{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24205DGNRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24205DGNRG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ24205DGNRG4","factsUrl":"https://icboms.com/api/mcp/products/BQ24205DGNRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24205DGNRG4, single-cell Li-Ion/Polymer linear charger IC, 500mA max charge current, 4.1V battery pack voltage, 8-HVSSOP package, -40°C to 125°C operating temperature.","salesMarkdown":"The BQ24205DGNRG4 is officially listed as obsolete. That means TI no longer manufactures this exact order code, and no last-time-buy window is open. If you need a drop-in replacement with the same pinout and charge profile, you will need to evaluate the current-generation single-cell Li-Ion charger family from TI – the BQ24205DGNRG4 uses a 4.1V battery pack voltage, which is less common than the 4.2V standard, so pin-compatibility across the family is not guaranteed without a datasheet cross-check. ## Charge current and battery chemistry This is a constant-current linear charger for single-cell Lithium Ion or Lithium Polymer batteries. The maximum charge current is 500 mA – that sets the charge rate for a single cell. For a 1000 mAh cell, you are looking at roughly a 2-hour charge time. The constant-current profile means no switching noise on the battery line, which matters for noise-sensitive analog loads sharing the battery rail. The battery pack voltage is regulated to 4.1V, not the more common 4.2V. If your design calls for a 4.2V termination voltage, this part will under-charge the cell – you lose about 5-7% of capacity. Check your battery spec: some 4.2V-rated cells accept 4.1V termination with reduced capacity; others require the full 4.2V for proper balancing. ## Programmable features and protection Two programmable features are available: charge current and charge timer. The current is set with an external resistor; the timer provides a safety timeout to terminate charging if the battery never reaches the regulation voltage. Fault protection includes over-temperature and short-circuit – the chip shuts down the pass transistor if the die exceeds the thermal limit or the output is shorted. The supply voltage range goes up to 13.5V max, which covers most 5V USB or 9V wall-adapter inputs. The linear regulator drops the difference between input and battery voltage as heat – at 500 mA with a 5V input and a 3.7V battery, you dissipate about 0.65 W. The exposed pad on the 8-HVSSOP package is essential; without a good thermal via connection to a copper plane, the die will hit the thermal shutdown threshold. ## Package and reflow considerations The package is an 8-HVSSOP – essentially an 8-lead MSOP with an exposed thermal pad underneath. The pad is the main heat path, so the PCB footprint must include a matching copper area and thermal vias to an inner ground plane. Without that, the thermal resistance climbs and the over-temperature protection kicks in at lower ambient temperatures. The package is surface-mount, supplied in Tape & Reel, which is standard for pick-and-place. That wide range is typical for TI's charger ICs and gives headroom for designs that see high ambient temperatures or self-heating from the linear regulator.","metaTitle":"BQ24205DGNRG4 Li-Ion Charger IC, 500mA","metaDescription":"BQ24205DGNRG4 single-cell Li-Ion/Polymer linear charger, 500mA max charge current, 4.1V battery pack voltage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width) Exposed Pad","Product Status":"Obsolete","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature, Short Circuit","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant","Base Product Number":"BQ24205","Battery Pack Voltage":"4.1V","Charge Current - Max":"500mA","Operating Temperature":"-40°C~125°C(TJ)","Programmable Features":"Current, Timer","Voltage - Supply (Max)":"13.5V","Supplier Device Package":"8-HVSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d9a2603e1298939b8790cfaa4790a3a5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ24205DGNRG4 obsolete?","answer":"Yes, the BQ24205DGNRG4 is officially obsolete. TI no longer produces it. The part is available only through independent distribution on a sourced-to-order basis against an RFQ."},{"question":"What is the replacement for BQ24205DGNRG4?","answer":"TI has not published an official direct replacement for this specific order code. The BQ24205DGNRG4 uses a 4.1V battery regulation voltage, which is less common than 4.2V. To find a current-production alternative, you would need to evaluate TI's single-cell Li-Ion charger family and verify pin compatibility and charge voltage against your BOM."},{"question":"What is the maximum charge current of BQ24205DGNRG4?","answer":"The maximum charge current is 500 mA, set by an external resistor. It operates as a constant-current linear charger."},{"question":"Is BQ24205DGNRG4 compatible with a 4.2V battery?","answer":"The BQ24205DGNRG4 regulates the battery pack voltage to 4.1V. If you connect a 4.2V-rated cell, the charger will terminate at 4.1V, under-charging the battery by about 5-7% of capacity. Some cells tolerate this; others require the full 4.2V termination for proper charge balancing. Check your battery manufacturer's specification."},{"question":"Where can I buy BQ24205DGNRG4?","answer":"As an obsolete part, the BQ24205DGNRG4 is not available through the factory or authorized distribution. We source it through independent surplus and broker channels. Submit an RFQ with your target quantity and we will confirm availability and current pricing at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24205DGNRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24205DGNRG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}