Document
BL6211
1.25 Watt Fully Differential Audio Power Amplifier With Internal Feedback Resistors
1 FEATURES
Fully differential amplifier
Improved PSRR at 217Hz(VDD>3.0V)
86dB (typ)
Power output at 5.0V & 1% THD
1.25W (typ)
Power output at 3.6V & 1% THD
0.6W (typ)
Ultra low shutdown current
0.01 A (typ)
Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
Thermal overload protection circuitry
No output coupling capacitors, bootstrap capacitors required
Unity-gain stable
External gain configuration capability
Available in space-saving package: 9-bump micro SMD and 8-pin MSOP8
2 GENERAL DESCRIPTION
The BL6211 is a fully differential audio power amplifier designed for portable communication device applications. It is capable of delivering 1.25 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5V battery voltage. It operates from 2.2 to 5.5V. Features like 86dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving 8-pin MSOP8 and 9-bump micro SMD package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown mode make BL6211 ideal for wireless handsets. The BL6211 is unity-gain stable, and the gain can be configured by external input resistors and internal feedback resistors.
3 APPLICATIONS
Wireless handsets Portable audio devices PDAs, Handheld computers
http://www.belling.com.cn
4 TYPICAL APPLICATION
BL6211
Differential Audio Input
0.39 F Ci
20k Ri
VIH VIL
CB 1 F C B is optional
Ci 0.39 F
Ri 20k
CS 1F
VDD R f
40k IN-
-
SHUTDOWN BYPASS
Bias VDD/2 Circuitry
+ BL6211
-
+
IN+ 40k
GND R f
VO1 VO2
RL 8
Figure 1
Typical Audio Amplifier Application Circuit
5 ORDER INFORMATION
Table 1. Order information
Part Number BL6211ITLX BL6211MM
Marking AAG ABG
Package 9 Bump micro SMD
8-pin MSOP8
Shipping 3000 pcs / Tape & Reel 3000 pcs / Tape & Reel
http://www.belling.com.cn
6 PIN DESCRIPTIONS 6.1 Pin Diagram (Top View)
BL6211
Mini Small O utline (MSO P8) Package (Top View)
SHUTDOWN 1 BYP ASS 2 3 IN+ IN- 4
8 VO2 7 GND 6
VDD 5 VO1
MSO P8 Marking
EG ABG
E - Die Run Traceability G - Date Code ABG - BL6211MM ROHS
Figure 2
Pin Diagram of BL6211
6.2 Pin Definitions and Functions
Table 2. Pin Definitions and Functions
MSOP8 1
9-Bump micro SMD
C3
2 C1
3 A3 4 A1
Symbol SHUTDOWN
BYPASS
IN+ IN-
Type
Functions
I Shutdown Pin, active low.
Common mode voltage. Connect a bypass I capacitor to GND for common mode voltage
filtering. The bypass capacitor is optional.
I Positive differential input.
I Negative differential input.
http://www.belling.com.cn
MSOP8
5 6 7 8
9-Bump micro SMD
A2
B3
B1,B2
C2
Symbol
VO1 VDD GND VO2
Type
Functions
O Positive differential output. I Power supply I Ground. O Negative differential output.
BL6211
7 OPERATION CONDITIONS AND ELECTRICAL CHARACTERISTICS
7.1 Absolute Maximum Ratings (note 1)
Supply voltage, VDD……………………………………………-0.3V to 6.0V Input voltage……….