|
BELLING |
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+
IN-
VO+
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
|