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Texas Instruments BQ25070DQCR
- Part No.:
- BQ25070DQCR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
BQ25070DQCR.pdf
- Description:
- IC BATT CHG IRON PHOS 1C 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
BQ25070DQCR from Texas Instruments is a single-input, single-cell LiFePO₄ linear battery charger IC with integrated 50mA LDO regulator. It delivers up to 1A charge current, supports 30V input rating with 10.5V over-voltage protection, and implements a fast-charge-to-float algorithm optimized for LiFePO₄ chemistry. It is used in space-constrained portable devices such as smart phones and media players requiring compact, thermally regulated charging.
For engineers reviewing the BQ25070DQCR datasheet, BQ25070DQCR pinout, BQ25070DQCR application, or BQ25070DQCR equivalent, key selection criteria include its 3.7V overcharge voltage threshold, 3.5V float voltage, programmable charge current via CTRL interface (300mA default), thermal regulation at 125°C, and 2mm × 3mm WSON-10 package with exposed thermal pad.
Technical Context
The BQ25070DQCR uses a LiFePO₄-specific charge algorithm that eliminates constant-voltage mode: it fast-charges to 3.7V overcharge threshold, then relaxes to 3.5V float voltage-reducing total charge time versus conventional Li-ion profiles. Its internal control loop continuously monitors junction temperature and dynamically reduces charge current above 125°C.
Input power management includes under-voltage lockout (3.3V typ), 10.5V input OVP with 100mV hysteresis and 100μs blanking, and soft-start to limit inrush. The 4.9V ±10% LDO remains active independently of CTRL when VIN is between 3.3V and 10.5V, supplying up to 50mA for USB transceivers or low-power system rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Programmable up to 1A via CTRL pulse interface; default 300mA for BQ25070DQCR. |
| Battery Voltage Regulation | 3.7V overcharge threshold and 3.5V float voltage-optimized for LiFePO₄ cell voltage profile. |
| LDO Output | 4.9V ±10%, 50mA max-powers external circuitry without requiring separate regulator. |
| Input Voltage Range | 3.75V to 28V operating; 30V absolute max with 10.5V OVP-supports unregulated AC adapters and USB sources. |
| Thermal Regulation | Active at 125°C junction temperature; reduces charge current to maintain safe die temperature. |
| Package | WSON-10 (DQC), 2mm × 3mm, exposed thermal pad-enables high-density PCB layout with efficient heat dissipation. |
| TS Input Monitoring | Voltage-based NTC interface with programmable cold/hot thresholds (e.g., 25% and 12.5% of VLDO) for battery temperature safety. |
Pinout & Package
Package: WSON-10 (DQC), 2mm × 3mm, thermally enhanced with exposed GND pad. Pin 1 marked by dot; top-side view shown in datasheet Figure 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Power input | Accepts 3.75–28V from USB or AC adapter; bypassed with ≥0.1μF ceramic capacitor to GND. |
| IMON (Pin 2) | Current monitor output | Provides 1mA/A scaled analog voltage (0–1V = 0–1A) for host current sensing using 1kΩ to GND. |
| GND (Pins 3, 9) | Ground reference | Primary signal ground; pins electrically tied to exposed thermal pad-must be soldered to PCB ground plane. |
| LDO (Pin 4) | LDO output | Regulated 4.9V supply for external logic; requires 0.1μF ceramic bypass to GND. |
| TS (Pin 5) | NTC monitoring input | Voltage divider interface for battery pack thermistor-monitors temperature to suspend charging outside safe range. |
| BAT (Pin 6) | Battery sense | Connects directly to battery anode; senses voltage for charge algorithm and UVLO/OVCH detection. |
| CTRL (Pin 7) | Configuration interface | Single-wire pulse-input for enabling/disabling, setting charge current (4–11 pulses), and configuring DPM/TS range. |
| CHG (Pin 8) | Status indicator | Open-drain output pulled low during precharge/fast-charge; high-Z at full charge; pulses on TS fault. |
| OUT (Pin 10) | System output | Connects to BAT and powers system load; shares current path with battery during charge. |
Key Features
| Feature | Design Value |
|---|---|
| LiFePO₄-optimized charge algorithm | Eliminates CV phase-fast-charges to 3.7V then floats at 3.5V-reducing total charge time vs. Li-ion profiles. |
| Integrated 50mA LDO | 4.9V ±10% output independent of CTRL state-powers USB PHY or microcontroller peripherals without extra regulator. |
| Programmable charge current | 11 discrete settings (93mA–1A) via simple CTRL pulse counting-no external resistors or DAC required. |
| Thermal regulation & shutdown | Reduces charge current above 125°C junction temp; shuts down at 155°C with 20°C hysteresis-prevents thermal runaway. |
| Input over-voltage protection | 10.5V OVP with 100μs deglitch and automatic recovery-protects against faulty/unregulated wall adapters. |
Applications
| Smartphones | Portable Media Players |
|---|---|
Use Scenario: Compact handheld device with single-cell LiFePO₄ battery charged via micro-USB port and powered simultaneously by same rail. IC Role / Device Role / Timing Role: BQ25070DQCR acts as primary battery charger and system power source-regulating charge current, providing 4.9V LDO for USB transceiver, and signaling charge status via CHG pin. Use Value: Enables simplified power architecture with no external LDO or charge controller, reducing BOM count and PCB area while maintaining LiFePO₄-specific voltage accuracy (±7% charge current regulation). | Use Scenario: Battery-powered audio/video player requiring reliable charging from variable-input sources (USB 2.0, car adapter, wall charger) and low-quiescent operation during standby. IC Role / Device Role / Timing Role: BQ25070DQCR manages dual-role power path-charging battery while powering SoC and codec; uses TS input to halt charge if battery overheats during playback. Use Value: Delivers 1A peak charge current with thermal foldback, ensuring safe operation in sealed enclosures; LDO supplies clean 4.9V to audio DAC, minimizing noise coupling. |
| Mobile Phones | Low-Power Handheld Devices |
Use Scenario: Entry-tier mobile phone with cost-sensitive bill-of-materials, using unregulated AC adapter and requiring robust overvoltage and thermal protection. IC Role / Device Role / Timing Role: BQ25070DQCR serves as complete charging solution-accepting up to 30V input, clamping at 10.5V OVP, regulating LiFePO₄ voltage precisely, and indicating status via open-drain CHG output. Use Value: Eliminates need for external OVP circuitry and discrete current-sense resistor; 7% charge current accuracy ensures consistent battery lifetime across production units. | Use Scenario: Industrial handheld scanner or medical sensor with small form factor, long battery life, and mandatory battery temperature monitoring per IEC 62368. IC Role / Device Role / Timing Role: BQ25070DQCR provides battery charging, system power, and NTC-based thermal cutoff-using TS pin to read thermistor voltage divider and suspend charge if outside 0°C–45°C window. Use Value: Integrates safety-critical temperature monitoring without MCU intervention; CHG pin pulses at 100ms on TS fault-enabling immediate host response without polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LiFePO₄ linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25071DQCR | Same pinout and package; differs in default charge current (500mA vs. 300mA) and marking (QUT vs. QUS); identical electrical specs otherwise. | Higher default current suits applications needing faster baseline charge without CTRL reprogramming. | Select BQ25071DQCR only if 500mA default aligns with thermal budget and battery C-rate requirements. |
| TP4056 | Li-ion focused (4.2V CV), no LDO, no TS input, no OVP >6.5V, SOT-23-5 package-fundamentally different architecture and protection scope. | Not suitable for LiFePO₄; lacks voltage thresholds, thermal monitoring, and input ruggedness required for unregulated adapters. | TP4056 is not a functional alternative-BQ25070DQCR provides LiFePO₄-specific regulation, integrated LDO, and 30V input tolerance absent in TP4056. |
Compared with BQ25071DQCR, BQ25070DQCR offers lower default charge current for tighter thermal control in constrained layouts; compared with TP4056, it delivers LiFePO₄-optimized voltage setpoints, integrated 50mA LDO, and 10.5V OVP-making it uniquely suited for ruggedized portable LiFePO₄ systems.
Availability
BQ25070DQCR is available at Aetrix Electronics and suitable for smartphones, portable media players, and low-power handheld devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for BQ25070DQCR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The BQ25070DQCR belongs to TI's bqSwitcher™ battery management portfolio, designed specifically for space-constrained LiFePO₄ charging in portable consumer electronics where integration, thermal safety, and input ruggedness are critical.
FAQ
What is the default charge current setting for the BQ25070DQCR?
The BQ25070DQCR has a factory-default charge current of 300mA, established by its CTRL interface programming. This value is confirmed in TI's SLUSA66 datasheet ordering table and corresponds to the "ILIM(DEF)" parameter. The current can be reprogrammed to 11 discrete levels (93mA to 1A) using pulse-counting on the CTRL pin, but the device powers up at 300mA unless otherwise instructed. This default balances thermal performance and charge speed for typical LiFePO₄ cells in compact designs.
Does the BQ25070DQCR support Li-ion batteries?
No, the BQ25070DQCR is explicitly designed for single-cell LiFePO₄ batteries and does not support standard Li-ion (LiCoO₂) chemistry. Its charge algorithm omits constant-voltage regulation and instead uses a 3.7V overcharge threshold followed by 3.5V float-matching LiFePO₄'s flat voltage curve. Applying it to Li-ion would result in undercharging (3.5V float < 4.2V full) and potential capacity loss. TI specifies LiFePO₄ compatibility in the device description, features list, and functional diagrams of the BQ25070DQCR datasheet.
How does the TS (thermistor sense) pin function on the BQ25070DQCR?
The TS pin on the BQ25070DQCR is a voltage-based input that monitors battery pack temperature via an external NTC thermistor in a resistor divider network referenced to the LDO output. It triggers charging suspension if the sensed voltage falls outside programmable cold (e.g., 25% of VLDO) and hot (e.g., 12.5% of VLDO) thresholds. During fault, the CHG pin pulses at 100ms with 50% duty cycle. The BQ25070DQCR does not digitize temperature-it compares analog voltage levels, making calibration dependent on thermistor R-T curve and divider resistor selection per equations in the BQ25070DQCR datasheet.
What is the purpose of the IMON pin on the BQ25070DQCR?
The IMON pin on the BQ25070DQCR provides a current-proportional analog voltage output: 1mA of IMON current corresponds to 1A of input charge current (KIMON = 1mA/A, ±10%). When a 1kΩ resistor is connected from IMON to GND, the resulting voltage (0–1V) linearly represents 0–1A input current. This enables host microcontrollers to monitor real-time charge current without shunt resistors or amplifiers. The BQ25070DQCR datasheet confirms IMON accuracy, maximum voltage (1.25V), and usage in typical application circuits.
Can the BQ25070DQCR operate without connecting the TS pin?
Yes, the BQ25070DQCR can operate without an active TS network. For non-temperature-monitored applications, TI recommends tying TS to a fixed valid voltage-specifically, using R1 = 490kΩ and R2 = 100kΩ in the LDO-to-GND divider to set TS at ~25% of VLDO, keeping it within the operational window. This prevents charging suspension while disabling thermal monitoring. The BQ25070DQCR datasheet explicitly documents this configuration in the Applications section and notes that TS is optional, not mandatory, for basic functionality.
BQ25070DQCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Iron Phosphate
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 1A
- Battery Pack Voltage:
- 3.5V
- Voltage - Supply (Max):
- 10.2V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x2)
BQ25070DQCR FAQ
1.How can I place an order for BQ25070DQCR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ25070DQCR 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 BQ25070DQCR reliable?
The price and inventory of BQ25070DQCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ25070DQCR is usually 5 days.
3.What payment methods are accepted for BQ25070DQCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ25070DQCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ25070DQCR?
BQ25070DQCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ25070DQCR 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 BQ25070DQCR?
For technical support, including BQ25070DQCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ25070DQCR requirements.
6.How does Aetrix verify that BQ25070DQCR is sourced from the original manufacturer or authorized distributors?
All BQ25070DQCR 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 BQ25070DQCR meets industry standards.
7.What is the process for return or replacement of BQ25070DQCR?
All BQ25070DQCR units undergo pre-shipment inspection (PSI). If there is an issue with BQ25070DQCR, 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 BQ25070DQCR part is unused and in its original packaging.
Return procedure for BQ25070DQCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ25070DQCR Tags
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BQ21040DBVR
Texas Instruments
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Microchip Technology
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MCP73832T-2ACI/MC
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Microchip Technology
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