BL6331CP Datasheet, PDF (1/12 Pages) SHANGHAI BELLING CO., LTD. – Optimized PWM Output Stage Eliminates LC Output Filter

BL6331
BL6331
MONAURAL 3W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
Features
Professional non-clip output control function:
Maximum non-clip output
800mW(VDD=4.2v, RL=8Ω,NC1 mode)
Four mode can be selected with CTRL
terminal: NC1( NonClip1), NC2 (nonClip2),
NC_OFF (NonClip-off), shutdown
Maximum output (work in nonclip-off mode)
3W（VDD=5.0V, RL=4Ω, THD+N=10%）
0.82W（VDD=3.6V, RL=8Ω, THD+N=10%）
THD+N
0.06% (VDD = 3.6V, RL=8Ω, PO=0.4W, 1kHZ)
Efficiency With an 8Ω Speaker:
88% at 400 mW
80% at 150 mW
Optimized PWM Output Stage Eliminates LC
Output Filter
Improved PSRR (−75 dB) and Wide Supply
Voltage (2.5 V to 5.5 V) Eliminates Need for
a Voltage Regulator
Over-current and Thermal Protection function
Low voltage Malfunction prevention function
Available in space-saving package:
9-bump WLCSP
Applications
Mobile phone, PDA
MP3/4, PMP, GPS
Portable electronic devices
Pin Diagrams
1
2
3
A ^IN+
VDD
VO+
B ^GND
VREF
PGND
C ^IN-
CTRL
VO-
top view
General Description
BL6331 is a 3-W (VDD=5.0V, RL=4Ω) high efficiency
filter-free class-D audio power amplifier in a wafer
chip scale package (WLCSP).
BL6331 has a “Professional non-clip output control
circuit” which reducing distortion of output signal due
to either the over level input signal or power supply
voltage down with battery,
Features like 88% efficiency, −75dB PSRR, and
improved RF-rectification immunity make the BL6331
ideal for cellular handsets. In cellular handsets, the
earpiece, speakerphone, and melody ringer can each
be driven by the BL6331.
Application Circuit
C1
1.0uF
differential
input
CTRL1
CTRL2
Rctrl1
Rctrl2
Rctrl3
CIN
33nF
33nF
CIN
Cctrl
0.1uF
IN+ ^VDD
VO+
IN-
BL6331
CTRL
VREF
AGND
VO-
PGND
C2
1.0uF
Pin Description
Notice: CTRL terminal function is described in page 4.
PIN # Name
Description
A1 IN+ Positive differential input
A2 VDD Power Supply
A3 VO+ Positive BTL output
B1 AGND Analog Ground
B2 VREF Bypass capacitor connected
B3 PGND Power Ground
C1 IN- Negative differential input
C2 CTRL Mode select
C3 VO- Negative BTL output
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Total 12 Pages