TDA7570 STMicroelectronics, TDA7570 Datasheet
TDA7570
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TDA7570 Summary of contents
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... Chip thermal protection ■ External temperature sensor possibility ■ Thermal warning pins ■ Adjustable clip detector pin Description The TDA7570 is a switchmode power audio amplifier with differential inputs and PWM output. Table 1. Device summary Order code TDA7570 August 2007 HiQUAD64 The maximum output current and voltage swing ...
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... Functions, pins and components description . . . . . . . . . . . . . . . . . . . 12 4.1 Components with critical placement and type 4.2 Input capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.3 Short circuit protection current calculation . . . . . . . . . . . . . . . . . . . . . . . . 12 4.4 External thermal protection network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.5 Gate driving network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.6 External connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Package informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 Main characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TDA7570 Figure ...
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... TDA7570 1 Block and simplified application diagram Figure 1. Block and simplified application diagram FEED DIG I-OFCLK 34 OSC O0-15 29 CDsel1 30 CDsel2 CLIP 31 CD NTC 38 5V DIG 36 THWint TERM. 37 THWext 2.5V 54 -2.5V 52 REF 55 MUTE 56 ST- PGND DGND SGND - REF1 CHANNEL LEFT HSD + LEFT PROTECTIONS ...
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... Function Not connected Not connected Not connected Gate PMOS, right channel Sense gate PMOS, right channel Sensing 2 PMOS, right channel Sensing 1 PMOS, right channel Supply drivers PMOS Power ground Not connected TDA7570 -2. N. N.C. 43 N.C. 42 +Vs-low 41 N.C. 40 5Vdig 39 N ...
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... TDA7570 Table 2. Pins description (continued) Pin Name number 12 +Vs 13 Spl1 14 Spl2 15 -Vs+5 16 N.C. 17 Gpls 18 Gpl 19 N.C. 20 N.C. 21 Gnl 22 Gnls 23 Snl2 24 Snl1 25 -Vs+Vrefl 26 -Vs 27 -Vs 28 Feed CDsel1 30 CD sel2 dgnd 33 I-O-FCLK 34 O0-I5 35 N.C. 36 THWint 37 THWext 38 NTC 39 N.C. 40 5Vdig 41 42 +Vs-low 43 N.C. 44 N.C. ...
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... Feedback network right channel Negative voltage supply Negative voltage supply Supply drivers NMOS. Right channel Sensing 2 NMOS, right channel Sensing 1 NMOS, right channel Sense gate NMOS, right channel Gate NMOS, right channel TDA7570 Voltage limit Voltage limit (low) (high) -3V 3V -3V 3V ...
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... S I Quiescent supply current q I Quiescent supply current st-by V Output offset voltage os P Output Power o Power dissipation of the P d TDA7570 Parameter = 85°C case Parameter = 25°C, Gain = 28dB, application circuit shown in j Test condition 352.8kHz st-by switching from +V S from +V -low ...
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... TBD order, 20kHz butterworth Single-ended Bridge f = 1kHz 2Vrms 2Vrms 100Hz 0. on, 1mA CDsel1=0, CDsel2=0 (near clipping detection) CDsel1=0, CDsel2=1 CDsel1=1, CDsel2=0 CDsel1=1, CDsel2=1 TDA7570 Min. Typ. Max. Unit 10 W 0.1 % 0.03 0 μV 200 μ ...
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... TDA7570 Table 5. Electrical characteristics (continued ±25V 4Ω 100Hz Figure 3, 2x65/1x130W system, unless otherwise specified.) Symbol Parameter PROTECTIONS T Chip thermal warning intervention hwc T Thermal shut-down chip sdc T Thermal shut-down chip hysteresis sdch External thermal warning T hws intervention External thermal shut-down T sds intervention ...
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... Electrical specifications Figure 3. Application diagrams 10/17 TDA7570 ...
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... TDA7570 3.4 Notes on the electrical schematic shown in 3.4.1 Main characteristics ● 2 channels single-ended or 1 channel bridge PWM amplifier ● Power output: see ● Gain single-ended = 28 dB ● Gain bridge = 34dB ● Clip detector settled at THD=10% ● Internal master oscillator The schematic is depicted showing the suggested structure of the printed circuit board tracks (star points, high current path, components placement) ...
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... Vfil = Ispx1 x Rfil = 20mV Typ 12/ 3dB = --------------------------------------------- - ⋅ 6.28 10000 C Cfil (typ 2.2nF) Rp2 ⋅ ( ⎛ 1 ----------------- - Vpx Rp1 I = ------------------------------------------------- - ⎝ lim Rsens Rp2 ← if Rp2 is not used ----------------- - Vpx I Vfil = + lim Rsens ⋅ in TDA7570 SPx2 pin Vp=100mV Typ comparator SPx1 pin ) ⎞ Rp2 + + Vfil ⎠ TDA7570 ...
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... TDA7570 4.4 External thermal protection network Example of external thermal protection circuitry ● Components: – type: B57621 C621/100k/+ – 10K text ● Results (simulations): – External thermal warning temperature intervention: 90 °C – External thermal shut down temperature intervention: 100 °C – External thermal shut down hysteresis: 6 °C 4 ...
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... NL+, INL-, INR+, INR- Input pins. The sign is referred to the input of the differential-to- singleended amplifier. Because the power stage is an inverting stage, the output of the amplifier is with opposite sign with respect these pins. For bridge operation, the connection INL+ must be shorted to the INR- and the connection INL- must be shorted to INR+ 14/17 TDA7570 ...
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... TDA7570 5 Package informations In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... Revision history 6 Revision history Table 7. Document revision history Date 29-Aug-2007 16/17 Revision 1 Initial release. TDA7570 Changes ...
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... TDA7570 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...