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Texas Instruments BQ24075RGTT
- Part No.:
- BQ24075RGTT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
BQ24075RGTT.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:439
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Product details
Overview
BQ24075RGTT from Texas Instruments is a standalone 1-cell Li-ion linear battery charger IC with integrated dynamic power path management (DPPM), supporting up to 1.5-A charge current, 5.5-V regulated system output, and SYSOFF-controlled battery disconnect. It operates from 4.35 V to 6.4 V input, features programmable input current limit via ILIM, and targets compact portable systems requiring simultaneous system power and battery charging.
For engineers reviewing the BQ24075RGTT datasheet, BQ24075RGTT pinout, BQ24075RGTT application, or BQ24075RGTT equivalent, key selection criteria include its 16-pin VQFN (RGT) package, SYSOFF-enabled battery isolation, DPPM architecture for seamless system/battery power handoff, and USB-compliant input current configuration via EN1/EN2 pins.
Technical Context
The BQ24075RGTT implements a dual-loop power path architecture: the DPPM loop maintains system output voltage (VOUT = 5.5 V) by dynamically reducing charge current when input supply cannot sustain both system load and charging, while the VIN-DPM loop protects against weak USB sources by throttling input current before input collapse. Its linear charging stage integrates high-accuracy voltage regulation (±0.5% VBAT(REG) at 4.2 V) and current sensing via ISET resistor feedback.
Charging progression follows three phases-conditioning, constant-current (CC), and constant-voltage (CV)-with independent safety timers (TMR), programmable termination current (not applicable to BQ24075), and thermal regulation that reduces charge current above 125°C junction temperature. The SYSOFF input directly controls an internal FET to disconnect battery from system output, enabling true battery isolation during adapter operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.35 V to 6.4 V - supports standard USB and unregulated wall adapters; 28-V absolute max rating prevents damage from transient overvoltage. |
| Charge Current | Up to 1.5 A - set by external resistor on ISET pin (590 Ω–8.9 kΩ); enables fast charging of 1-cell Li-ion packs in space-constrained devices. |
| System Output Voltage | 5.5 V - regulated VOUT tracks fixed 5.5 V (not battery voltage), ensuring stable system rail regardless of battery state-of-charge. |
| DPPM Threshold | 4.3 V - triggers dynamic charge current reduction when VOUT drops to 4.3 V, prioritizing system load over battery charging. |
| Input Overvoltage Protection | 6.6 V (typ) - clamps input at 6.6 V ±0.2 V to protect internal circuitry; includes 110-mV hysteresis and 50-μs blanking time. |
| Thermal Regulation | 125°C - reduces charge current if junction temperature exceeds 125°C; requires RθJA ≤ 44.5°C/W PCB layout for full 1.5-A operation. |
| Package | VQFN-16 (RGT), 3.0 mm × 3.0 mm - thermally enhanced exposed pad design optimized for compact portable applications. |
Pinout & Package
VQFN-16 (RGT) package with 3.0 mm × 3.0 mm body size and exposed thermal pad connected internally to VSS. Requires soldering thermal pad to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (13) | Power Input | Accepts 4.35–6.4 V DC from USB or adapter; includes UVLO (3.3 V), OVP (6.6 V), and VIN-DPM protection. |
| BAT (2,3) | Battery Interface | Connects to Li-ion cell anode; senses battery voltage and delivers charge current up to 1.5 A; bypassed with 4.7–47 μF ceramic capacitor. |
| OUT (10,11) | System Power Output | Regulated 5.5-V rail for system load; remains active during charging and supplies peak current when battery supplements adapter. |
| SYSOFF (15) | Battery Disconnect Control | Active-high input that opens internal FET between BAT and OUT, isolating battery from system even when adapter is present. |
| ISET (16) | Charge Current Programming | Resistor-to-ground sets fast-charge current (590 Ω = 1.5 A, 8.9 kΩ = 100 mA); also provides real-time current monitoring voltage. |
| ILIM (12) | Input Current Limit Programming | Resistor-to-ground sets total input current limit (1.1 kΩ–8 kΩ) when EN2=1/EN1=0; includes system + charge current. |
| EN1/EN2 (6,5) | USB Input Mode Selection | Configures 100-mA (USB100), 500-mA (USB500), or resistor-programmed input current; internally pulled down. |
| CE (4) | Charge Enable | Active-low control: high disables charging but keeps OUT active; low enables full charging functionality. |
| TS (1) | NTC Thermistor Input | Monitors 10-kΩ NTC in battery pack for temperature-based charge suspend; connect 10-kΩ resistor if unused. |
| TMR (14) | Safety Timer Control | Resistor-to-ground programs pre-charge and fast-charge timers (18–72 kΩ); open = default timers, short = disabled. |
| PGOOD (7) | Input Power Status | Open-drain output pulled low when valid input detected (>3.3 V and <6.6 V); used for system power-good signaling. |
| CHG (9) | Charge Status Indicator | Open-drain output pulled low during charging; high-impedance when complete or disabled; supports LED or logic interface. |
| VSS (8) | Ground Reference | Main ground connection; must be tied to PCB ground plane and thermal pad (internal connection). |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Path Management (DPPM) | Maintains stable 5.5-V system output while charging by automatically reducing charge current when input supply is insufficient - eliminates system brownouts and extends battery cycle life. |
| SYSOFF-Controlled Battery Disconnect | Enables hardware-level isolation of battery from system load using a single GPIO, critical for safety-critical shutdown, firmware updates, or battery removal without powering down the system. |
| USB-Compliant Input Current Configuration | Supports selectable 100-mA/500-mA modes via EN1/EN2 pins plus resistor-programmable up to 1.5 A - meets USB-IF inrush and steady-state current requirements without external circuitry. |
| Integrated Thermal Regulation | Reduces charge current in real time when junction temperature reaches 125°C - prevents thermal runaway and allows safe operation in sealed enclosures with limited airflow. |
| Input-Based Dynamic Power Management (VIN-DPM) | Prevents collapse of weak USB sources by limiting input current before input voltage drops below 3.3 V - ensures reliable operation with low-quality or long-cable USB ports. |
Applications
| TWS Charging Case | Gaming Accessory |
|---|---|
Use Scenario: Compact wireless earbud charging case with USB-C input and dual-battery management. IC Role / Device Role / Timing Role: Standalone linear charger providing 5.5-V system rail and 1.5-A charge current while isolating battery during firmware update via SYSOFF. Use Value: Enables instant system power-on from dead battery, eliminates need for separate LDO, and supports USB compliance without external current-sense resistors. |
Use Scenario: Bluetooth gaming controller with rechargeable Li-ion battery and low-latency system response. IC Role / Device Role / Timing Role: Power path manager delivering uninterrupted 5.5-V system supply during high-current RF transmission bursts, supplemented by battery discharge. Use Value: Prevents controller reset during peak load by maintaining VOUT ≥ 4.3 V via DPPM, extending usable runtime beyond adapter-only operation. |
| Video Doorbell | Portable Medical Device |
Use Scenario: Battery-powered smart doorbell with motion-triggered HD video streaming and Wi-Fi connectivity. IC Role / Device Role / Timing Role: Charger IC managing intermittent solar/USB charging while powering system during wake events; SYSOFF used for deep sleep isolation. Use Value: Reduces standby current drain by disconnecting battery during long idle periods, improving months-long battery life on single charge. |
Use Scenario: Handheld pulse oximeter with FDA-cleared battery safety requirements and clinical-grade reliability. IC Role / Device Role / Timing Role: Safety-aware charger implementing NTC temperature monitoring, thermal foldback, and precise 4.2-V CV regulation per IEC 62368-1 guidelines. Use Value: Meets medical device thermal and voltage accuracy requirements without external supervision circuitry, simplifying BOM and certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24079RGTT | Same 16-pin RGT package, identical DPPM and SYSOFF functionality, but VBAT(REG) = 4.1 V (optimized for LiFePO₄) vs. BQ24075RGTT's 4.2 V (Li-ion). | Used where lower battery voltage chemistry (e.g., LiFePO₄) is required; not suitable for standard 4.2-V Li-ion cells without revalidation. | Select BQ24079RGTT only when designing for 3.6-V nominal LiFePO₄ batteries; otherwise BQ24075RGTT is optimal for 4.2-V Li-ion. |
| BQ24074RGTT | Shares same package and DPPM architecture, but adds ITERM pin for programmable charge termination current and supports higher 10.5-V input OVP. | Required for applications needing adjustable termination threshold (e.g., aging compensation) or wider-input adapters (e.g., 9-V wall warts). | Choose BQ24074RGTT when termination current tuning or >6.6-V input capability is needed; BQ24075RGTT offers simpler, cost-optimized 4.2-V Li-ion charging. |
Compared with BQ24079RGTT and BQ24074RGTT, the BQ24075RGTT provides the most direct fit for 4.2-V Li-ion cells in USB-powered portable devices where fixed 5.5-V system output, battery disconnect, and minimal external components are prioritized over termination flexibility or extended input range.
Availability
BQ24075RGTT is available at Aetrix Electronics and suitable for TWS charging cases, video doorbells, and portable medical devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for BQ24075RGTT 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 and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.
The BQ2407x product line was designed specifically for space-constrained portable electronics requiring integrated Li-ion charging and intelligent power path management - eliminating discrete MOSFETs, diodes, and controllers in compact battery-powered systems.
FAQ
What is the maximum continuous charge current supported by the BQ24075RGTT?
The BQ24075RGTT supports a maximum continuous charge current of 1.5 A, set by the resistor connected between ISET and VSS (590 Ω yields 1.5 A). This value is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the official datasheet. Thermal regulation will reduce this current if the junction temperature exceeds 125°C, so proper PCB thermal design with the exposed pad is essential to sustain full 1.5-A operation. The BQ24075RGTT does not support higher currents.
Does the BQ24075RGTT support USB Battery Charging (BC) 1.2 or proprietary fast-charging protocols?
No, the BQ24075RGTT does not support USB BC 1.2 or any proprietary fast-charging protocols such as Qualcomm Quick Charge or Samsung Adaptive Fast Charging. It is a linear charger with fixed input current limits (100 mA/500 mA via EN1/EN2) and no D+/D− detection circuitry. Its USB compliance is limited to meeting USB-IF inrush and steady-state current specifications through VIN-DPM and programmable ILIM - it does not negotiate voltage or current beyond those two modes.
How does the SYSOFF function operate in the BQ24075RGTT, and what happens to the system output when SYSOFF is asserted?
When SYSOFF is driven high, the BQ24075RGTT opens an internal FET between the BAT and OUT pins, physically disconnecting the battery from the system load. During this state, the system continues to be powered from the IN supply (if present) via the regulated 5.5-V OUT rail. If no input power is present, OUT is disconnected from both IN and BAT, resulting in system shutdown. This behavior is explicitly documented in the Pin Functions table and Figure 10-13 of the BQ24075RGTT datasheet.
Can the BQ24075RGTT be used with lithium iron phosphate (LiFePO₄) batteries?
The BQ24075RGTT is not recommended for LiFePO₄ batteries because its battery regulation voltage is fixed at 4.2 V, whereas LiFePO₄ cells require ~3.6 V termination. Using it with LiFePO₄ would overcharge the cell, risking safety hazards. For LiFePO₄, TI specifies the BQ24079RGTT, which has a factory-set 4.1-V VBAT(REG) - closer to LiFePO₄ needs - and shares identical pinout and SYSOFF functionality with the BQ24075RGTT.
What is the purpose of the ILIM pin on the BQ24075RGTT, and how does it interact with EN1/EN2 settings?
The ILIM pin on the BQ24075RGTT programs the total input current limit (system + charge current) when EN2 = 1 and EN1 = 0 - a mode distinct from USB100/USB500. A resistor from ILIM to VSS (1.1 kΩ–8 kΩ) sets the limit from ~0.2 A to 1.5 A. When EN2/EN1 are in other states (e.g., 0/0 for USB100), ILIM is ignored. This dual-mode input current control allows flexible adapter and USB source handling without redesigning the current-sense network. The BQ24075RGTT datasheet confirms this behavior in Table 7-2 and Section 9.3.3.
BQ24075RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer
- Fault Protection:
- Over Temperature, Over Voltage, Reverse Current, Short Circuit
- Charge Current - Max:
- 1.5A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6.4V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
BQ24075RGTT FAQ
1.How can I place an order for BQ24075RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24075RGTT 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 BQ24075RGTT reliable?
The price and inventory of BQ24075RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24075RGTT is usually 5 days.
3.What payment methods are accepted for BQ24075RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24075RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24075RGTT?
BQ24075RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24075RGTT 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 BQ24075RGTT?
For technical support, including BQ24075RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24075RGTT requirements.
6.How does Aetrix verify that BQ24075RGTT is sourced from the original manufacturer or authorized distributors?
All BQ24075RGTT 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 BQ24075RGTT meets industry standards.
7.What is the process for return or replacement of BQ24075RGTT?
All BQ24075RGTT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24075RGTT, 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 BQ24075RGTT part is unused and in its original packaging.
Return procedure for BQ24075RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24075RGTT Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
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