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Texas Instruments BQ24113RHLR
- Part No.:
- BQ24113RHLR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
BQ24113RHLR.pdf
- Description:
- IC BATT CHG LI-ION 1-2CEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,558
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Product details
Overview
BQ24113RHLR from Texas Instruments is a system-controlled, synchronous switch-mode Li-ion/Li-polymer battery charge-management IC with integrated power FETs. It supports 1- or 2-cell packs (4.2 V / 8.4 V), delivers up to 2-A charge current, operates at 1.1 MHz fixed frequency, and features high-side current sensing via SNS pin for precision regulation. It is used in portable medical devices requiring reliable, thermally robust charging under host processor control.
For engineers reviewing the BQ24113RHLR datasheet, BQ24113RHLR pinout, BQ24113RHLR application, or BQ24113RHLR equivalent, key selection considerations include its system-controlled architecture (CE/CMODE/STATx interface), programmable precharge/fast-charge current via ISET1/ISET2, thermal monitoring via TS/VTSB, and 20-pin VQFN (3.5 mm × 4.5 mm) package with exposed thermal pad tied to VSS.
Technical Context
The BQ24113RHLR implements a three-phase charge algorithm-preconditioning, constant-current, and constant-voltage-with termination based on user-programmable minimum current (via ISET2) and a safety timer set by TTC capacitor. Its synchronous PWM controller drives internal high-side P-channel and low-side N-channel MOSFETs, enabling >90% efficiency at 2-A output with no external gate drivers.
Charge management is fully delegated to the host: CE enables/suspends charging, CMODE selects precharge vs. fast-charge mode, and STAT1/STAT2 provide open-drain status signals (charge-in-progress, done, fault). Battery voltage regulation accuracy is ±1%, current regulation accuracy is ±10% (fast-charge) and ±20% (precharge/termination), and temperature thresholds are set via NTC thermistor on TS referenced to VTSB's 3.15-V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.2 V (1-cell) or 8.4 V (2-cell), selected via CELLS pin - enables single hardware design across dual battery configurations |
| Max Charge Current | 2 A - supported by integrated 500 mΩ P-FET and 150 mΩ N-FET, eliminating need for external power switches |
| Switching Frequency | 1.1 MHz - allows use of small 2.2-μH inductors and compact ceramic output capacitors (4.7–47 μF) |
| Current Sensing | High-side, via SNS pin with 0.1-μF bypass - avoids ground path disruption and enables accurate battery current measurement |
| Thermal Regulation | NTC-based monitoring via TS pin with 3.15-V VTSB bias - supports cold/hot/cutoff thresholds programmable with resistor divider |
| Supply Range | 4.35 V to 16 V on IN/VCC - accommodates wide-input adapters (e.g., 5 V USB, 9 V wall adapters, 12 V industrial supplies) |
| Package | VQFN-20 (3.5 mm × 4.5 mm, 0.5-mm pitch) with exposed thermal pad - provides 15.8°C/W junction-to-board thermal resistance for sustained 2-A operation |
Pinout & Package
VQFN-20 package (3.50 mm × 4.50 mm) with exposed thermal pad electrically connected to VSS. Pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 OUT | Power switch output | Connects to inductor; clamped by TVS diode to PGND to suppress switching spikes during fault conditions |
| 2 STAT1 | Status output | Open-drain signal indicating charge-in-progress; pulled low when charging active |
| 3, 4 IN | Input supply | Accepts 4.35–16 V adapter input; internally powers VCC rail and high-side gate driver |
| 5 PG | Power-good indicator | Open-drain output active when valid VCC detected; used for adapter presence detection |
| 6 VCC | Analog supply | Internal LDO output; requires 0.1-μF bypass to VSS for stable reference and oscillator operation |
| 7 TTC | Timer capacitor connection | Sets charge safety timer (25–572 min); capacitor value determines timeout duration per KTTC = 2.6 min/nF |
| 8 ISET1 | Fast-charge current set | Voltage input (1 V typical) sets fast-charge current via KISET1 = 1000 V/A; resistor to ground programs target |
| 9 ISET2 | Precharge/termination current set | Voltage input (100 mV typical) sets precharge and termination current via KISET2 = 1000 V/A |
| 10 VSS | Analog ground | Reference for all analog circuitry; must be low-impedance connection to PCB ground plane |
| 11 VTSB | TS bias regulator output | 3.15-V regulated output powering NTC voltage divider; requires 0.1–1-μF bypass to VSS |
| 12 TS | Temperature sense input | Monitors NTC divider voltage against internal thresholds (LTF/HTF/TCO) to enable/disable charging |
| 13 NC | No connection | Pin 13 is unconnected on BQ24113RHLR; must remain floating - not used for CELLS or FB in this variant |
| 14 BAT | Battery voltage sense | Direct connection to battery pack anode; bypassed with 0.1-μF capacitor to PGND to reject noise from long leads |
| 15 SNS | Current-sense input | High-side sensing node; measures voltage drop across external RSNS to regulate charge current |
| 16 CE | Charger enable | Active-low digital input; high state suspends charging and forces sleep mode (315 μA quiescent) |
| 17, 18 PGND | Power ground | Return path for inductor current and power FETs; separate from analog ground (VSS) but tied via thermal pad |
| 19 STAT2 | Status output | Open-drain signal indicating charge completion; pulled low when regulation phase ends successfully |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous power stage | Eliminates need for external MOSFETs and gate drivers - reduces BOM count and layout area while maintaining >90% efficiency at 2 A |
| System-controlled interface | CE, CMODE, STAT1, STAT2 pins allow full host-processor orchestration of charge state machine - essential for embedded OS integration |
| Programmable charge timing | TTC capacitor sets absolute charge timeout (25–572 min), providing fail-safe backup to current-based termination |
| High-accuracy current regulation | ±10% fast-charge and ±20% precharge/termination accuracy over –40°C to +125°C - ensures consistent battery health across environments |
| Thermal foldback protection | Automatic reduction of charge current when die temperature exceeds safe limit - prevents thermal runaway without host intervention |
| Reverse leakage prevention | Internal circuitry blocks battery discharge through IN path when adapter is disconnected - extends shelf life of powered-off devices |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
|
Use Scenario: Battery-powered ECG or pulse oximeter operating continuously in clinical environments with intermittent AC charging. IC Role / Device Role / Timing Role: System-controlled charge manager coordinating with MCU to suspend charging during data acquisition bursts and resume during idle periods. Use Value: Prevents measurement interference from switching noise via synchronized charge pauses and maintains <100-μA sleep current when inactive. |
Use Scenario: Rugged barcode scanner used in warehouse logistics with daily hot-swap battery replacement and 8-hour shift runtime. IC Role / Device Role / Timing Role: Dual-cell (8.4 V) charger enforcing strict temperature cutoff (via TS/NTC) during rapid recharging between shifts. Use Value: Enables safe 2-A charging without external thermal sensors, reducing bill-of-materials and improving time-to-charge by 35% versus linear solutions. |
| Emergency Response Radios | Portable Ultrasound Probes |
|
Use Scenario: Mission-critical two-way radio deployed in extreme ambient temperatures (-20°C to +60°C) with field-replaceable Li-ion packs. IC Role / Device Role / Timing Role: Temperature-monitored charger disabling charge below -10°C (cold threshold) and above +45°C (hot threshold) using VTSB-referenced NTC. Use Value: Prevents lithium plating and thermal runaway - certified for IEC 62368-1 compliance in safety-critical portable equipment. |
Use Scenario: High-resolution ultrasound probe requiring ultra-low-noise power delivery during imaging to avoid RF interference. IC Role / Device Role / Timing Role: Low-EMI 1.1-MHz synchronous charger with high-side current sensing isolating battery return path from analog ground. Use Value: Eliminates ground-loop noise coupling into sensitive analog front-end, preserving image SNR without additional filtering components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion charge-management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24113ARHLR | Includes enhanced thermal shutdown hysteresis and improved VTSB regulation accuracy (±10% vs. ±10% typical, same spec) | Identical pinout and function; intended for new designs where tighter thermal margin is required | Select BQ24113ARHLR for designs targeting extended lifetime in high-temperature enclosures (>65°C ambient) |
| BQ24115RHLR | Externally programmable charge voltage (2.1–15.5 V) via FB pin; lacks fixed 4.2/8.4 V modes and CELLS pin | Supports LiFePO₄ (3.6 V/cell) and custom chemistries; requires external feedback resistors and host voltage control logic | Choose BQ24115RHLR only if battery chemistry flexibility beyond Li-ion/Li-polymer is required - not drop-in compatible |
Compared with BQ24113RHLR, BQ24113ARHLR offers identical functionality with minor process-level reliability enhancements, while BQ24115RHLR replaces fixed-voltage operation with programmable regulation - requiring redesign of voltage-setting network and firmware control.
Availability
BQ24113RHLR is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, emergency response radios, and portable ultrasound probes requiring stable component supply across multi-year production cycles.
Supply support for BQ24113RHLR 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 connectivity technologies, with decades of leadership in power management ICs.
The bqSWITCHER™ product line - including BQ24113RHLR - was designed specifically for high-efficiency, integrated Li-ion/Li-polymer charging in space-constrained portable electronics, emphasizing thermal robustness, host-controllable operation, and minimal external component count.
FAQ
What is the maximum continuous charge current supported by the BQ24113RHLR?
The BQ24113RHLR supports up to 2 A of continuous charge current. This is achieved using its integrated synchronous power stage - a 500-mΩ P-channel high-side MOSFET and 150-mΩ N-channel low-side MOSFET - which eliminates external switch requirements and sustains full current with proper PCB thermal design (e.g., 2 oz copper, thermal vias under exposed pad). The BQ24113RHLR datasheet specifies 2.2 A absolute maximum output current, but 2 A is the rated continuous operational limit under recommended conditions.
Does the BQ24113RHLR support LiFePO₄ battery chemistry?
No, the BQ24113RHLR does not support LiFePO₄ batteries. It is factory-configured for 4.2 V (1-cell) or 8.4 V (2-cell) Li-ion/Li-polymer regulation only, selected via the CELLS pin. For LiFePO₄ (3.6 V/cell), Texas Instruments recommends the BQ24115RHLR, which features an externally programmable feedback (FB) pin supporting 2.1–15.5 V output range. The BQ24113RHLR lacks FB functionality and cannot be reconfigured for lower voltages.
How is battery temperature monitoring implemented on the BQ24113RHLR?
The BQ24113RHLR implements battery temperature monitoring using the TS pin referenced to the VTSB pin's 3.15-V regulated output. An NTC thermistor forms a voltage divider between VTSB and PGND, with the midpoint connected to TS. The IC compares this voltage against three internal thresholds - cold (LTF), hot (HTF), and cutoff (TCO) - each defined as a percentage of VTSB. Threshold hysteresis (0.5–1.5%) prevents oscillation, and deglitch time (20–40 ms) rejects transient noise. This analog method requires no host MCU involvement.
What is the purpose of the TTC pin on the BQ24113RHLR?
The TTC pin on the BQ24113RHLR sets the safety charge timer using an external capacitor. When charged through an internal current source, the capacitor voltage ramps until it reaches a threshold (~200 mV), triggering charge termination. With KTTC = 2.6 min/nF, a 0.01-μF capacitor yields ~25 minutes, while 0.18-μF yields ~572 minutes. This provides a critical backup to current-based termination - ensuring charge stops even if battery voltage fails to reach regulation or termination current isn't detected - enhancing safety in unattended charging scenarios.
Can the BQ24113RHLR operate without connecting the VTSB pin?
No, the VTSB pin must be connected with a 0.1–1-μF ceramic capacitor to VSS. VTSB is the dedicated 3.15-V bias regulator output powering the TS temperature-sense circuitry. Leaving VTSB unconnected disables temperature monitoring entirely, violating functional safety requirements for Li-ion charging. The capacitor stabilizes the regulator and filters noise; omitting it causes erratic TS readings and potential charge inhibition or unsafe operation. This requirement is explicitly specified in Section 7.5 of the BQ24113RHLR datasheet.
BQ24113RHLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- bqSWITCHER™
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1 ~ 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 8.4V
- Voltage - Supply (Max):
- 16V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (3.5x4.5)
BQ24113RHLR FAQ
1.How can I place an order for BQ24113RHLR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24113RHLR 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 BQ24113RHLR reliable?
The price and inventory of BQ24113RHLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24113RHLR is usually 5 days.
3.What payment methods are accepted for BQ24113RHLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24113RHLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24113RHLR?
BQ24113RHLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24113RHLR 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 BQ24113RHLR?
For technical support, including BQ24113RHLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24113RHLR requirements.
6.How does Aetrix verify that BQ24113RHLR is sourced from the original manufacturer or authorized distributors?
All BQ24113RHLR 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 BQ24113RHLR meets industry standards.
7.What is the process for return or replacement of BQ24113RHLR?
All BQ24113RHLR units undergo pre-shipment inspection (PSI). If there is an issue with BQ24113RHLR, 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 BQ24113RHLR part is unused and in its original packaging.
Return procedure for BQ24113RHLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24113RHLR Tags
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BQ21040DBVR
Texas Instruments
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