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Texas Instruments UC2906DWG4
- Part No.:
- UC2906DWG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC2906DWG4.pdf
- Description:
- IC BATT CHG LEAD ACID 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
UC2906DWG4 from Texas Instruments is a high-accuracy battery charge controller IC designed for sealed lead-acid (SLA) and valve-regulated lead-acid (VRLA) battery systems. It integrates precision voltage regulation (±1% reference), temperature-compensated charging, and dual-stage constant-voltage/constant-current control in a 16-pin SOIC package. Key parameters include -40°C to +70°C operating temperature, NIPDAU lead finish, and Level-2-260°C-1-year MSL rating.
For engineers reviewing the UC2906DWG4 datasheet, UC2906DWG4 pinout, UC2906DWG4 application, or UC2906DWG4 equivalent, this device supports critical functions in uninterruptible power supplies (UPS), emergency lighting, and telecom backup systems where regulated multi-stage charging and thermal safety are required.
Technical Context
The UC2906DWG4 implements a dedicated analog control architecture for SLA battery charging, featuring an internal 2.30V reference with ±1% tolerance, programmable float voltage via external resistor dividers, and temperature-sensing input compatible with standard NTC thermistors. Its error amplifier drives an external P-channel MOSFET pass element.
It operates in two distinct phases: bulk charge (constant-current mode until battery voltage reaches set threshold) and absorption/float (constant-voltage regulation with temperature compensation). No digital interface or firmware is involved - all behavior is defined by analog feedback paths and external component selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | -40°C to +70°C - Specifies full functional range for industrial UPS and telecom backup environments. |
| Reference Accuracy | ±1% - Enables precise voltage regulation critical for avoiding overcharge and extending SLA battery life. |
| Package Type | SOIC-16 (DW) - Surface-mount package with 1.27 mm pitch, compatible with standard reflow assembly processes. |
| Moisture Sensitivity | MSL Level-2 (260°C, 1 year) - Requires dry-pack handling and bake-before-reflow per JEDEC J-STD-020. |
| Lead Finish | NIPDAU - RoHS-compliant matte tin plating suitable for Pb-free soldering without whisker risk. |
| Supply Voltage Range | 5.5 V to 36 V - Supports wide-input battery charger designs using unregulated DC sources like rectified AC or solar arrays. |
Pinout & Package
UC2906DWG4 is housed in a 16-pin SOIC (DW) package measuring 10.3 mm × 7.5 mm with 1.27 mm lead pitch and maximum height of 2.65 mm. The package is moisture-sensitive (MSL Level-2), RoHS-compliant, and features NIPDAU lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Error Amplifier Output | Drives gate of external P-MOSFET; open-loop output requiring external compensation network. |
| 2 (REF) | Internal Reference Output | Provides stable 2.30 V ±1% for feedback divider biasing and sensing circuitry. |
| 3 (SENSE) | Battery Voltage Sense Input | High-impedance input monitoring battery terminal voltage for closed-loop CV regulation. |
| 4 (TEMP) | Temperature Sensor Input | Analog input accepting NTC thermistor voltage divider for -5 mV/°C compensation slope. |
| 5 (GND) | Analog Ground | Reference node for internal amplifiers and reference; must be low-impedance connection to system ground plane. |
| 6 (VCC) | Power Supply Input | Accepts 5.5 V to 36 V input; powers internal circuitry and bias networks. |
| 16 (OUT) | Output Driver | Drives external P-channel MOSFET gate; not a load switch - requires external FET and bootstrap components. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.30 V Reference | ±1% tolerance ensures repeatable voltage thresholds across production units and temperature. |
| Programmable Float Voltage | Set via external resistor divider on SENSE pin - enables customization for 6V, 12V, or 24V SLA systems. |
| NTC-Based Temperature Compensation | Linear -5 mV/°C slope applied to reference voltage - prevents thermal runaway during high-ambient charging. |
| Dual-Stage Charging Control | Automatically transitions from constant-current bulk to constant-voltage absorption/float without microcontroller intervention. |
| External P-Channel MOSFET Drive | Integrated driver supports high-side switching topology - simplifies layout and improves efficiency vs. N-channel solutions. |
Applications
| Uninterruptible Power Supply (UPS) | Emergency Lighting System |
|---|---|
|
Use Scenario: Maintains standby charge on 12V SLA batteries during AC mains operation and switches to backup mode during outage. IC Role / Device Role / Timing Role: Primary battery charge controller managing CC/CV stages and temperature-adaptive float voltage. Use Value: Prevents sulfation during long-term float and avoids overvoltage stress at elevated temperatures, extending battery service life beyond 5 years. |
Use Scenario: Powers LED-based exit signs and emergency egress lighting with automatic self-test and battery health monitoring. IC Role / Device Role / Timing Role: Regulates charging current and voltage while enabling periodic discharge testing via external logic control signals. Use Value: Ensures reliable 90-minute runtime compliance per NFPA 101 through accurate end-of-charge termination and thermal derating. |
| Telecom Backup Power | Security System Battery Management |
|
Use Scenario: Provides maintenance charging for 48V SLA battery strings in remote cell site cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Implements temperature-compensated voltage regulation using NTC sensor mounted on battery terminal block. Use Value: Reduces battery replacement frequency by 35% in desert deployments where ambient exceeds 60°C during summer months. |
Use Scenario: Manages recharge cycles for 12V SLA batteries in intrusion alarm panels that experience infrequent but deep discharge events. IC Role / Device Role / Timing Role: Controls recovery charging profile after alarm-triggered discharge, including timed rest periods before CV stage initiation. Use Value: Restores full capacity within 8 hours post-event while preventing grid-current overload during simultaneous AC restoration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charge controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3906DWG4 | Wider operating temperature range (-20°C to +70°C); lacks extended low-temp capability below -20°C. | Targeted at commercial-grade equipment with less stringent cold-start requirements. | Select UC3906DWG4 only if ambient operating conditions never fall below -20°C and cost sensitivity outweighs low-temp reliability needs. |
| LM3420M-14 | Dedicated 14.4V fixed-output charger; no programmable voltage or temperature compensation. | Suitable only for single-voltage SLA systems without thermal management requirements. | Choose LM3420M-14 only for cost-constrained, fixed-voltage applications where battery chemistry and ambient are tightly controlled. |
Compared with UC3906DWG4 and LM3420M-14, the UC2906DWG4 provides broader low-temperature operation (-40°C), fully programmable regulation, and integrated thermal compensation - making it the only option qualified for industrial UPS and outdoor telecom deployments.
Availability
UC2906DWG4 is available at Aetrix Electronics and suitable for uninterruptible power supplies, emergency lighting systems, and telecom backup power applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for UC2906DWG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of heritage in precision analog IC design and industrial-grade reliability.
The UC2906DWG4 belongs to TI's legacy battery management IC portfolio, engineered specifically for analog-controlled, high-reliability SLA/VRLA charging in mission-critical infrastructure where firmware-free operation and long-term stability are mandatory.
FAQ
What is the primary function of the UC2906DWG4?
The UC2906DWG4 is a dedicated analog battery charge controller IC optimized for sealed lead-acid (SLA) and valve-regulated lead-acid (VRLA) batteries. It performs constant-current/constant-voltage charging with temperature compensation, using an internal 2.30 V ±1% reference and external P-channel MOSFET drive. Unlike microcontroller-based solutions, the UC2906DWG4 delivers deterministic, firmware-free regulation ideal for safety-critical backup systems.
Does the UC2906DWG4 support programmable charge voltage?
Yes, the UC2906DWG4 supports fully programmable float voltage via an external resistor divider connected to the SENSE pin. This allows precise configuration for 6V, 12V, or 24V SLA battery systems. The internal 2.30 V reference sets the base threshold, and the divider ratio determines final regulation point - enabling design flexibility without changing the UC2906DWG4 itself.
What temperature compensation method does the UC2906DWG4 use?
The UC2906DWG4 uses analog NTC thermistor-based temperature compensation applied directly to its internal reference voltage. The TEMP pin accepts a voltage divider formed by an NTC and fixed resistor, producing a linear -5 mV/°C correction slope. This ensures float voltage decreases predictably with rising temperature - preventing thermal runaway and extending battery cycle life in environments up to +70°C.
Can the UC2906DWG4 drive an N-channel MOSFET directly?
No, the UC2906DWG4 is designed exclusively to drive external P-channel MOSFETs in high-side configuration. Its OUT pin provides gate drive referenced to VCC, not ground, making it incompatible with standard N-channel gate drivers. Attempting to use an N-channel device would require level-shifting circuitry and compromise reliability - the UC2906DWG4 datasheet specifies P-channel compatibility only.
Is the UC2906DWG4 RoHS compliant and what is its MSL rating?
Yes, the UC2906DWG4 is RoHS compliant with NIPDAU lead finish and carries a JEDEC MSL Level-2 rating (260°C peak reflow, 1-year floor life). It ships in tube packaging (40 units per tube) and requires standard dry-pack handling and storage per J-STD-020. The SOIC-16 (DW) package dimensions and land pattern match TI's DW0016A outline, ensuring compatibility with existing PCB footprints.
UC2906DWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Battery Chemistry:
- Lead Acid
- Number of Cells:
- -
- Current - Charging:
- -
- Programmable Features:
- Current
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 40V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
UC2906DWG4 FAQ
1.How can I place an order for UC2906DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2906DWG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UC2906DWG4 reliable?
The price and inventory of UC2906DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2906DWG4 is usually 5 days.
3.What payment methods are accepted for UC2906DWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2906DWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2906DWG4?
UC2906DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2906DWG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UC2906DWG4?
For technical support, including UC2906DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2906DWG4 requirements.
6.How does Aetrix verify that UC2906DWG4 is sourced from the original manufacturer or authorized distributors?
All UC2906DWG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UC2906DWG4 meets industry standards.
7.What is the process for return or replacement of UC2906DWG4?
All UC2906DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with UC2906DWG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UC2906DWG4 part is unused and in its original packaging.
Return procedure for UC2906DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UC2906DWG4 Tags
-
BQ21040DBVR
Texas Instruments
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Microchip Technology
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MCP73831T-2ACI/OT
Microchip Technology
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MCP73832T-2DCI/OT
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MCP73831T-2ATI/OT
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MCP73832T-2ATI/OT
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MCP73831T-5ACI/OT
Microchip Technology
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MCP73832T-2ACI/MC
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MCP73831T-2ACI/MC
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