Those single-cell lithium battery can only output ± 7.5V, can only output 3W, the maximum output of only 200mA, suspended ground, positive and negative error several volts not afraid to burn the headset Oh Oh version.

But also for the need for dual power supply op amps and other circuits to worry about it?

High-performance amp double power supply need 220V transformer how to do?

Dual power converters are not common, the signal to the suspension? What can I do with a power source with a pre / input signal?

This module successfully resolved! Only spend a sealed transformer money.

The circuit uses imported master IC, plus the international well-known manufacturers to create excellent components:

COOPER precision transformer; the United States million generation ultra-low resistance NMOS;

Small Japanese Toshiba ultra low pressure drop Schottky diode;

Small Japanese chemical high-frequency electrolytic capacitors, high-frequency switching circuit also used ordinary electrolytic capacitors I Oh;

AVX brand X5R level multi-layer ceramic capacitors, the efficiency easily beyond 80%.

Wide input voltage range, 2.5V to 25V input can be, and the output voltage unchanged, wide range of work, automatic buck.

Output current, input 19V voltage can easily output ± 12V 1000mA!

Output power supply high precision, the output positive and negative power supply deviation of up to 0.1V!

the most important is! The module input negative output corresponding to 0V! That is, the same is true

Perfect solution to floats and other issues, no need to arrange a small signal floating!

Performance:

Size (length × width × height): 49.5mm × 31mm × 15mm (including capacitance height, manual measurement error)

Input range: 2.5 ~ 25V (less than 2.5V can not start, higher than 25V capacitor explosion)

Output voltage: plus or minus 12V (delivery default to 12.5V or so, need other voltage please contact)

Maximum output current: the use of OUT + and OUT-, that is, when using +12 V and -12V, the maximum up to 1000mA, or 24W;

When using OUT + and GND, the maximum output current up to 2.2A, ie 26W, when using +12 V and GND

50 yuan level sealed transformer output power also 9.6W, the use of this circuit can be the general low-power pre-level or amp power supply!

Application examples:

1. NE5532 pre-amplification, pre-tuning and other dual power supply amplifier circuit.

2. Motor for the fever system before the power supply circuit.

3. Automatic step-up and down circuit, solar voltage conversion and so on.

...

Precautions:

1. Board input and output is not reverse protection, power before, please confirm the voltage positive and negative, otherwise it may lead to damage.

2. Output without short circuit protection, short circuit current up to 5A, and then burn the transformer.

3. Because the feedback is connected to the positive supply side, the use of a negative power supply requires a positive power supply with a slight load, otherwise the negative supply output current will be abnormal.

4. Also because of the relationship between the feedback network, no-load when the positive and negative power supply error will be about 0.5V, is a normal phenomenon, after the load error will be less than 0.1V.

5. The lower the input voltage, the smaller the maximum current that can be output, and the lower the efficiency.

6. When using OUT + and GND alone, there is no load left between GND and OUT-. The no-load voltage can reach 19V (plus or minus 12)! Please note! The The

7. On the application of audio amplifier circuit noise problem, because this module is switching power supply, easy to cause interference to the load, this time can increase the LC filter, EMI filter, the appropriate to reduce the negative feedback circuit resistor, chassis signal line To shield the line to reduce high-frequency interference.

Package Included:

1PCS Single power supply to dual power supply ± 12V 1A power supply module NEW