Overview
The UC3906DWTR is a sealed lead-acid battery charger integrated circuit manufactured by Texas Instruments. This IC is designed to optimally control the charge and hold cycle for sealed lead-acid batteries, ensuring maximum battery capacity and life. It features internal state logic that provides three separate charge states: a high current bulk-charge state, a controlled over-charge state, and a precision float-charge or standby state. The UC3906DWTR operates over a commercial temperature range of -20°C to 70°C and is available in a 16-pin SOIC (DW) package.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (DW) |
| Pins | 16 |
| Operating Temperature Range (°C) | -20 to 70 |
| Package Quantity | 40 (Tube), 2000 (Reel) |
| Supply Current (Typical Standby) | 1.6 mA |
| Base Drive Current (Maximum) | 25 mA |
| RoHS Compliance | Yes, RoHS & Green |
Key Features
- Optimum control for maximum battery capacity and life
- Internal state logic provides three charge states: bulk-charge, over-charge, and float-charge
- Precision reference tracks battery requirements over temperature
- Controls both voltage and current at charger output
- System interface functions
- Typical standby supply current of only 1.6 mA
- Supply under-voltage sense circuit with logic output
- Over-charge indicate output and over-charge terminate input
- Charge enable comparator with trickle bias output for low current turn-on mode
Applications
The UC3906DWTR is suitable for a wide range of applications involving sealed lead-acid batteries, including but not limited to:
- Automotive systems requiring battery charging and maintenance
- Industrial power backup systems
- Telecommunication equipment
- Uninterruptible Power Supplies (UPS)
- Other battery-powered electronic systems requiring precise charging cycles
Q & A
- What is the primary function of the UC3906DWTR?
The UC3906DWTR is a sealed lead-acid battery charger integrated circuit designed to optimally control the charge and hold cycle for sealed lead-acid batteries.
- What are the three charge states provided by the UC3906DWTR?
The three charge states are: high current bulk-charge state, controlled over-charge state, and precision float-charge or standby state.
- What is the operating temperature range of the UC3906DWTR?
The operating temperature range is -20°C to 70°C.
- What is the typical standby supply current of the UC3906DWTR?
The typical standby supply current is 1.6 mA.
- Does the UC3906DWTR have RoHS compliance?
Yes, the UC3906DWTR is RoHS & Green compliant.
- How does the UC3906DWTR control the charger output?
The UC3906DWTR controls both the voltage and current at the charger output using separate voltage loop and current limit amplifiers.
- What is the purpose of the supply under-voltage sense circuit in the UC3906DWTR?
The supply under-voltage sense circuit initializes charging cycles at power on and drives a logic output to indicate when input power is present.
- Can the UC3906DWTR be used to prevent high current charging during abnormal conditions?
Yes, the charge enable comparator with trickle bias output can be used to implement a low current turn-on mode, preventing high current charging during abnormal conditions such as a shorted or reversed battery.
- What types of applications is the UC3906DWTR suitable for?
The UC3906DWTR is suitable for applications involving sealed lead-acid batteries, such as automotive systems, industrial power backup systems, telecommunication equipment, and UPS systems.
- What package options are available for the UC3906DWTR?
The UC3906DWTR is available in a 16-pin SOIC (DW) package, with options for tube and reel packaging.
