TS4962M ST Microelectronics, Inc., TS4962M Datasheet

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TS4962M

Manufacturer Part Number
TS4962M
Description
Manufacturer
ST Microelectronics, Inc.
Datasheet

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Description
The TS4962M is a differential Class-D BTL power
amplifier. It is able to drive up to 2.3W into a 4Ω
load and 1.4W into a 8Ω load at 5V. It achieves
outstanding efficiency (88%typ.) compared to
classical Class-AB 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 5ms. A
standby function (active low) allows the reduction
of current consumption to 10nA typ.
Order Codes
December 2005
TS4962MEIJT
Operating from V
Standby mode active low
Output power: 3W into 4Ω and 1.75W into 8Ω
with 10% THD+N max and 5V power supply.
Output power: 2.3W @5V or 0.75W @ 3.0V
into 4Ω with 1% THD+N max.
Output power: 1.4W @5V or 0.45W @ 3.0V
into 8Ω with 1% THD+N max.
Adjustable gain via external resistors
Low current consumption 2mA @ 3V
Efficiency: 88% typ.
Signal to noise ratio: 85dB typ.
PSRR: 63dB typ. @217Hz with 6dB gain
PWM base frequency: 250kHz
Low pop & click noise
Thermal shutdown protection
Available in flip-chip 9 x 300µm (Pb-free)
Part Number
CC
Temperature Range
= 2.4V to 5.5V
-40, +85°C
3W Filter-free Class D Audio Power Amplifier
Lead-Free Flip-Chip
Package
Applications
Cellular Phone
PDA
Notebook PC
C2
C1
A1
IN+: positive differential input
IN-: negative differential input
VDD: analog power supply
GND: power supply ground
STBY: standby pin (active low)
OUT+: positive differential output
OUT-: negative differential output
Stdby
In-
In+
4/B1
4/B1
1/A1
1/A1
V
V
7/C1
7/C1
Pin connections
IN
IN
IN
IN
+
-
Block diagram
DD
DD
+
+
-
-
150k
150k
Tape & Reel
Oscillator
Internal
Packing
Bias
GND
GND
STBY
STBY
2/A2
2/A2
V
V
5/B2
5/B2
8/C2
8/C2
PWM
DD
DD
B1
A2
TS4962M
Output
Bridge
OUT
OUT
Vcc
GND
GND
GND
OUT
OUT
H
3/A3
3/A3
6/B3
6/B3
9/C3
9/C3
Out+
Out-
-
-
+
+
B2
B3
Marking
C3
A3
62
www.st.com
Rev 3
1/32
32

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TS4962M Summary of contents

Page 1

... Thermal shutdown protection ■ Available in flip-chip 9 x 300µm (Pb-free) Description The TS4962M is a differential Class-D BTL power amplifier able to drive up to 2.3W into a 4Ω load and 1.4W into a 8Ω load at 5V. It achieves outstanding efficiency (88%typ.) compared to classical Class-AB audio amps. ...

Page 2

... Internally Limited 2 200 200 GND 260 , and between CC Value 2.4 to 5.5 0 0.8 CC 1.4 ≤ V ≤ V STBY CC (4) GND ≤ V ≤ 0.4 STB ≥ ≤ 70°C. amb / GND. TS4962M Unit V V °C °C °C °C °C Unit Ω °C/W ...

Page 3

... GND Application Component Information Functional Description Bypass supply capacitor. To install as close as possible to the TS4962M to minimize high-frequency ripple. A 100nF ceramic capacitor should be added to enhance the power supply filtering at high frequency. Input resistor to program the TS4962M differential gain (Gain with R in kΩ ...

Page 4

... Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L is tied to GND. )/rms(V )). V is the superimposed sinusoidal signal to V out ripple ripple TS4962M Min. Typ. Max. Unit 2.3 3 1000 2 1.4 1. ...

Page 5

... TS4962M Table +4.2V, GND = 0V Symbol Parameter I Supply Current CC (2) I Standby Current STBY V Output Offset Voltage No input signal Output Power out Total Harmonic THD + N Distortion + Noise Efficiency Efficiency Power Supply PSRR Rejection Ratio with (3) Inputs Grounded Common Mode CMRR Rejection Ratio ...

Page 6

... L Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L is tied to GND. )/rms(V )). V is the superimposed sinusoidal signal to V out ripple ripple TS4962M (1) Min. Typ. Max. Unit 2 2 1000 1.15 W 1.51 0.7 0 ...

Page 7

... TS4962M Table +5V, GND = 0V Symbol Parameter I Supply Current CC (2) I Standby Current STBY V Output Offset Voltage No input signal Output Power out Total Harmonic THD + N Distortion + Noise Efficiency Efficiency Power Supply PSRR Rejection Ratio with (3) Inputs Grounded Common Mode CMRR Rejection Ratio ...

Page 8

... L Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L Unweighted R = 4Ω + Filter L A weighted R = 4Ω + Filter L is tied to GND. )/rms(V )). V is the superimposed sinusoidal signal to V out ripple ripple TS4962M Min. Typ. Max. Unit 1.7 2 1000 0.52 W 0.71 0.33 0. ...

Page 9

... TS4962M Table +2.4V, GND = 0V Symbol Parameter I Supply Current CC (1) I Standby Current STBY V Output Offset Voltage No input signal Output Power out Total Harmonic THD + N Distortion + Noise Efficiency Efficiency Common Mode CMRR Rejection Ratio Gain Gain Value Internal Resistance R STBY from Standby to GND ...

Page 10

... GND Rin Out+ In+ 15uH or 30uH 150k TS4962 Rin In- Out- 150k GND 5th order RMS Selective Measurement Reference 50kHz low pass Bandwidth=1% of Fmeas filter Ohms 5th order or 50kHz low pass RL filter Ohms 5th order or 50kHz low pass RL filter LC Filter TS4962M ...

Page 11

... TS4962M Figure 4. Current consumption vs. power supply voltage 2.5 No load Tamb=25 ° C 2.0 1.5 1.0 0.5 0 Power Supply Voltage (V) Figure 6. Current consumption vs. standby voltage 2.0 1.5 1.0 0.5 0.0 0.0 0.5 1.0 1.5 Standby Voltage (V) Figure 8. Efficiency vs. output power 100 Efficiency Power Dissipation 20 0 0.0 0.5 1.0 Output Power (W) Figure 5. 2.5 2.0 1.5 1.0 0.5 0 Figure 7. Vcc = 3V No load Tamb=25 ° ...

Page 12

... Tamb = 25 ° C -40 -50 -60 -70 -80 10000 20k 20 Efficiency Power Vcc=3V Dissipation RL=8 Ω + ≥ 15 µ H F=1kHz THD+N ≤ 1% 0.1 0.2 0.3 0.4 Output Power ( Ω + ≥ 15 µ 1kHz BW < 30kHz Tamb = 25 ° C THD+N=10% THD+N=1% 2.5 3.0 3.5 4.0 4.5 5.0 Vcc (V) Vcc=5V, 3.6V, 2.5V 100 1000 Frequency (Hz) TS4962M 0.5 5.5 10000 20k ...

Page 13

... TS4962M Figure 16. PSRR vs. frequency 0 Vripple = 200mVpp -10 Inputs = Grounded G = 6dB, Cin = 4.7 µ Ω + Filter ∆ R/R ≤ 0.1% -30 Tamb = 25 ° C -40 Vcc=5V, 3.6V, 2.5V -50 -60 -70 -80 20 100 1000 Frequency (Hz) Figure 18. PSRR vs. frequency 0 Vripple = 200mVpp -10 Inputs = Grounded G = 6dB, Cin = 4.7 µ Ω µ H ∆ R/R ≤ 0.1% -30 Tamb = 25 ° ...

Page 14

... Figure 27. CMRR vs. common mode input voltage -20 ∆ Vicm = 200mVpp F = 217Hz - 6dB RL ≥ 4 Ω + ≥ 15 µ H Tamb = 25 ° C -40 -50 -60 -70 10000 20k 0.0 0.5 1.0 Common Mode Input Voltage (V) TS4962M Vcc=5V, 3.6V, 2.5V 1000 10000 20k Frequency (Hz) Vcc=5V, 3.6V, 2.5V 1000 10000 20k Frequency (Hz) Vcc=2.5V Vcc=3.6V Vcc=5V 1.5 2.0 2.5 3.0 3.5 4 ...

Page 15

... TS4962M Figure 28. THD+N vs. output power Ω µ 100Hz Vcc=3. 6dB BW < 30kHz Vcc=2.5V Tamb = 25 ° 0.1 1E-3 0.01 0.1 Output Power (W) Figure 30. THD+N vs. output power Ω µ 100Hz G = 6dB Vcc=3.6V BW < 30kHz Tamb = 25 ° C Vcc=2.5V 1 0.1 1E-3 0.01 Output Power (W) Figure 32. THD+N vs. output power Ω ...

Page 16

... BW < 30kHz Vcc=3.6V Tamb = 25 ° C Vcc=2.5V 0.01 0.1 Output Power (W) RL=4 Ω µ Filter G=6dB Bw < 30kHz Vcc=5V Po=1.5W Tamb = 25 ° C Po=0.75W 50 100 1000 Frequency (Hz) RL=4 Ω µ Filter G=6dB Bw < 30kHz Vcc=3.6V Po=0.9W Tamb = 25 ° C Po=0.45W 100 1000 Frequency (Hz) TS4962M 1 2 10000 20k 10000 20k ...

Page 17

... TS4962M Figure 40. THD+N vs. frequency 10 RL=4 Ω µ H G=6dB Bw < 30kHz Po=0.4W Vcc=2.5V Tamb = 25 ° 0.1 200 1000 Frequency (Hz) Figure 42. THD+N vs. frequency 10 RL=8 Ω µ H G=6dB Bw < 30kHz Vcc=5V Tamb = 25 ° C Po=0.9W 1 0.1 Po=0.45W 50 100 1000 Frequency (Hz) Figure 44. THD+N vs. frequency 10 RL=8 Ω µ H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25 ° ...

Page 18

... G=6dB 2 Vin=500mVpp Cin=1 µ F Tamb = 25 ° 100 10000 20k Figure 51. Gain vs. frequency 8 6 Vcc=5V, 3.6V, 2.5V 4 RL=8 Ω µ H G=6dB 2 Vin=500mVpp Cin=1 µ F Tamb = 25 ° 100 10000 20k TS4962M Po=0.2W Po=0.1W 1000 10000 20k Frequency (Hz) 1000 10000 20k Frequency (Hz) 1000 10000 20k Frequency (Hz) ...

Page 19

... TS4962M Figure 52. Gain vs. frequency 8 6 Vcc=5V, 3.6V, 2.5V 4 RL=8 Ω µ H G=6dB 2 Vin=500mVpp Cin=1 µ F Tamb = 25 ° 100 1000 Frequency (Hz) Figure 54. Gain vs. frequency 8 6 Vcc=5V, 3.6V, 2.5V 4 RL=No Load G=6dB 2 Vin=500mVpp Cin=1 µ F Tamb = 25 ° 100 1000 Frequency (Hz) Figure 56. Startup & shutdown time 6dB, C ...

Page 20

... Figure 58. Startup & shutdown time 6dB Vo1 Vo2 Standby Vo1-Vo2 Figure 60. Startup & shutdown time 6dB Vo1 Vo2 Standby Vo1-Vo2 20/32 Figure 59. Startup & shutdown time = 100nF (5ms/div) in Vo1 Vo2 Standby (5ms/div) in TS4962M 6dB (5ms/div Vo1-Vo2 ...

Page 21

... Application Information 5.1 Differential configuration principle The TS4962M is a monolithic fully-differential input/output class D power amplifier. The TS4962M also includes a common-mode feedback loop that controls the output bias value to average for any DC common mode input voltage. This allows the device to always CC have a maximum output voltage swing, and by consequence, maximize the output power ...

Page 22

... CL 2π ------------------------------------- - = × × in 2π Hz. Table 2: Operating conditions on page (V) 0.8V icm × × × 163.5kΩ × 163.5kΩ typically and this is lower than icm (Hz (F) TS4962M 2), value, we icm in these forms, in ...

Page 23

... AMR value (6V). 5.6 Wake-up Time: t When the standby is released to set the device ON, there is a wait of about 5ms. The TS4962M has an internal digital delay that mutes the outputs and releases them after this time in order to avoid any pop noise. ...

Page 24

... Application Information 5.9 Single ended input configuration It's possible to use the TS4962M in a single-ended input configuration. However, input coupling capacitors are needed in this configuration. The following schematic shows a single ended input typical application. Ve GND All formulas are identical except for the gain with R ...

Page 25

... Uses ground plane for “shielding” sensitive wire. ● Place, as close as possible to the TS4962M and in series with each output, a ferrite bead with a rated current at minimum 2A and impedance greater than 50Ω at frequencies >30MHz. If, after testing, these ferrite beads are not necessary, replace them by a short- circuit. Murata BLM18EG221SN1 or BLM18EG121SN1 are possible examples. ● ...

Page 26

... IC1 2 IC2 × × × 300 ------------------------ and V = ------------------------ Vcc Vcc GND Out+ C3 Output H Bridge SPEAKER A3 Out- GND TS4962 A2 B3 GND 1 2 × ≤ V – 0. TS4962M ...

Page 27

... TS4962M Example 2: One differential input plus one single ended input With (R in kΩ): i Standby Stdby C2 Internal R2 Bias E2+ 150k E1+ In- PWM In 150k R1 GND C1 Oscillator + - Out – Out 300 A = ------------------------------ - = --------- - Out Out 300 – ------------------------------ - = --------- - – ------------------------------------ ...

Page 28

... Demoboard 6 Demoboard A demoboard for the TS4962M is available with a the flip-chip adapter flip-chip to DIP. For more information about this demoboard, please refer to Application Note AN2134. Figure 61. Schematic diagram of mono class D demoboard for TS4962M Cn1 + J1 Cn3 Positive Input Negative input Figure 62. Diagram for flip-chip-to-DIP adapter ...

Page 29

... TS4962M Figure 63. Top view Figure 64. Bottom layer Figure 65. Top layer Demoboard 29/32 ...

Page 30

... Pad in Cu 18µm with Flash NiAu (2-6µm, 0.2µm max.) Pad in Cu 18µm with Flash NiAu (2-6µm, 0.2µm max.) TS4962M 75µm min. 75µm min. 500µm 500µm 100µm max. ...

Page 31

... TS4962M 8 Package Mechanical Data 9-bump flip-chip Figure 67. Pin-out for 9-bump flip-chip (top view) Figure 68. Marking for 9-bump flip-chip (top view) XXX XXX YWW YWW Figure 69. Mechanical data for 9-bump flip-chip 1.60 mm 1.60 mm 0.5mm 0.5mm 0.5mm 0.5mm GND GND IN IN OUT OUT + + - ...

Page 32

... Table data updated for Output Voltage Noise condition see 2 Table 5., Table 6., Table 7., Table 8. andTable 9. – Formatting changes throughout. 3 Product in full production. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com TS4962M Changes Table 4., ...

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