Transcript PCM186x * High Performance ADC with Universal Front End

TPA3140D2
INDUCTOR FREE 10W STEREO CLASS-D AMPLIFIER
TPA3140D2
Inductor Free Class-D Audio Amplifier
Features
Benefits
• Inductor Free operation
• Very Low BOM cost and small board space
• Advanced Non-Clipping Gain Limiter (AGL)
• Low THD at high power and speaker protection
• Closed Loop Power Stage
• High Fidelity Audio, Low PSRR
• Speaker Guard DC Protection
• Protect speaker against DC failure
• Very Low Idle Losses
• Ideal for battery operation
• Low Voltage Support
• Works for 12V and 2S battery systems
• P2P TPA3140 (10WX2) and TPA3144 (6Wx2)
• Scalable Design
• TSSOP Package
• Flow through Layout
Applications
•
•
•
•
•
•
TV
BT Speakers
Wireless Speakers
Mini Speakers
USB Speakers
Musical instruments
Analog Input Mid Power Amplifier
70W
TPA3116D2
Power Output Per Channel
50W
50W Stereo
Pad up (heatsink)
30W
TPA3118D2
30W Stereo
TPA3132D2
TPA3110D2
25W Stereo
15W Stereo
Power Limiter
15W
TPA3004D2
12W Stereo
Volume Control
TPA3140
TPA3130D2
TPA3111D1
TPA3131D2
15W Stereo
10W Stereo, AGL
10W Stereo
10W Mono
TPA3144
TPA3113D2
5W
6W Stereo
6W Stereo, AGL
P2P Compatible
QFN PKG
P2P Compatible
TSSOP PKG
Inductor Free
TPA3003D2
3W Stereo
4.5V -15V
4.5V -26V
8V -26V
NEW
EXISTING
Preview
Competitive Landscape
TPA3110LD2 EMST NE3150
Reported
Customers
Switch Frequency
Strength
ON Bright
OB6220
Concern
Weakness
TPA3140
PAM8006
Chang Hong
N/A
CVT/Skyworth
CVT /KTC
310kHz
280kHz
260kHz
300kHz
280~384KHz
No
Yes
Yes
No
YES
25ns
30ns
No details
28nS
Edge rate control
No Details
3 ~ 4dB Margin
N/A
Spread Spectrum
PWM Slew Rate
EMI Performance
5 ~ 10dB
above the
limit
Margin
2 ~ 3dB Margin > 4dB Margin
(wrong setup)
AGL Function
No
No
No
Yes
YES
Low Voltage
Support
No
No
No
Yes
YES
Thermal Foldback
No
No
No
No
YES
Low Idle Losses
No
No
No
No
YES
4PCS Inductors Cost
4PCS Ferrite Bead cost
$0.16
$0.04
4
TPA3140 Block Diagram
Spread
spectrum
Integrated
PLL
Control
AGL
control
4.5V-14.4V
operation
60uV idle
channel
noise
Thermal
fold back
Low Idle losses
5
Device Summary
• TPA3140 is the next generation of TPA3110 family. Industry’s first mid power
(10Wx2) amplifier inductor free up to 1meter speaker cable.
• For A/C powered systems like TV, dock and PC speakers, TPA3140 with
Spread Spectrum provide excellent EMI improvement to replace inductors with
ferrite beads even for longer speaker cables as long as 1 meter but without
losing audio fidelity. This will help to save $0.12 of BOM. Device achieved
60uV idle channel noise.
• For battery powered systems like BT speakers, portable audio systems with
a minimum supply of 4.5V combined with low idle losses TPA3140 is ideal
for battery operations and provide longer battery life. TPA3110 require a
minimum of 8V.
• TPA3140 supports Auto Gain Limiter (AGL) allows non-clipping power limiting
and PLIMIT for clipping power limiting.
• Device has thermal fold back function which allows playback of audio at
lower levels when device temperature rises to thermal shutdown levels. It
simplifies the thermal design of the board.
TPA3140/44
Package
Power
Inductor
Free
Idle channel
noise
AGL
PLIMIT
Thermal
Fold back
TPA3140
10Wx2
YES
60uV
YES
YES
YES
TSSOP: 28-pin
9.7mmX 4.4 mm
TPA3144
6Wx2
YES
60uV
YES
YES
YES
TSSOP: 28-pin
9.7mmX 4.4 mm
TPA3140/4 Features
Speaker
Protection
Inductor Free
Operation
Improved EMI
Inductor free Operation
 Spread Spectrum
 Edge rate control
 Advanced Loop
Filter
Non-Clipping AGL
Non-clipping power limiter
 Variable Threshold
 Attack/Decay Rate
 Non-clipping
Benefits
 Protects Speaker
 Better THD
 Low Idle losses
Battery Friendly Operation
Results in :
 Lower voltage
(4.5V) Support
 Low Idle Losses
 Inductor free
 Efficient class-D operation
 Less charging
/discharging of inductors
Benefits
 Longer Battery
Operation
Start your eval today!
• Low cost and easy to use
Evaluation Modules (EVMs) are
available for each device in the
PCM186x family:
$99
– TPA3140D2EVM
– TPA3144D2EVM
• Visit estore.ti.com to order your
EVM today
TPA1340D2 EVM
TPA3140
Inductor Free Class-D Audio Amplifier
Features
• Inductor Free operation
• Advanced Non-Clipping Gain Limiter (AGL)
• Closed Loop Power Stage
Discovery
Questions
• Speaker-Guard DC Protection
• Ultra-Low Idle Loss
• Low Voltage Support (up to 4.5V) for 12V and 2S
Pricing &
Availability
battery systems
• Up to 10WX2 continuos power output
• 28 pin TSSOP package Support
TPA3140
Inductor Free Class-D Audio Amplifier
Features
Discovery
Questions
Pricing &
Availability
• Is this a new technology?
 Yes. inductor Free technology from TI
• What is inductor Free?
 Inductor Free technology supports inductor free
operation for most of the popular applications. Major BOM
cost savings
• What is AGL function?
 This Auto Gain Limiter is a special function in the
device that provides non-clipping power limiter. This
smart-PGA based smooth limiter protects speaker,
limits power and still deliver non-clipping low THD
• Is this the next gen TPA3110?
 The power levels are same as TPA3110. Feature set
and hence pricing is much different than TPA3110. So this
not price optimized replacement for TPA3110, but a
major improvement
TPA3140
Inductor Free Class-D Audio Amplifier
Features
Discovery
Questions
Pricing
Availability
Resources
Product Info: TPA3140
Pricing 1Ku: $1.2
Availability:
– Samples/EVM Nov 2014
– Full production April 2015
TPA3140
Inducto Free Class-D Audio Amplifier
• Why were these parts developed?
– To provide inductor free operation of class D for application that require low
BOM , low board space
– Protect small speakers
– Support battery operation
– High Performance amplifier with high fidelity sound
– Supports wall adapters without degrading performance
• What differentiates this part?
– iFree operation gives low BOM cost and saves board space
– Speaker guard Auto Gain Limiter protects small speaker and limit the power
without THD degradation
– Low idle losses, low voltage support (4.5V) will help with battery operation
– High PSRR to support poor supply