TP4056 Lithium 18650 Battery Charger With DC-DC Step Up Voltage Converter Module (SKU#HW-357)

TP4056 18650 Battery Charger + Step‑Up DC‑DC Converter Module (HW‑357 / J5019)

Description:

Compact and versatile 1‑cell lithium‑ion charging module based on the TP4056 linear charger IC, combined with an adjustable boost (step‑up) converter. Ideal for charging 3.7 V (nominal) / 4.2 V (full) Li‑ion cells and providing regulated voltage output for portable electronics and DIY projects.

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)

Typical Performance:

• 5 V output @ ~1.4 A maximum
• 9 V output @ ~0.8 A
• 12 V output @ ~0.6 A
• Simultaneous charging and boosting: acceptable, but may impair charge termination if heavy load drawn (see datasheet advice)

Mechanical:

• PCB dimensions: approx. 33 × 24 × 6 mm
• Weight: ~11 g

Usage Notes:

• LED Indicators: Red = charging, Blue/Green = full charge
• Avoid heavy load during charging to ensure proper charge termination
• Not a protection board: lacks low-voltage cut‑off or over‑discharge battery protection
• Ideal for DIY mobile power supplies, solar chargers, and small electronics projects