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Dual tda7265 and CSR7645 Based 100watt BT amplifier

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ANSHUMANDOCX/TDA7265-100watt-BT-Amplifier

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3a14444 · · Aug 1, 2025

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TDA7265 100 watt DUAL IC BT Amplifier

This is a BT amp which has a max ouput of 100watt (50+50) and BT input for audio

Parts

  • TDA7265 IC x2
  • MH-M18
  • 12-0-12 Transformer

Plan

I always wanted to make a powerful enough speakers to use with my Sony speaker. Now i have found a appropriate ic which can be tweaked to to get a max output of 50 watt in each channel hence 100watt total TDP.

I have use a MH-M18 BT module which is both cheap and provides lossless audio

i had made a TDA7269A amp which was a 14+14 watt Amp so this is a massive upgrade to it.

image image image

BOM

S.No Description Quantity Total Price Supplier LINK
1 Capacitors $3.64 LCSC https://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_AISHI-ERR1VM102G20OT_C398835.html https://lcsc.com/product-detail/image/50YXF1MEFC5X11_C2927584.html https://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50YXF1MEFC5X11_C2927584.html https://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50YXF10MEFC5X11_C88726.htmldc https://lcsc.com/product-detail/Film-Capacitors_KYET-PE104J2A0501_C390170.html https://lcsc.com/product-detail/Film-Capacitors_WEIDY-W242A562JD2TAAA4JA_C7502419.html
2 Resistor 5 $3.03 LCSC https://lcsc.com/product-detail/Through-Hole-Resistors_VO-MF1-4W-36K-1-ST52_C2848587.html https://lcsc.com/product-detail/Through-Hole-Resistors_YAGEO-MFR-25FBF52-560R_C1369978.html https://lcsc.com/product-detail/Through-Hole-Resistors_CCO-Chian-Chia-Elec-CF1-4W-4-7-5-T_C119999.html https://lcsc.com/product-detail/Through-Hole-Resistors_Huaxing-Mechanical-Elec-MF1-4W-1K-1-T52_C713997.html https://lcsc.com/product-detail/Through-Hole-Resistors_VO-MF1-4W-10K-1-ST52_C2903232.html
3 Diode 5 $0.81 LCSC https://lcsc.com/product-detail/Diodes-General-Purpose_LGE-6A4_C5369359.html
4 Regulator ICs 5 $2.77 LCSC https://lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_ST-L7912CV-DG_C3797.html https://lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_ST-L7812CV-DG_C2914.html https://lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_ST-L7805CV-DG_C3795.html
5 TDA7265 2 $3 LCSC https://lcsc.com/product-detail/E-ink-Display_SEEKINK-E037A49_C41416467.html?s_z=n_C41416467
6 Terminal Blocks $2.32 LCSC https://lcsc.com/product-detail/Screw-Terminal-Blocks_JILN-JL500-50802G01_C709041.html https://lcsc.com/product-detail/Screw-Terminal-Blocks_Ningbo-Kangnex-Elec-WJ500V-5-08-3P_C72334.html
TRANSFORMER+BT MODLUE+WIRE $18 Maker Bazaar https://makerbazar.in/products/multi-coloured-ribbon-cable-wire?variant=40914910281879 https://makerbazar.in/products/wireless-bluetooth-audio-receiver-module?variant=46233436946672 https://makerbazar.in/products/24volt-dc-switch-mode-power-supply-smps-rectangular-metal-casing?variant=47589077188848
SHIPPING LCSC 3.75 LCSC
PCB+ Shipping 12 JLCPCB
TOTAL 48.42

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