HW-357 TP4056 Lithium Battery Charging Module with Stepup Boost HW-357

Key Features:

• TP4056 linear charger: CC/CV charging at up to 1 A
• Adjustable boost converter: steps battery voltage up continuously (approx. 4.3 V to 27 V)
• Charging cut‑off voltage: 4.2 V ±1%
• Charging current: up to 1 A (default set with Rprog ≈1.2 kΩ)
• Output voltage dependent current: e.g. ~1.4 A at 5 V, ~0.8 A at 9 V, ~0.6 A at 12 V
• Supports simultaneous charging and boosted output (power sharing)
• LEDs for charging and full‑charge indication
• Compact PCB: approx. 33 mm × 24 mm × 9 mm; weight ~11 g

Electrical Specifications:

• Input voltage: DC 4.5 V–8 V (USB 5 V or solar panel)
• Battery type: Single‑cell Li‑ion / Li‑Po (3.7–4.2 V)
• Charge mode: Trick‑charge until ~3 V at ~130 mA, then constant‑current, then constant‑voltage until charge terminates at ~0.1 A
• Boost converter output: Adjustable 4.3–27 V (CW trim up), max ~1 A output current
• Battery discharge support: up to ~2 A (load via OUT)
• Quiescent current: ~0.5 mA when idle
• Protections:
  • Over‑current, short‑circuit and thermal protection on booster side
  • No full discharge battery protection (battery should be removed when low voltage detected)