Hw 131 Power Supply Datasheet New! -

Hw 131 gets very hot, then voltage drops. Solution: Reduce load or lower input voltage. Use 7.5V instead of 12V. Attach small heatsink (12x12mm) to top of black ICs.

| Parameter | Symbol | Min | Max | Unit | |-----------|--------|-----|-----|------| | DC input voltage (barrel jack) | VIN_DC | 0 | 15 | V | | USB input voltage | VUSB | 4.75 | 5.25 | V | | Output current (5V) | Iout_5V | 0 | 800 | mA | | Output current (3.3V) | Iout_3V3 | 0 | 600 | mA | | Operating temperature | Top | -25 | +85 | °C | | Storage temperature | Tstg | -40 | +125 | °C | Hw 131 Power Supply Datasheet

Ripple >100mV shown on oscilloscope. Solution: Add a 100µF electrolytic capacitor and 0.1µF ceramic cap on the breadboard power rails. Place load close to module. Hw 131 gets very hot, then voltage drops

Typically includes the Hw 131 board, a 2-pin jumper for mode selection, and sometimes a USB-to-barrel cable. Attach small heatsink (12x12mm) to top of black ICs

To get a stable 5V output, input must be at least 6.2V. For 3.3V output, input must be ≥4.4V. When using USB (5V input), the 5V output is simply passthrough (no regulation) – the 3.3V rail still works.

"HW-131" is a generic Chinese OEM model. If you need the official full datasheet (PDF) with pinouts, derating curves, and safety diagrams, please reply with: