: Although the unit is IP69K rated, ensure the cable is routed away from sharp edges or high-heat sources.
Once the charger passes the dim‑bulb test, connect a known‑good DEWALT battery and observe the LEDs: pbm27a-210-mv--r diagram
| Parameter | Value | |-----------|-------| | Nominal resistance (25°C) | 210 Ω ± 0.1% | | Power rating | 3 W @ 70°C | | Maximum voltage | 350 VDC / 250 VAC RMS | | TCR | ±5 ppm/°C (typical) | | Thermal resistance (R(_thJA)) | 42°C/W | | Operating temperature | -55°C to +155°C | : Although the unit is IP69K rated, ensure
[ AC Mains Input ] ---> [ Rectifier & Filter ] ---> [ UC3845B PWM Controller ] | (Flyback Transformer) | [ Battery Interface ] <-- [ Microcontroller / LEDs ] <-- [ Rectifier / Smoothing ] 1. The Primary Stage (High-Voltage Input) pbm27a-210-mv--r diagram