UCC3957M-3G4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UCC3957M-3G4 is a Lithium-Ion battery protector circuit IC from Texas Instruments supporting selectable 3-cell or 4-cell configurations with overcurrent protection in a 16-pin SSOP package. It monitors and protects Li-Ion battery packs against overcharge, overdischarge, and overcurrent fault conditions. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3957M-3G4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -20.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Selectable 3-cell or 4-cell Li-Ion operation in a single device reduces the need for separate part numbers across different battery pack configurations
- Built-in overcurrent protection safeguards battery cells and load circuitry from damaging short-circuit and excessive discharge current events
- 4-channel battery protector monitors individual cell voltages across multi-cell Li-Ion packs for precise per-cell protection
- Compact 16-pin SSOP (R-PDSO-G16) package minimizes PCB footprint in portable battery-powered product designs
Applications
The UCC3957M-3G4 is designed for Li-Ion battery pack protection in portable electronics including laptops, power tools, medical devices, and handheld instruments. It ensures safe operation by preventing overcharge and over-discharge conditions that can permanently damage or cause thermal runaway in lithium-ion cells. The selectable 3- or 4-cell configuration makes it versatile for a range of battery pack voltages used in consumer and industrial portable power applications.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | SELECTABLE THREE OR FOUR CELL OPERATION, OVERCURRENT PROTECTION |
| Adjustable Threshold | NO |
| Analog IC - Other Type | BATTERY PROTECTOR |
| JESD-30 Code | R-PDSO-G16 |
| Number of Channels | 4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.04mA |
| Supply Voltage-Max (Vsup) | 20V |
| Supply Voltage-Min (Vsup) | 6.5V |
| Supply Voltage-Nom (Vsup) | 16V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | OTHER |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC3957M-3G4:
Unitrode Corporation Fixed, 4 Channel, BICMOS, PDSO16
Frequently Asked Questions
What does the UCC3957M-3G4 protect against in a Li-Ion battery pack?
The UCC3957M-3G4 protects Li-Ion battery packs from overcharge, overdischarge, and overcurrent (short-circuit) conditions. It continuously monitors cell voltages across up to 4 cells and activates protection FETs to disconnect the load or charger when a fault is detected. This prevents permanent cell damage and reduces the risk of thermal runaway associated with improperly managed lithium-ion cells.
Can the UCC3957M-3G4 be used for both 3-cell and 4-cell battery packs?
Yes. The UCC3957M-3G4 supports selectable 3-cell or 4-cell Li-Ion operation, allowing a single device to be configured for either battery pack topology. This flexibility eliminates the need to stock separate protection ICs for different pack configurations, simplifying procurement and reducing inventory cost in multi-product designs using different nominal battery voltages.
What package does the UCC3957M-3G4 use?
The UCC3957M-3G4 is housed in a 16-pin SSOP (Shrink Small Outline Package) with JEDEC code R-PDSO-G16 and a 0.25 mm pitch. The plastic/epoxy body is compatible with standard SMT reflow assembly. Note that the 'Pbfree Code: No' indicates this specific part number is not lead-free, so designers in RoHS-restricted regions should verify compliance requirements before selecting this variant.
How many cells can the UCC3957M-3G4 monitor simultaneously?
The UCC3957M-3G4 has 4 monitoring channels, allowing it to independently monitor the voltage of up to 4 individual Li-Ion cells in a series-connected pack. Each channel provides per-cell overvoltage and undervoltage detection, ensuring that protection is triggered by any single cell going out of specification rather than relying only on overall pack voltage measurement.
What are typical applications for the UCC3957M-3G4?
Typical applications include rechargeable battery packs for laptops, portable medical instruments, power tools, handheld test equipment, and industrial mobile devices. The device is used as the primary safety IC in the battery management circuit, often paired with MOSFET switches that physically disconnect the battery from the load or charger when a fault condition is detected.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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