The old blue-tooth sound, which is mostly powered by a dc roundhole, must be equipped with a special charger, the interface is loose and of poor utility, the replacement of the main type-c interface is not feasible, and the protocol handshake must be done by pd to extract the chip. Ldr6500u is a high-value formula for adaptation to such modifications, and the core and chip functions are described in very brief lengths。
I. Core issue of the dc interface sound modification of type-c
The normal type-c charger defaults that only 5vs will be exported and cc-led to complete the pd fast-charge protocol negotiations will be required to export the 5v/9v/12v rated voltage required for sound, replacing the type-c mother alone, either with insufficient power supply, or with a failure to turn on the power charge, or with a failure to match the burning equipment, with a dedicated pd sink chip。
Ii. Ldr6500u pd core function for electrocution chips
Ldr6500u, a non-programmed pd chip designed for small electrical, digital equipment, adapted to dc-to-type-c modifications, has a bright core:
Iii. Extremely simple retrofitting steps (new hands-on) to break open the old doors: cutting off the shell, removing the original dc power-supply master, cleaning the circuit board welding, and retaining the original power supply input line. (a) the typ-c mother: the selection standard 8pin type-c is fixed to the original dc openings, welding vbus, gnd, cc1/cc2 and ensuring welding is free. Welded chips: ldr6500 u is attached to the spare parts of the circuit board, defined by the extraction of the line: type-c vbus to the chip vbus, cc to the straight line, chip vout to the sound end, co-location with small filtering capacity. Test recovery: start with a low pressure charger test, start with normal heat, then reload the shell and complete the modification。
Iv. Caution
Rehabilitating core pits: first checking the acoustic rated voltage, strictly matching the chip output slots, strictly prohibiting high-pressure adjustment with low-pressure equipment; shorting of the cc-led foot-wire to avoid failure of the protocol handshake; welding temperature and static protection。
Summary
Designing the dc bluetooth sound with ldr6500u, without major wiring or programming, will allow the interface upgrade to be completed in a few minutes, with the exception of the dedicated dc charger, universalization of all type-c chargers, low-cost, practical and suitable for other dc power supply units such as lamps and small fans。
