My Inquiry
My Account
Texas Instruments BQ24300DSGT
- Part No.:
- BQ24300DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24300DSGT.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:490
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ24300DSGT from Texas Instruments is an integrated Li-ion battery front-end protection IC that functions as a linear regulator with overvoltage, overcurrent, and battery overvoltage protection. It delivers regulated 5.5V output up to 250 mA, features 10.5V input overvoltage threshold, 300 mA input current limit, and operates within 3.3–26 V input range for portable charging systems.
For engineers reviewing the BQ24300DSGT datasheet, BQ24300DSGT pinout, BQ24300DSGT application, or BQ24300DSGT equivalent, this device serves as a critical safety guard between AC adapters and Li-ion battery chargers-ensuring robust immunity to voltage spikes, precise thermal shutdown at 150°C, and soft-start/soft-stop behavior to prevent inrush and ringing.
Technical Context
The BQ24300DSGT implements three independent protection loops: input overvoltage (OVP) with 10.5 V threshold and 100 mV hysteresis, input overcurrent (OCP) with 300 mA limit and 5 ms blanking time, and battery overvoltage (BVOVP) at 4.35 V with 275 mV hysteresis. All thresholds are internally fixed and temperature-compensated.
It operates as a series linear regulator below OVP, maintaining 5.5 V ±0.2 V output with 75 mV dropout at 250 mA. The CE pin enables active low control, while PGATE drives an external P-channel MOSFET for optional reverse-polarity protection up to –30 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Regulation Voltage | 5.5 V ±0.2 V - maintains stable supply to downstream charger ICs despite input variation |
| Input Overvoltage Threshold | 10.5 V - triggers protection against adapter faults while ignoring sub-100 µs transients |
| Input Current Limit | 300 mA - limits fault current to prevent damage during short-circuit or cable fault conditions |
| Battery Overvoltage Threshold | 4.35 V - safeguards Li-ion cells from overcharge by disconnecting when pack voltage exceeds safe level |
| Thermal Shutdown | 150 °C - disables output to prevent die damage under sustained high-power dissipation |
| Dropout Voltage | 75 mV at 250 mA - enables efficient regulation even at low VIN–VOUT differentials |
| Standby Current | 95 µA - minimizes quiescent drain when CE is high and system is idle |
Pinout & Package
Package: 2 mm × 2 mm, 8-pin WSON (DSG) with exposed thermal pad connected to VSS. RoHS-compliant, moisture sensitivity level 2 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply | Accepts 3.3–26 V DC; requires ≥0.1 µF ceramic bypass capacitor to VSS |
| VSS (Pin 2) | Ground reference | Primary ground return; thermally coupled to exposed PowerPAD™ |
| PGATE (Pin 3) | P-FET gate driver | Drives external P-channel MOSFET for reverse-polarity protection; clamped to 15 V max |
| NC (Pins 4 & 7) | No connect | Internally unused; must remain unconnected per TI design guidelines |
| CE (Pin 5) | Chip enable input | Active-low logic control; internal 200 kΩ pull-down allows floating operation |
| VBAT (Pin 6) | Battery voltage sense | Monitors pack voltage via high-impedance input (10 nA bias); requires RBAT resistor for safety |
| OUT (Pin 8) | Regulated output | Delivers protected 5.5 V to downstream charger; requires ≥1 µF ceramic capacitor to VSS |
Key Features
| Feature | Design Value |
|---|---|
| Triple-protection architecture | Simultaneous monitoring of input voltage, input current, and battery voltage with independent response timers |
| Soft-start / soft-stop control | Gradual gate drive ramp-up/down prevents inrush current and input voltage ringing during power transitions |
| High immunity to false triggering | 100 µs deglitch on power-on and 64 µs blanking on OVP/OCP ensure rejection of ESD and cable-induced transients |
| Optional reverse-polarity protection | PGATE supports external P-FET to block –30 V input faults without additional ICs or diodes |
| Thermal shutdown with hysteresis | Turns off at 150 °C and resumes only after cooling to 130 °C, preventing thermal cycling instability |
Applications
| Bluetooth Headsets | Low-Power Handheld Devices |
|---|---|
|
Use Scenario: Compact wearable device powered by single-cell Li-ion battery charged via micro-USB adapter. IC Role / Device Role / Timing Role: Front-end protector placed between USB port and charger IC (e.g., bq24080), enforcing safe input conditions before enabling charge path. Use Value: Prevents catastrophic failure from adapter overvoltage spikes or reverse insertion; eliminates need for discrete TVS and fuse. |
Use Scenario: Portable medical sensor with USB-C charging and strict battery safety compliance requirements. IC Role / Device Role / Timing Role: Standalone protection supervisor ensuring battery voltage never exceeds 4.35 V during charge cycle. Use Value: Meets IEC 62368-1 transient immunity and battery safety mandates without firmware intervention. |
| USB-Powered Portable Instruments | Li-ion Backup Power Modules |
|
Use Scenario: Handheld multimeter drawing <200 mA from USB host, requiring clean 5.5 V rail for analog front-end. IC Role / Device Role / Timing Role: Regulator + protector providing stable, ripple-free supply while rejecting noisy or out-of-spec USB sources. Use Value: Maintains measurement accuracy by eliminating input-induced noise coupling into sensitive ADC references. |
Use Scenario: Industrial controller with supercapacitor-assisted Li-ion backup, where main supply may experience brownouts or surges. IC Role / Device Role / Timing Role: Isolates backup battery from primary power domain during fault events using fast OVP/OCP response. Use Value: Extends backup runtime integrity by preventing battery discharge into faulty upstream circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq24304DSGT | Fixed 4.5 V output regulation (vs. 5.5 V); identical OVP/OCP/BVOVP thresholds and timing | Used where downstream charger requires lower input voltage; not interchangeable without circuit redesign | Select when system-level VOUT must be ≤4.5 V and full 5.5 V headroom is unnecessary |
| bq24305DSGT | Fixed 5.0 V output regulation; same protection architecture and pinout; BVOVP unchanged at 4.35 V | Suitable for mixed-voltage systems needing tighter regulation than bq24300 but higher than bq24304 | Choose for compatibility with 5.0 V nominal charger inputs while retaining identical safety margins |
Compared with bq24304DSGT and bq24305DSGT, the BQ24300DSGT provides the highest regulated output (5.5 V), enabling greater margin for voltage drop across PCB traces and connectors-critical in space-constrained portable designs where downstream ICs require robust supply headroom.
Availability
BQ24300DSGT is available at Aetrix Electronics and suitable for Bluetooth headsets, low-power handheld devices, and USB-powered portable instruments requiring stable component supply with full lifecycle traceability and long-term production support.
Supply support for BQ24300DSGT 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 over 50 years of innovation in high-reliability IC design.
The bq2430x family was engineered specifically for Li-ion battery safety in portable charging front-ends-delivering integrated OVP, OCP, and BVOVP in ultra-small WSON packages for space- and cost-sensitive consumer and industrial applications.
FAQ
What is the primary function of the BQ24300DSGT in a Li-ion charging system?
The BQ24300DSGT acts as a dedicated front-end protection IC between the input power source (e.g., USB adapter) and the battery charger IC. It continuously monitors input voltage, input current, and battery voltage, and autonomously disconnects the output if any parameter exceeds safe limits-including 10.5 V input overvoltage, 300 mA input overcurrent, or 4.35 V battery overvoltage. Its role is purely hardware-based safety enforcement, independent of system firmware.
Does the BQ24300DSGT require external components to operate, and which ones are mandatory?
Yes-the BQ24300DSGT requires three mandatory external components: a ≥0.1 µF ceramic capacitor from IN to VSS, a ≥1 µF ceramic capacitor from OUT to VSS, and a 100 kΩ–470 kΩ resistor (RBAT) between VBAT and the battery positive terminal. The RBAT resistor is critical for safety: it limits fault current into the battery if the IC fails. No external FET or feedback network is needed for basic operation.
Can the BQ24300DSGT be used without connecting the VBAT pin?
No-VBAT must be connected either through the recommended RBAT resistor to the battery positive terminal or directly to VSS if battery overvoltage protection is intentionally disabled. Leaving VBAT floating violates the absolute maximum rating (–0.3 V to 7 V) and risks unpredictable behavior or latch-up, as the internal BVOVP comparator relies on this node for sensing.
How does the CE pin affect the operation of the BQ24300DSGT?
The CE pin is an active-low enable input. When CE is pulled low (≤0.4 V), the BQ24300DSGT performs full protection and regulation. When CE is high (≥1.4 V), the internal pass FET is forced off, disabling output regardless of input conditions. An internal 200 kΩ pull-down ensures default-enable behavior if CE is left unconnected-making it suitable for always-on applications without host control.
What thermal management considerations apply to the BQ24300DSGT in continuous 250 mA operation?
In continuous 250 mA operation at maximum input voltage (26 V), power dissipation reaches ~5.25 W (26 V − 5.5 V × 0.25 A). With RθJA = 75 °C/W, junction temperature rise would exceed safe limits without proper layout. TI mandates connection of the exposed PowerPAD™ to a large copper ground plane via ≥6 thermal vias. Derating is required above 85 °C ambient; operation beyond 125 °C junction triggers thermal shutdown at 150 °C.
BQ24300DSGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ24300DSGT FAQ
1.How can I place an order for BQ24300DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24300DSGT 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 BQ24300DSGT reliable?
The price and inventory of BQ24300DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24300DSGT is usually 5 days.
3.What payment methods are accepted for BQ24300DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24300DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24300DSGT?
BQ24300DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24300DSGT 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 BQ24300DSGT?
For technical support, including BQ24300DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24300DSGT requirements.
6.How does Aetrix verify that BQ24300DSGT is sourced from the original manufacturer or authorized distributors?
All BQ24300DSGT 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 BQ24300DSGT meets industry standards.
7.What is the process for return or replacement of BQ24300DSGT?
All BQ24300DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24300DSGT, 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 BQ24300DSGT part is unused and in its original packaging.
Return procedure for BQ24300DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24300DSGT Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
