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Texas Instruments BQ24203DGNR
- Part No.:
- BQ24203DGNR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
BQ24203DGNR.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
BQ24203DGNR from Texas Instruments is a single-chip Li-ion/Li-polymer linear charge management IC for current-limited applications, featuring 4.1 V fixed regulation voltage, integrated 500 mA powerFET, ±0.5% voltage accuracy, battery insertion/removal detection, and charge termination by minimum current and safety timer. It targets space-constrained portable devices powered by wall adapters with limited current capability.
For engineers reviewing the BQ24203DGNR datasheet, BQ24203DGNR pinout, BQ24203DGNR application, or BQ24203DGNR equivalent, key selection considerations include its lack of temperature sensing (TS pin not connected), absence of STAT output (no charge status indication), fixed 4.1 V regulation, and compatibility with coke- or graphite-anode single-cell batteries in low-dropout charger designs.
Technical Context
The BQ24203DGNR operates as a linear charger without internal current regulation-relying on an external current-limited supply-and uses BAT-pin feedback for precise 4.1 V voltage regulation. It implements pre-charge conditioning (10–19 mA) for deeply discharged cells, taper-based charge termination (21–31 mA threshold), and a 9.3–15.5 s charge timer for fault backup.
It features automatic sleep mode when VCC falls below battery voltage, CE pin control (active-low enable), and no TS or STAT functionality per its DGN package marking "AZF". Its thermal protection and short-circuit detection (1–1.6 A trip) safeguard the integrated powerFET during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage | 4.1 V ±0.05 V - Fixed precision output for single-cell Li-ion/Li-polymer with graphite anodes. |
| Max Charge Current | 500 mA - Integrated P-channel powerFET supports full-rate charging without external pass device. |
| Dropout Voltage | 200–500 mV at 500 mA - Enables low-input-voltage operation with minimal headroom requirement. |
| Pre-charge Current | 10–19 mA - Revives cells below 2.8–3.2 V low-voltage threshold before fast-charge phase. |
| Charge Termination | 1.1 mA typical minimum-current threshold - Ensures full saturation and detects battery removal. |
| Operating Temp Range | –40°C to 125°C junction - Validated for industrial and extended-temperature embedded applications. |
| Sleep Threshold | VBAT – 10 mV - Enters ultra-low-power mode (<10 µA) when input supply is removed. |
Pinout & Package
Package: 8-pin MSOP-PowerPAD (DGN) with exposed thermal pad; 3.0 mm × 3.0 mm footprint, 0.65 mm pitch, RoHS-compliant CU NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage source | Connected to source of internal P-channel FET; accepts up to 16.5 V input from current-limited wall adapter. |
| VCC | Supply input | Power rail for internal circuitry; enables operation when ≥2.3 V and > VBAT – 10 mV. |
| VSS | Ground reference | Common return path for all analog and power functions; must be low-impedance connection to PCB ground plane. |
| BAT | Battery voltage sense | Direct connection to battery anode; provides feedback for 4.1 V regulation and low-voltage detection (2.8–3.2 V). |
| OUT | Charge current output | Drain of internal P-FET; delivers regulated 500 mA to battery with dropout as low as 200 mV. |
| CE | Charge enable control | Active-low digital input; forces charger shutdown and resets all timers when pulled high (>VCC – 0.3 V). |
| N/C | No connection | Pin 5 is unconnected internally; must remain floating per datasheet requirement. |
| NC | No connection | Pin 3 is unused in BQ24203DGNR (STAT function omitted); leave unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 500 mA PowerFET | Eliminates need for external pass transistor and associated layout area in compact portable designs. |
| ±0.5% Voltage Regulation Accuracy | Ensures safe, repeatable full-charge voltage for 4.1 V Li-ion cells-critical for cycle life and capacity retention. |
| Pre-charge + Safety Timer | Applies 10–19 mA to revive cells <2.95 V and halts charging if threshold not reached within ~2.1 hours. |
| Charge Termination by Minimum Current | Detects end-of-charge at 0.8–1.4 mA, enabling reliable cutoff even with aging or high-ESR batteries. |
| Low-Power Sleep Mode | Draws <10 µA when VCC is absent-prevents parasitic battery drain in battery-backed systems. |
Applications
| Wireless Headset Charging | Portable Medical Sensor |
|---|---|
|
Use Scenario: Compact Bluetooth headset with single-cell 3.7 V Li-polymer battery charged via micro-USB from current-limited wall adapter. IC Role / Device Role / Timing Role: Linear charge manager providing 4.1 V regulation, pre-charge recovery, and current-limited termination without external components. Use Value: Enables 8.5 × 12 mm PCB area reduction versus discrete solutions while maintaining cell longevity via tight voltage tolerance. |
Use Scenario: Battery-powered wearable ECG patch requiring reliable, low-heat charging in clinical environments. IC Role / Device Role / Timing Role: Primary charge controller managing 4.1 V graphite-anode cell with automatic sleep mode to preserve standby runtime. Use Value: Delivers <10 µA quiescent draw during disconnection-extending shelf life and reducing field recalibration needs. |
| Industrial Handheld Scanner | Smart Lock Backup Power |
|
Use Scenario: Rugged barcode scanner using 3.7 V Li-ion cell recharged via 5 V/500 mA USB port with no current limiting. IC Role / Device Role / Timing Role: Current-limiting interface between unregulated USB source and battery, enforcing safe 500 mA max delivery. Use Value: Prevents thermal runaway during charging by integrating short-circuit protection (1–1.6 A trip) and thermal foldback. |
Use Scenario: Battery-backed smart door lock with coin-cell backup, where main Li-ion must recharge silently during AC power restoration. IC Role / Device Role / Timing Role: Standalone charger activated only when AC adapter is present, with automatic recharge at 100 mV below regulation voltage. Use Value: Eliminates host MCU intervention-recharge triggers autonomously when VBAT drops to 4.0 V, ensuring always-ready operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion linear charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24202DGNR | Includes STAT output (charge-in-progress, complete, fault) but same 4.1 V regulation and no TS pin. | Required when visual or MCU-monitored charge status is needed; adds LED or GPIO signaling capability. | Select BQ24202DGNR if system requires real-time charge state feedback without adding external logic. |
| BQ24205DGNR | 4.1 V regulation, no STAT, no TS-identical feature set to BQ24203DGNR but rated for –40°C to 85°C ambient (vs. –40°C to 125°C junction). | Suitable for commercial-grade applications where extended junction temperature operation is unnecessary. | Choose BQ24205DGNR for cost-sensitive consumer products with standard ambient temp requirements. |
Compared with BQ24203DGNR, BQ24202DGNR adds diagnostic visibility at minor BOM cost, while BQ24205DGNR trades junction temperature margin for qualification scope-both retain identical regulation, current, and timing behavior in functional operation.
Availability
BQ24203DGNR is available at Aetrix Electronics and suitable for wireless audio accessories, portable medical sensors, industrial handheld scanners, smart lock backup power systems, and other battery-powered applications requiring stable component supply with long lifecycle support.
Supply support for BQ24203DGNR 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in power management innovation since 1930.
The BQ24203DGNR belongs to TI's bq2420x family of single-cell Li-ion linear chargers, designed specifically for cost-sensitive, space-constrained portable electronics using current-limited wall adapters-emphasizing integration, reliability, and ease of use over programmability.
FAQ
What is the regulation voltage of the BQ24203DGNR?
The BQ24203DGNR has a fixed regulation voltage of 4.1 V with ±0.5% accuracy across temperature and load. This value is factory-trimmed and applies to single-cell Li-ion or Li-polymer batteries with graphite anodes. The BQ24203DGNR does not support voltage adjustment-the 4.1 V setting is confirmed by its AZF device marking and datasheet specification table.
Does the BQ24203DGNR support temperature monitoring?
No, the BQ24203DGNR does not support temperature monitoring. Its TS pin is not connected internally, and the device marking "AZF" explicitly denotes omission of both STAT and TS functions. Unlike BQ24200/BQ24201 variants, the BQ24203DGNR lacks temperature-sense comparators and related thresholds-making it unsuitable for applications requiring thermal charge inhibition.
What is the maximum input voltage rating for the BQ24203DGNR?
The BQ24203DGNR supports a maximum input voltage of 16.5 V on its IN and VCC pins relative to VSS. This rating is specified under Absolute Maximum Ratings and allows compatibility with common 12 V wall adapters. Operation above this level risks permanent damage-even briefly-so input transient suppression is recommended in high-noise environments.
How does the BQ24203DGNR handle battery removal during charging?
The BQ24203DGNR detects battery removal via its minimum-current termination threshold (0.8–1.4 mA). When charge current falls below this level while the battery voltage remains above the recharge threshold (4.0 V), the device terminates charge and enters sleep mode. Reinsertion of the battery triggers automatic restart if VBAT is below 4.0 V-no external reset is required for the BQ24203DGNR to resume charging.
Is the BQ24203DGNR pin-compatible with other bq2420x variants?
Yes, the BQ24203DGNR shares the identical 8-pin MSOP-PowerPAD (DGN) package and pinout with all bq2420x family members-including BQ24200DGNR, BQ24202DGNR, and BQ24205DGNR. Pin functions for IN, VCC, VSS, BAT, OUT, CE, and N/C are fully aligned; unused pins (STAT, TS) are left unconnected per variant configuration, preserving PCB layout reuse across the family.
BQ24203DGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant
- Programmable Features:
- Current, Timer
- Fault Protection:
- Over Temperature, Short Circuit
- Charge Current - Max:
- 500mA
- Battery Pack Voltage:
- 4.1V
- Voltage - Supply (Max):
- 13.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
BQ24203DGNR FAQ
1.How can I place an order for BQ24203DGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24203DGNR 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 BQ24203DGNR reliable?
The price and inventory of BQ24203DGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24203DGNR is usually 5 days.
3.What payment methods are accepted for BQ24203DGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24203DGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24203DGNR?
BQ24203DGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24203DGNR 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 BQ24203DGNR?
For technical support, including BQ24203DGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24203DGNR requirements.
6.How does Aetrix verify that BQ24203DGNR is sourced from the original manufacturer or authorized distributors?
All BQ24203DGNR 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 BQ24203DGNR meets industry standards.
7.What is the process for return or replacement of BQ24203DGNR?
All BQ24203DGNR units undergo pre-shipment inspection (PSI). If there is an issue with BQ24203DGNR, 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 BQ24203DGNR part is unused and in its original packaging.
Return procedure for BQ24203DGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24203DGNR Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
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MCP73831T-2ACI/OT
Microchip Technology
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MCP73832T-2ACI/OT
Microchip Technology
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MCP73831T-2DCI/OT
Microchip Technology
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MCP73832T-2DCI/OT
Microchip Technology
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MCP73831T-2ATI/OT
Microchip Technology
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MCP73832T-2ATI/OT
Microchip Technology
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MCP73831T-5ACI/OT
Microchip Technology
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MCP73832T-2ACI/MC
Microchip Technology
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MCP73831T-2ACI/MC
Microchip Technology
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MCP73831T-2ATI/MC
Microchip Technology
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