Overview
The UC2906DW, produced by Texas Instruments, is a highly integrated battery charger controller designed specifically for sealed lead-acid batteries. This IC encompasses all the necessary circuitry to optimally control the charge and hold cycle of these batteries. It monitors and controls both the output voltage and current of the charger through three distinct charge states: a high current bulk-charge state, a controlled over-charge state, and a precision float-charge or standby state. This ensures optimum charging conditions over an extended temperature range, enhancing battery capacity and life.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (DW) |
| Pins | 16 |
| Operating Temperature Range (°C) | -40 to 70 |
| Package Quantity | 40 (Carrier), 2000 (Reel) |
| Supply Under-Voltage Sense | Yes, with logic output |
| Standby Supply Current | Typically 1.6mA |
| Base Drive to External Pass Device | Up to 25mA |
| 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 1.6mA
- Supply under-voltage sense circuit with logic output
- Over-charge state monitoring and termination capabilities
Applications
The UC2906DW is designed for use in various applications involving sealed lead-acid batteries, such as:
- Battery backup systems
- Uninterruptible power supplies (UPS)
- Automotive systems
- Industrial power systems
- Telecommunication equipment
Q & A
- What is the primary function of the UC2906DW? The UC2906DW is a battery charger controller designed to optimally control the charge and hold cycle for sealed lead-acid batteries.
- What are the three charge states controlled by the UC2906DW? The three charge states are high current bulk-charge, controlled over-charge, and precision float-charge or standby state.
- What is the operating temperature range of the UC2906DW? The operating temperature range is -40°C to 70°C.
- How much standby supply current does the UC2906DW typically consume? The typical standby supply current is 1.6mA.
- Does the UC2906DW have a supply under-voltage sense feature? Yes, it has a supply under-voltage sense circuit with a logic output.
- Can the over-charge state be externally monitored and terminated? Yes, the over-charge state can be externally monitored and terminated using the over-charge indicate output and over-charge terminate input.
- Is the UC2906DW RoHS compliant? Yes, the UC2906DW is RoHS & Green compliant.
- What is the maximum base drive current to an external pass device? The maximum base drive current is up to 25mA.
- In what types of applications is the UC2906DW commonly used? It is commonly used in battery backup systems, UPS, automotive systems, industrial power systems, and telecommunication equipment.
- What package types are available for the UC2906DW? The UC2906DW is available in SOIC (DW) and PDIP (N) packages.
