units 1.35 VDD = 3.6V, input ac-grounded with CI = 2uF Common Mode Max. THD+N=10%, f=1KHz, RL = 4Ω Supply ripple Output voltage noise Typ. VDD = 3.6V, input ac-grounded No weighting 100 with CI = 2uF, f=20~20kHz 75 A weighting VDD = 3.6V, VIC = 1 VPP, f=217Hz W uVRMS -70 dB VDD = 2.5V, RI = 150kΩ, TA = 25℃, unless otherwise specified. Symbol PO THD+N Parameter Output Power Total Harmonic Distortion + Noise http://www.belling.com.cn Conditions Spec Min. Typ. THD+N=10%, f=1KHz, RL = 4Ω 0.60 THD+N=1%, f=1KHz, RL = 4Ω 0.51 THD+N=10%, f=1KHz, RL = 8Ω 0.40 THD+N=1%, f=1KHz, RL = 8Ω 0.33 Po=0.2Wrms, f=1kHz, RL = 8Ω 0.21 - Page 5 of 10 - Max. Units W % Ver1.3 BL6306 Test Circuit Ci Ri IN+ 2uF Signal input from measurement VO+ 150K Vin BL6306 Ci Ri IN2uF 30KHz LPF RL Output to measurement VO VO- 150K Shutdown signal SDB VDD GND C1 2uF Power + Supply - Figure 5. BL6306 test set up circuit VO+ 100 47nF VO- VO 100 47nF 30kHz LPF Figure 6. 30-kHz LPF for BL6306 test Notes: 1>. CS should be placed as close as possible to VDD/GND pad of the device 2>. Ci should be shorted for any Common-Mode input voltage measurement 3>. A 33uH inductor should be used in series with RL for efficiency measurement 4>. The 30 kHz LPF (shown in figure 5) is required even if the analyzer has an internal LPF Component Recommended Due to the weak noise immunity of the single-ended input application, the differential input application should be used whenever possible. The typical component values are listed in the table: RI CI CS 150 k 3.3 nF 2 uF http://www.belling.com.cn - Page 6 of 10 - Ver1.3 BL6306 (1) CI should have a tolerance of ±10% or better to reduce impedance mismatch. (2) Use 1% tolerance resistors or better to keep the performance optimized, and place the RI close to the device to limit noise injection on the high-impedance nodes. Input Resistors (RI) & Capacitors (CI) The input resistors (RI) set the total voltage gain of the amplifier according to Eq1 Gain  2  150k RI V    V  Eq1 The input resistor matching directly affects the CMRR, PSRR, and the second harmonic distortion cancellation. If a differential signal source is used, and the signal is biased from 0.5V ~ VDD-0.8V (shown in Figure2), the input capacitor (CI) is not required. If the input signal is not biased within the recommended common-mode input range in differential input application (shown in Figure3), or in a single-ended input application (shown in Figure4), the input coupling capacitors are required. If the input coupling capacitors are used, the RI and CI form a high-pass filter (HPF). The corner frequency (fC) of the HPF can be calculated by Eq2 fC  1 2  R I  C I Hz  Eq 2 Decoupling Capacitor (CS) A good low equivalent-series-resistance (ESR) ceramic capacitor (CS), used as power supply decoupling capacitor (CS), is required for high power supply rejection (PSRR), high efficiency and low total harmonic distortion (THD). CS is 2µF, placed as close as possible to the device VDD pin. http://www.belling.com.cn - Page 7 of 10 - Ver1.3 BL6306 Package Dimensions SOP8 http://www.belling.com.cn - Page 8 of 10 - Ver1.3 BL6306 MSOP8 http://www.belling.com.cn - Page 9 of 10 - Ver1.3 BL6306 DFN8 SYMBOL MILLIMETER MIN NOM MAX A 0.70 0.75 0.80 A1 - 0.02 0.05 b 0.25 0.30 0.35 c 0.18 0.20 0.25 D 2.90 3.00 3.10 D2 2.50REF e 0.65BSC Nd 1.95BSC E 2.90 E2 http://www.belling.com.cn - Page 10 of 10 - 3.00 3.10 1.55REF L 0.30 0.40 0.50 h 0.20 0.25 0.30 Ver1.3