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Texas Instruments TPS65811RTQR
- Part No.:
- TPS65811RTQR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS65811RTQR.pdf
- Description:
- IC BATT MFUNC LI-ION 1CELL 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,442
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Product details
Overview
TPS65811RTQR from Texas Instruments is a single-cell Li-ion battery and power management IC integrating charge management, nine LDOs, two 750-mA buck converters, RGB/white LED drivers, GPIOs, ADC, and I²C system control in an 8-mm × 8-mm QFN-56 package. It delivers regulated system power (OUT), battery charging up to 1.5 A, and real-time thermal/fault monitoring for portable handheld devices.
For engineers reviewing the TPS65811RTQR datasheet, TPS65811RTQR pinout, TPS65811RTQR application, or TPS65811RTQR equivalent, this device supports I²C-programmable voltage sequencing, dynamic power path management (DPPM), battery temperature sensing via TS pin, and hardware reset with HOT_RST-critical for PDA, smartphone, and internet appliance power architecture validation.
Technical Context
The TPS65811RTQR implements dual-input power-path arbitration between AC and USB sources with automatic switchover, programmable current limiting (up to 2.75 A), and overvoltage protection (6.5 V). Its DPPM loop regulates OUT voltage by dynamically throttling charge current when input supply is insufficient, preventing system brownout during high-load battery charging.
It integrates an 8-channel 10-bit ADC with peak-detection and averaging modes, three programmable GPIOs supporting SM1/SM2 enable or ADC trigger functions, and a dedicated thermal shutdown circuit activating at 165°C with 30°C hysteresis-enabling robust fault handling without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Converter Output Current | 750 mA per channel (SM1/SM2); enables powering core logic rails in space-constrained PDAs |
| Charge Current Range | 100–1500 mA; supports fast-charge profiles for single-cell Li-ion with ISET1 resistor programming |
| Integrated LDO Count | 9 LDOs: 6 adjustable (1.25–3.3 V), 2 fixed 3.3-V, 1 RTC backup (1.5 V, low-leakage) |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz); allows full register access for voltage, timing, and fault mask configuration |
| Thermal Shutdown Threshold | 165°C activation with 30°C hysteresis; prevents permanent damage during sustained high-power operation |
| Package | QFN-56 (8 mm × 8 mm, exposed thermal pad); requires AGND1-connected thermal pad for 4.9°C/W junction-to-board thermal resistance |
| Operating Temperature | –40°C to +85°C ambient; validated for industrial-grade handheld device deployment |
Pinout & Package
TPS65811RTQR uses a thermally enhanced 56-pin QFN package (RTQ) with an exposed ground pad soldered to AGND1. The package measures 8.00 mm × 8.00 mm and requires strict PCB layout adherence to thermal and analog/power ground separation rules per TI SLVS658C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC | AC adapter input | Accepts 4.35–16.5 V DC; triggers power-path selection and enables 2.75-A input current limit |
| USB | USB port input | Accepts 4.35–16.5 V DC; supports programmable 100/400/2750 mA current limits via I²C |
| BAT | Battery connection | Direct Li-ion cell interface with thermal foldback, recharge detection, and safety timer (TMR pin) |
| OUT | Main system power rail | Regulated output (4.6–4.7 V) with power-good monitoring; supplies downstream LDOs and buck converters |
| SM1 / SM2 | Buck converter feedback | Voltage sense inputs for 750-mA synchronous buck regulators; require external LC filters |
| FB3 | White LED current set | Analog input setting LED peak current via external resistor; used with SM3SW for constant-current drive |
| ISET1 | Charge current programming | Analog input setting fast-charge/precharge/termination thresholds via external resistor to AGND1 |
| TS | Battery temperature sense | Current-source output for thermistor-based pack temperature monitoring; enables thermal foldback |
| SCLK / SDAT | I²C interface | Open-drain clock/data lines with 2-kΩ pullups to OUT; support host-controlled configuration and status readback |
| HOT_RST | Hardware reset input | Active-low pushbutton interface; initiates system reset independent of I²C or software state |
| INT | Interrupt output | Open-drain signal indicating fault events (OV, UV, thermal, charge termination); requires external pullup |
| RESPWRON | System reset output | Open-drain reset pulse (duration set by TRSTPWON capacitor); asserts on POR or HOT_RST |
| GPIO1–GPIO3 | Programmable I/O | Configurable as SM1/SM2 enables, ADC trigger, or general-purpose outputs; default SM1/SM2 control at power-up |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input power path with DPPM | Prevents system brownout by dynamically reducing charge current when input supply cannot sustain both system load and charging |
| Integrated 8-channel 10-bit ADC | Monitors battery voltage, temperature (TS), ANLG1/ANLG2 auxiliary inputs, and supply voltages with peak-detection mode for transient capture |
| RGB + white LED drivers | Three open-drain PWM outputs (RED/GREEN/BLUE) plus constant-current white LED driver (FB3/SM3SW) supporting up to 6-series LEDs |
| Programmable charge safety timer | TMR pin sets timeout value (via external RC) to terminate charge if voltage regulation is not achieved-preventing overcharge |
| Low-quiescent sleep mode | 400 μA BAT current in sleep mode extends battery shelf life during storage or standby without host wake-up |
| Hardware fault protection suite | Includes overvoltage (6.5 V), undervoltage lockout (2.5 V), thermal shutdown (165°C), and short-circuit recovery (500 Ω pullups) |
Applications
| PDA Power Management | Smartphone Baseband Supply |
|---|---|
Use Scenario: Powering ARM-based PDA SoC with multiple voltage rails, backlight, and battery telemetry. IC Role / Device Role / Timing Role: Central power management unit managing AC/USB/BAT arbitration, generating 1.2–3.3 V LDO outputs, and driving RGB status LEDs. Use Value: Reduces board area by 70% vs discrete PMIC solutions while enabling I²C-configurable sequencing for multi-rail SoC boot. |
Use Scenario: Delivering stable core, I/O, and RF supply voltages in GSM/UMTS smartphones with thermal-aware charging. IC Role / Device Role / Timing Role: System power controller providing OUT rail, battery charge management with thermal foldback, and ADC-monitored pack temperature. Use Value: Enables safe 1.5-A fast charging under varying ambient conditions via TS pin feedback and DPPM voltage regulation. |
| Internet Appliance System Rail | MP3 Player Power Architecture |
Use Scenario: Supporting always-on Wi-Fi connectivity, LCD display, and audio codec in compact internet radios. IC Role / Device Role / Timing Role: Integrated power hub supplying LDOs for audio DAC, Wi-Fi module, and display bias, plus white LED backlight driver. Use Value: Eliminates need for external LED driver IC and discrete LDOs-reducing BOM count and PCB layer count. |
Use Scenario: Managing battery life, headphone amp supply, and OLED display power in portable music players. IC Role / Device Role / Timing Role: Battery charger with precharge/fast-charge/termination states, LDO_PM for analog audio, and PWM-driven keyboard backlight. Use Value: Extends playback time via 400 μA sleep-mode quiescent current and adaptive charge current scaling based on battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65810RTQR | Same pinout and feature set but 600-mA buck output current (vs 750 mA for TPS65811RTQR); identical LDO count and I²C register map | Lower power systems where 600-mA SM1/SM2 output suffices; not suitable for designs requiring >600 mA per buck rail | Select TPS65810RTQR only if system load per buck rail remains ≤600 mA and cost optimization is prioritized |
| BQ24150ARHLT | Standalone Li-ion charger IC (no integrated LDOs/bucks); supports 1.5-A charge but lacks system power regulation or LED drivers | Requires external LDOs, bucks, and LED drivers-increasing BOM and layout complexity versus TPS65811RTQR's integration | Choose BQ24150ARHLT only when existing system already provides regulated rails and needs only battery charge management |
Compared with TPS65811RTQR, TPS65810RTQR offers identical functionality at reduced buck current, while BQ24150ARHLT provides focused charging capability without system power integration-making TPS65811RTQR optimal for space-constrained, fully integrated handheld power architectures.
Availability
TPS65811RTQR is available at Aetrix Electronics and suitable for PDA, smartphone, and internet appliance designs requiring stable component supply, long-lifecycle support, and production-ready power management integration.
Supply support for TPS65811RTQR 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 decades of battery and portable power expertise.
The TPS6581x product line was designed specifically for handheld devices requiring high-integration power management-including Li-ion charge control, multi-rail regulation, LED driving, and system monitoring in minimal PCB area.
FAQ
What is the maximum supported charge current for TPS65811RTQR?
The TPS65811RTQR supports a maximum fast-charge current of 1500 mA, programmable via the ISET1 pin using an external resistor to AGND1. This value is confirmed in Section 7.7 of the SLVS658C datasheet under "FAST CHARGE CURRENT" with typical operation at 25°C and V(OUT) > V(BAT) + 0.1 V. The TPS65811RTQR maintains this rating across its –40°C to +85°C operating range when thermal design meets RθJB = 4.9°C/W.
Does TPS65811RTQR support both AC adapter and USB charging simultaneously?
No, the TPS65811RTQR implements priority-based input selection-not simultaneous sourcing. When both AC and USB are present, AC takes precedence. The device automatically switches to USB if AC is removed, and to battery if both inputs are absent. This behavior is governed by internal voltage detection thresholds (VIN(DT) = 190 mV) and is detailed in Section 7.6 "Power Path Input Current Limit" of the SLVS658C datasheet.
How is thermal protection implemented in TPS65811RTQR?
The TPS65811RTQR features hardware-based thermal shutdown activating at 165°C (TSHUT) with 30°C hysteresis (THYS(SHUT)), ensuring the device powers down before junction temperature exceeds 125°C functional limit. Recovery requires junction cooling below 135°C. This protection operates independently of I²C control and is documented in Section 7.5 "Thermal Fault" of SLVS658C.
Can TPS65811RTQR drive white LEDs directly?
Yes, the TPS65811RTQR integrates a constant-current white LED driver using FB3 (current-set input) and SM3SW (switch node). It supports up to 6-series white LEDs with programmable peak current via external resistor on FB3 and overvoltage protection up to 28 V on SM3. This capability is specified in Section 1 "Features" and Figure 51 of the SLVS658C datasheet.
What is the role of the DPPM function in TPS65811RTQR?
DPPM (Dynamic Power Path Management) in the TPS65811RTQR regulates the OUT rail voltage by dynamically reducing battery charge current when input supply (AC/USB) cannot simultaneously sustain system load and charging. This prevents system brownout-ensuring uninterrupted operation even under marginal input conditions. The function is active by default and detailed in Section 7.6 "DPPM FUNCTION" of SLVS658C.
TPS65811RTQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- Over Current, Over Voltage
- Interface:
- I2C, USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-QFN (8x8)
TPS65811RTQR FAQ
1.How can I place an order for TPS65811RTQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65811RTQR 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 TPS65811RTQR reliable?
The price and inventory of TPS65811RTQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65811RTQR is usually 5 days.
3.What payment methods are accepted for TPS65811RTQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65811RTQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65811RTQR?
TPS65811RTQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65811RTQR 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 TPS65811RTQR?
For technical support, including TPS65811RTQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65811RTQR requirements.
6.How does Aetrix verify that TPS65811RTQR is sourced from the original manufacturer or authorized distributors?
All TPS65811RTQR 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 TPS65811RTQR meets industry standards.
7.What is the process for return or replacement of TPS65811RTQR?
All TPS65811RTQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65811RTQR, 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 TPS65811RTQR part is unused and in its original packaging.
Return procedure for TPS65811RTQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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