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ABSOLUT ..
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UA709PC ,HIGH-PERFORMANCE OPERATIONAL AMPLIFIERELECTRICAL CHARACTERISTICS: TA " +25''C, 19 V < VS < t15 V unless otherwise specified.
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ABSOLUT ..
UA709TC ,High-performance operational amplifierELECTRICAL CHARACTERISTICS: TA " +25''C, 19 V < VS < t15 V unless otherwise specified.
CHARACTER ..
TS4962IQT
3W filter-free Class D audio power amplifier with active low standby mode
January 2010 Doc ID 10968 Rev 8 1/44
TS49622.8 W filter-free mono class D audio power amplifier
Features Operating from VCC= 2.4 V to 5.5V Standby mode active low Output power: 2.8 W into 4 Ω and 1.7 W into Ω with 10% THD+N maximum and 5 V power
supply Output power: 2.2 W at 5 V or 0.7 W at 3.0V
into 4 Ω with 1% THD+N maximum Output power: 1.4 W at 5 V or 0.5 W at 3.0V
into 8 Ω with 1% THD+N maximum Adjustable gain via external resistors Low current consumption 2 mA at 3V Efficiency: 88% typical Signal to noise ratio: 85 dB typical PSRR: 63 dB typical at 217 Hz with 6 dB gain PWM base frequency: 280 kHz Low pop & click noise Thermal shutdown protection Available in DFN8 3x 3 mm package
Applications Cellular phones PDAs Notebook PCs
DescriptionThe TS4962 is a differential class-D BTL power
amplifier. It can drive up to 2.2 W into a 4 Ω load
and 1.4 W into an 8 Ω load at 5 V. It achieves
outstanding efficiency (88% typ.) compared to
standard AB-class audio amps.
The gain of the device can be controlled via two
external gain setting resistors. Pop & click
reduction circuitry provides low on/off switch noise
while allowing the device to start within 5 ms. A
standby function (active low) enables the current
consumption to be reduced to 10 nA typical.
Contents TS49622/44 Doc ID 10968 Rev 8
Contents Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 Application overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.2 Gain in typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3 Common-mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . 31
4.4 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.5 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.6 Wake-up time (tWU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.7 Shutdown time (t STBY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.8 Consumption in standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.9 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.10 Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.11 Several examples with summed inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.11.1 Example 1: dual differential inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.11.2 Example 2: one differential input plus one single-ended input . . . . . . . . 36
Demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
TS4962 Absolute maximum ratings and operating conditions
Doc ID 10968 Rev 8 3/44 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings Caution: this device is not protected in the event of abnormal operating conditions such as short-circuiting
between any one output pin and ground or between any one output pin and VCC, and between individual
output pins. All voltage values are measured with respect to the ground pin. The magnitude of the input signal must never exceed VCC + 0.3 V/GND - 0.3V. Exceeding the power derating curves during a long period will provoke abnormal operation. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins. The magnitude of the standby signal must never exceed VCC + 0.3 V/GND - 0.3V.
Table 2. Dissipation ratings
Absolute maximum ratings and operating conditions TS4962
4/44 Doc ID 10968 Rev 8
Table 3. Operating conditions For VCC between 2.4 V and 2.5 V, the operating temperature range is reduced to 0°C ≤Tamb≤ 70°C. For VCC between 2.4V and 2.5V, the common mode input range must be set at VCC/2. Without any signal on VSTBY, the device will be in standby. Minimum current consumption is obtained when VSTBY = GND. When mounted on a 4-layer PCB.
TS4962 Application overview
Doc ID 10968 Rev 8 5/44
2 Application overview
Table 4. External component information
Table 5. Pin description
Application overview TS4962
6/44 Doc ID 10968 Rev 8
Figure 1. Typical application schematics
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 7/44
3 Electrical characteristics
Table 6. Electrical characteristics at VCC = +5V,
with GND = 0 V, Vicm = 2.5 V, and Tamb = 25°C (unless otherwise specified)
Electrical characteristics TS4962
8/44 Doc ID 10968 Rev 8 Standby mode is active when VSTBY is tied to GND. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinusoidal signal to
VCC at f = 217Hz.
Table 6. Electrical characteristics at VCC = +5V,
with GND = 0 V, Vicm = 2.5 V, and Tamb = 25°C (unless otherwise specified)
(continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 9/44
Table 7. Electrical characteristics at VCC = +4.2 V with GND = 0 V, Vicm = 2.1 V and
Tamb = 25°C (unless otherwise specified)(1)
Electrical characteristics TS4962
10/44 Doc ID 10968 Rev 8 All electrical values are guaranteed with correlation measurements at 2.5 V and 5V. Standby mode is active when VSTBY is tied to GND. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinusoidal signal to
VCC at f = 217Hz.
Table 7. Electrical characteristics at VCC = +4.2 V with GND = 0 V, Vicm = 2.1 V and
Tamb = 25°C (unless otherwise specified)(1) (continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 11/44
Table 8. Electrical characteristics at VCC = +3.6V
with GND = 0 V, Vicm = 1.8 V, Tamb = 25°C (unless otherwise specified)(1)
Electrical characteristics TS4962
12/44 Doc ID 10968 Rev 8 All electrical values are guaranteed with correlation measurements at 2.5 V and 5V. Standby mode is activated when VSTBY is tied to GND. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinusoidal signal to
VCC at f = 217Hz.
Table 8. Electrical characteristics at VCC = +3.6V
with GND = 0 V, Vicm = 1.8 V, Tamb = 25°C (unless otherwise specified)(1)
(continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 13/44
Table 9. Electrical characteristics at VCC = +3.0V
with GND = 0 V, Vicm = 1.5 V, Tamb = 25°C (unless otherwise specified)(1)
Electrical characteristics TS4962
14/44 Doc ID 10968 Rev 8 All electrical values are guaranteed with correlation measurements at 2.5 V and 5V. Standby mode is active when VSTBY is tied to GND. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinusoidal signal to
VCC at f = 217Hz.
Table 9. Electrical characteristics at VCC = +3.0V
with GND = 0 V, Vicm = 1.5 V, Tamb = 25°C (unless otherwise specified)(1)
(continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 15/44
Table 10. Electrical characteristics at VCC = +2.5V
with GND = 0 V, Vicm = 1.25V, Tamb = 25°C (unless otherwise specified)
Electrical characteristics TS4962
16/44 Doc ID 10968 Rev 8 Standby mode is active when VSTBY is tied to GND. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinusoidal signal to
VCC at f = 217Hz.
Table 10. Electrical characteristics at VCC = +2.5V
with GND = 0 V, Vicm = 1.25V, Tamb = 25°C (unless otherwise specified)
(continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 17/44
Table 11. Electrical characteristics at VCC +2.4V
with GND = 0 V, Vicm = 1.2 V, Tamb = 25°C (unless otherwise specified)
Electrical characteristics TS4962
18/44 Doc ID 10968 Rev 8 Standby mode is active when VSTBY is tied to GND.
Table 11. Electrical characteristics at VCC +2.4V
with GND = 0 V, Vicm = 1.2 V, Tamb = 25°C (unless otherwise specified)
(continued)
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 19/44
3.1 Electrical characteristics curves
The graphs shown in this section use the following abbreviations. RL + 15 μH or 30 μH = pure resistor + very low series resistance inductor Filter = LC output filter (1µF+30 µH for 4 Ω and 0. 5µF + 60 µH for 8 Ω)
All measurements are done with CS1 = 1 µF and CS2 = 100 nF (see Figure 2), except for the
PSRR where CS1 is removed (see Figure3).
Figure 2. Schematic used for test measurements
Figure 3. Schematic used for PSSR measurements
Electrical characteristics TS4962
20/44 Doc ID 10968 Rev 8
Figure 4. Current consumption vs. power
supply voltage
Figure 5. Current consumption vs. standby
voltage
Figure 6. Current consumption vs. standby
voltage
Figure 7. Output offset voltage vs. common
mode input voltage
Figure 8. Efficiency vs. output power Figure 9. Efficiency vs. output power
TS4962 Electrical characteristics
Doc ID 10968 Rev 8 21/44
Figure 10. Efficiency vs. output power Figure 11. Efficiency vs. output power
Figure 12. Output power vs. power supply
voltage
Figure 13. Output power vs. power supply
voltage
Figure 14. PSRR vs. frequency Figure 15. PSRR vs. frequency
Electrical characteristics TS4962
22/44 Doc ID 10968 Rev 8
Figure 16. PSRR vs. frequency Figure 17. PSRR vs. frequency
Figure 18. PSRR vs. frequency Figure 19. PSRR vs. frequency
Figure 20. PSRR vs. common mode input voltage Figure 21. CMRR vs. frequency
