BQ29443DRBT Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
Secondary lithium-ion battery protection IC with 4.5V detection threshold voltage, 28V maximum input voltage, and single-channel overvoltage protection in 8-pin SON 3x3mm package. Provides reliable cell-level protection against overcharge conditions without adjustable threshold configuration. Available lead-free with worldwide distribution.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- BQ29443DRBT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Secondary lithium-ion cell protection with fixed 4.5V overvoltage detection threshold for consistent protection
- 28V maximum input voltage rating providing margin for battery pack voltage transients and charger spikes
- Compact 8-pin SON (3x3mm) package enabling integration into slim battery protection PCBs
- Single-channel secondary protector complements primary protection ICs for redundant Li-ion cell safety
Applications
The BQ29443DRBT is designed as a secondary protection layer for lithium-ion battery cells in portable electronics such as smartphones, tablets, power banks, and wearable devices. It acts as a redundant overvoltage protector alongside primary battery management ICs to prevent catastrophic cell failure due to overcharge conditions reaching 4.5V. Its compact SON package and simple fixed-threshold design simplify integration into space-constrained battery protection circuits requiring high reliability.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | DETECTION THRESHOLD VOLTAGE IS 4.5V |
| Adjustable Threshold | NO |
| Analog IC - Other Type | SECONDARY BATTERY PROTECTOR |
| Input Voltage-Max | 28V |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max (Vsup) | 25V |
| Supply Voltage-Min (Vsup) | 4V |
| Supply Voltage-Nom (Vsup) | 17V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.5V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Philippines |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the detection threshold voltage of the BQ29443DRBT?
The BQ29443DRBT has a fixed overvoltage detection threshold of 4.5V per cell. When the cell voltage exceeds this level, the device triggers protection to prevent overcharging, which can cause cell damage or thermal runaway in lithium-ion batteries.
What is the role of the BQ29443DRBT as a secondary protector?
As a secondary battery protector, the BQ29443DRBT provides a redundant layer of overvoltage protection separate from the primary battery management IC. If the primary protection fails, the secondary protector activates to prevent hazardous overcharge of the lithium-ion cell.
What package does the BQ29443DRBT use?
The BQ29443DRBT comes in an 8-pin SON package (3mm x 3mm, JESD-30 S-PDSO-N8), a small no-lead surface-mount package with excellent thermal performance and a compact footprint suitable for portable device battery pack PCBs.
Is the detection threshold adjustable on the BQ29443DRBT?
No, the BQ29443DRBT has a fixed, non-adjustable detection threshold of 4.5V. This simplifies the circuit design by eliminating the need for external resistor dividers, reducing component count and improving reliability in battery protection applications.
Is the BQ29443DRBT compatible with multi-cell battery packs?
The BQ29443DRBT is a single-channel device designed for single-cell overvoltage protection with a 28V maximum input voltage rating. For multi-cell battery packs, one device per cell or a dedicated multi-cell protection IC would be required for full pack protection.
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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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