Description
The DD30CRTA 12V Lead Acid Battery Charger Module is an advanced PWM switch-mode battery charger controller designed specifically for 12V lead-acid batteries. Engineered in a compact package requiring minimal external components, it manages the entire multi-stage charging cycle—including automatic trickle charge, constant current charge, over-charge, and float charge modes.
Equipped with intelligent internal voltage regulation, deeply discharged batteries are automatically trickle-charged at 17.5% of the programmed constant current until safe thresholds are met. Once the over-charge phase completes and current drops to 38%, the module automatically transitions into float-charge mode (13.55V typical) to compensate for self-discharge. Additional safeguards include under-voltage lockout, overcurrent protection, and automatic recharging when battery voltage dips.
Note: Product images are for reference only; actual appearance, labeling, or component housing colors may vary slightly based on manufacturing batches. Lead-acid batteries are not included.
Key Features
- Advanced PWM Switch-Mode Controller: Utilizes high-efficiency switching regulation to manage complex multi-stage charging for 12V lead-acid cells.
- Multi-Stage Charging Architecture: Seamlessly cycles through automatic trickle charge, constant current, fixed over-charge (14.8V), and float charge (13.55V) modes.
- Automatic Conditioning of Deeply Discharged Cells: Automatically initiates a 17.5% trickle charge when battery voltage falls below 75% of regulation limits.
- Smart Float Charge & Auto-Recharge: Automatically drops to 13.55V float voltage upon completion and triggers a new cycle if voltage drops below 83.95%.
- Comprehensive Circuit Protection: Built-in overcurrent protection, battery overvoltage safeguards, and input under-voltage lockout.
- Wide Power Supply Tolerance: Operates efficiently across a 15V to 28V DC input range (16V to 25V DC recommended).
- Broad Capacity Compatibility: Suitable for charging 1Ah up to 10,000Ah 12V lead-acid battery banks.
Benefits
- Optimized Battery Lifespan: Multi-stage regulation prevents overcharging, reduces thermal stress, and maintains peak capacity over long service intervals.
- Autonomous Operation: Intelligent cycle management automatically switches between charging modes and restarts when auxiliary loading occurs.
- Reliable Maintenance Charging: Float charge mode compensates for self-discharge and external loads without damaging the battery chemistry.
- Streamlined Prototyping: Compact board layout requires minimal external components for easy integration into custom power enclosures.
- Enhanced Operational Safety: Integrated protective mechanisms shield your charging setup against electrical faults and deep-discharge damage.
Applications
- Automotive & Car Battery Charging: Reliable charging and maintenance controller for 12V automotive and vehicle backup batteries.
- Solar Power Systems: Ideal charge controller module for 12V lead-acid solar generator setups and off-grid battery banks.
- Uninterruptible Power Supplies (UPS): Internal power management and charging board for backup UPS systems and emergency lighting.
- Electric Bicycles & Mobility: Charging circuit integration for 12V lead-acid e-bike packs and utility scooters.
- Portable Industrial & Medical Gear: Robust charging module for field instruments, loudspeakers, and portable equipment.
Package Includes
- 1 x DD30CRTA Lead Acid Battery Charger 12V Charging Device 3A
- 1 x Instruction Manual / Quick Guide
Specifications
| Parameter | Specification |
|---|---|
| Item Type | 12V Lead-Acid Battery Charger Controller Module |
| Input Power Supply Range | 15V to 28V DC (Recommended: 16V to 25V DC) |
| Constant Charging Current (A) | 3.0 A (Programmable via single sense resistor) |
| Battery Compatibility | 12V Lead-Acid Batteries (Suitable for 1Ah to 10,000Ah capacity) |
| Over-Charge Regulation Voltage | 14.8V DC (Typical, with ±1.5% accuracy) |
| Float Charge Regulation Voltage | 13.55V DC (Typical, 91.57% of over-charge voltage) |
| Trickle Charge Threshold | Activated when battery voltage is below 75% of over-charge voltage |
| Safety Protections | Overcurrent Protection | Battery Overvoltage Protection | Under-Voltage Lockout | Auto-Sleep Mode |
| Net Weight / Shipping Weight | Standard class / 0.005 kg |
| Shipping Dimensions | 7 cm × 3 cm × 2 cm |
