8682l Ic Datasheet -
The most critical design parameter for the 8682L is the programming resistor connected between PROG (pin 6) and GND. The formula is:
[ I_CHG = \fracV_PROG \times 1000R_PROG ]
Where ( V_PROG ) is typically 1.0V during constant-current charging.
Thus:
Important: The 8682L does not support currents above 800mA reliably in SOT-23-6 package due to thermal limitations. For higher currents, choose a different IC.
(Exact pin names vary by manufacturer; refer to the datasheet for the specific 8682L part.)
If you want, I can:
Related search suggestions provided.
Even with a correct circuit, problems arise. Here’s a diagnostic table:
| Symptom | Likely Cause | Solution | |--------------------------------------|-----------------------------------------------|----------------------------------------------| | Charging current too low | Rprog too high, or thermal foldback active | Reduce Rprog; improve cooling | | Charging never completes (red LED stays on) | Battery voltage won't reach 4.2V (old cell) or CV loop unstable | Replace battery; add 1µF at BAT pin | | Both LEDs off with VCC present | VCC < 4.3V or IC damaged | Check USB cable; replace IC | | IC gets extremely hot at 100mA | VCC > 6.5V or BAT shorted to GND | Reduce input voltage; check soldering | | Green and red LEDs both on | Fault condition (likely overvoltage or overtemperature) | Cycle power; measure VCC and battery voltage| | Battery drains when USB unplugged | Reverse leakage through VCC pin (rare) or external path | Add Schottky (BAT -> VOUT for load) | 8682l ic datasheet
While you should always verify the exact datasheet for your specific batch, the standard specifications for this IC family typically include:
A typical application from the datasheet requires minimal external components:
Stability note: Unlike some modern LDOs, the 8682L requires output capacitors with controlled ESR. Ultra-low ESR ceramic caps alone may cause oscillations; adding a 0.5Ω resistor in series is a common fix. The most critical design parameter for the 8682L
