TFA9810T Fast Delivery |IC PHOENIX CO.,LIMITED

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TFA9810T
Stereo full-bridge audio amplifier 2 x 12 W
General descriptionThe TFA9810 is a two-channel power comparator for high-efﬁciency class D audio
ampliﬁer systems. It contains two full-bridge Bridge-Tied Load (BTL) power stages, drive
logic, protection control logic and full differential input comparators. By using this power
comparator a compact closed-loop self-oscillating digital ampliﬁer system or open-loop
system can be built. The TFA9810 does not require a heat sink and operates using an
asymmetrical supply voltage. Features Stereo full-bridge power comparator for class D audio ampliﬁer applications No external heat sink required Operating voltage range: asymmetrical from 8 V to 20 V Thermally protected Zero dead-time switching Current-limiting (no audible interruptions) Applications Self-oscillating or open-loop class D audio ampliﬁer applications Flat-panel television sets Flat-panel monitors Multimedia systems Wireless speakers High-end CRT television sets Quick reference data A9810
Stereo full-bridge audio ampliﬁer 2 x 12 W
Rev. 03 — 20 February 2008 Product data sheet
Table 1. Quick reference data
Tamb = 25 °C; VP = 12 V; fosc = 550 kHz; Figure 33 unless otherwise speciﬁed supply voltage VP = VDDPx − VSSPx 812 20 V
Ioff off-state current off mode - 110 200 μA quiescent current with load, ﬁlter and
snubbers connected
-35 45 mA
ηpo output power
efﬁciency
output powerx9W into8Ω;
Po=Po(nom) 89 - %
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W Ordering information
Po(RMS) RMS output power RL = 8 Ω; VP = 12 V;
THD=10 %;Two channel
driven; no heat sink
required. 9.5 - W output power VP = 12 V; RL = 8Ω -- - -
THD = 10 % 8.5 9.5 - W
THD = 1 % 6.5 7.5 - W
VP = 14 V; RL = 8 Ω;
THD=10 %; thermally
limited
-15 - W
VP = 16 V; RL = 8 Ω;
THD=10 %; thermally
limited
-15 - W
VP = 12 V; RL = 6Ω;
THD=10 %; thermally
limited
-12 - W
VP = 12 V; RL = 4 Ω;
THD= 10 %; thermally
limited
-15 - W
Table 1. Quick reference data …continued
Tamb = 25 °C; VP = 12 V; fosc = 550 kHz; Figure 33 unless otherwise speciﬁed
Table 2. Ordering information
TFA9810T SO32 SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W Block diagram
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W Pinning information
7.1 Pinning
The SO32 package has four corner leads. These leads (1, 16, 17, and 32) are internally
connectedto the die pad and mustbe connectedto VSSAin the application. Together with
the applied copper area on the Printed Circuit Board (PCB) these leads determine the
ambient temperature, which affects the thermal resistance of the junction.
7.2 Pin description
Table 3. Pin description
VSSD(HW) 1, 16, 17,
Negative digital supply voltage and handle wafer
IN1P 2 Positive input comparator channel 1
IN1N 3 Negative input comparator channel 1
VDDA1 4 Positive analog supply voltage channel 1
VSSA1 5 Negative analog supply voltage channel 1
SO/OL 6 SO/OL input enables self-oscillating / open-loop conﬁguration
ENABLE 7 Enable input to switch between SLEEP and OPERATING
CDELAY 8 CDELAY input determines the switch on/off timing
n.c. 9 Not connected
DIAG 10 Diagnostic output; open drain
TEST 11 Test signal input; for testing purposes only
VSSA2 12 Negative analog supply voltage channel 2
VDDA2 13 Positive analog supply voltage channel 2
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W Functional description
8.1 General
The TFA9810 is a dual-switching power comparator. It is the main building block for a
stereo high-efﬁciency Class D audio power ampliﬁer system. It contains two full-bridge
BTL power stages, drive logic, protection-control logic and full differential input
comparators and references (see Figure 1). By using this power comparator a compact
closed-loop self-oscillating digital ampliﬁer system or open-loop system can be built. A
second-order low-pass ﬁlter converts the Pulse Width Modulation (PWM) output signal
into an analog audio signal across the speaker.
8.2 Interfacing
The pins ENABLE and SO/OL control the operating mode of the TFA9810. Both the
ENABLE and the SO/OL pins refer to VSSD(HW).
When the SO/OL pin is connected to VSSA the TFA9810 is in self-oscillating mode: when
the SO/OL pin is ﬂoating the TFA9810 is in open-loop mode.
The TEST pin needs to be connected to VDDA in both situations.
The device has two modes: SLEEP and OPERATING.
IN2N 14 Negative input comparator channel 2
IN2P 15 Positive input comparator channel 2
STAB2 18 Decoupling of internal 11 V regulator for channel 2 drivers
VSSP2 19 Negative power-supply voltage channel 2
BOOT2N 20 Bootstrap high-side driver negative output channel 2
OUT2N 21 Negative output channel 2
BOOT2P 22 Bootstrap high-side driver positive output channel 2
OUT2P 23 Positive output channel 2
VDDP2 24 Positive supply voltage power channel 2
VDDP1 25 Positive power supply voltage channel 1
OUT1P 26 Positive output channel 1
BOOT1P 27 Bootstrap high-side driver positive output channel 1
OUT1N 28 Negative output channel 1
BOOT1N 29 Bootstrap high-side driver negative output channel 1
VSSP1 30 Negative supply voltage power channel 1
STAB1 31 Decoupling of internal 11 V regulator for channel 1 drivers
Table 3. Pin description …continued
Table 4. SO/OL connections
VSSD(HW) Self-oscillating
Open Open-loop
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
In SLEEP mode the TFA9810 is not biased and has a very low supply current.
When the TFA9810 is set to OPERA TING mode the device is started via the start-up
sequence, which provides a pop-free start-up behavior. After start-up the reference
voltages STAB are present and the outputs start switching.
8.3 Input comparators
The input stages have a differential input and are optimized for low noise and low offset.
This results in maximum ﬂexibility in the application.
8.3.1 Operating in self-oscillating conﬁguration
The inputs (IN1P, IN1N, IN2P, IN2N)of the comparators are internally settoa voltage level
of 0.5VP, but only during the start-up sequence. In operating mode the inputs are
high-ohmic.
8.3.2 Operating in open-loop conﬁguration internal voltages are appliedto the inputs. The input pins (IN1P, IN1N, IN2P, IN2N) are
pulled down to VSSA level by internal resistors.
8.4 Diagnostic
The DIAG output is an open-drain output. The maximum current is 2 mA. Whenever one the protectionsis triggered the DIAG outputis activated low. The DIAG output refersto
VSSD.
8.5 Protections
Overtemperature, overcurrent, overvoltage, undervoltage, overdissipation sensors, and
window protection are included in the TFA9810. When one of these sensors exceeds its
threshold level either the output power stage is switched off and the outputs (OUT1N,
OUT1P , OUT2N, OUT2P) become ﬂoating, or the TFA9810 shuts down and starts up
immediately. OverTemperature Protection (OTP)
If the junction temperature (Tj) exceeds a threshold level of about 150 °C then the
outputs become ﬂoating. The device will start switching again after5μs and when the
temperature is below 150 °C. This is thermal limitation without audible interruptions. OverCurrent Protection (OCP)
If the output current exceeds the maximum output current threshold level the output
becomes ﬂoating. The device will start switching again after 5 μs. This is current
limitation without audible interruptions.
Table 5. Start-up
ENABLE < 0.8 V SLEEP
ENABLE > 3 V OPERATING
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W OverVoltage Protection (OVP)
When the supply voltage applied to the TFA9810 exceeds the maximum supply
voltage threshold level the device will shut down. The device will restart when the
supply voltage is within the operating range. UnderVoltage Protection (UVP)
When the supply voltage applied to the TFA9810 falls below the minimum supply
voltage threshold level the device will shut down. The device will restart when the
supply voltage is within the operating range. OverDissipation Protection (ODP)
The ODP in the TFA9810 is a combination of two protections. Exceeding a
temperature threshold level of 135 °C an internal pre-warning is generated. When an
overcurrent is detected during the pre-warning the device will shut down. When the
ENABLE pin is high the TFA9810 will restart automatically. The restart sequence
(switch-off → switch-on) will take 200 ms to 500 ms. Window Protection (WP)
During start-up,if oneof the outputsis shortedto VSSor VDD the device will not start.
Thisisan effective measureto protect the device against shorts between the outputs
(before the ﬁlter) and the groundor supply lines. The supply mustbe switchedoff prior
to removing any short. The WP protects the device against failure during board
assembly.
Table 6. Overview protections
OTP Tj > 150°C LOW Floating Automatic, after 5 μs and Tj < 150°C
OCP IO > IORM LOW Floating Automatic, after 5 μs and IO < IORM
OVP VP > 20 V LOW Floating Restart (switch-off → switch-on when VP < 20 V)
UVP VP < 8 V LOW Floating Restart (switch-off → switch-on when VP > 8 V)
ODP Tj > 135 °C and IO > IORM LOW Floating Restart (switch-off → switch-on when< 135 °CorIO VDDA - 1 V or
OUTX < VSSA + 1 V
LOW
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
8.6 Start-up sequence Internal circuitry
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
10. Limiting values
Table 7. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). supply voltage asymmetrical −0.3 +23 V
IORM repetitive peak output current 3 - A junction temperature - +150 °C
Tstg storage temperature −55 +150 °C
Tamb ambient temperature −40 +85 °C
Pmax maximum power dissipation - 2.5 W
NXP Semiconductors TFA9810
Audio ampliﬁer 2 x 12 W
11. Thermal characteristics
[1] Measured in a JEDEC high K-factor test board (standard EIA/JESD 51-7) in free air with natural convection.
[2] Strongly depends on where the measurement is taken on the case.
12. Characteristics
12.1 Static characteristics voltage on pin x DIAG VSS − 0.3 +12 V
IN1P - IN1N −12 +12 V
IN2P - IN2N −12 +12 V
all other pins VSS − 0.3 VDD + 0.3 V
Vesd electrostatic discharge voltage VINX with
respect to
other pins
−1500 +1500 V
all other pins −2000 +2000 V
Table 7. Limiting values …continued
In accordance with the Absolute Maximum Rating System (IEC 60134).
Table 8. Characteristics
Rth(j-a) thermal resistance
from junction to
ambient
SO32. JEDEC test board
SO32. Two-layer application
board
[1]-
K/W
K/W
Ψj-lead thermal
characterization
parameter from
junction to lead
SO32 [1] 30 K/W
Ψj-top thermal
characterization
parameter from
junction to top of
package
SO32 [1][2] 4 8 K/W
Table 9. Static characteristics
Tamb = 25 °C; VP = 12 V; fosc = 550 kHz; Figure 33 unless otherwise speciﬁed
Supply voltage supply voltage VP = VDDPx − VSSPx 8 1220V
Ioff off-state current off mode - 110 200 μA quiescent current with load, ﬁlter, and snubbers
connected 3545mA
ENABLE input
VIL LOW-level input voltage with respect to VSSD −0.3 - +0.8 V
VIH HIGH-level input voltage with respect to VSSD 3- VP V

Partno	Mfg	Dc	Qty	Available	Descript
TFA9810T	PHILIPS	N/a	46	avai	Stereo full-bridge audio amplifier 2 x 12 W