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Texas Instruments LP8727TMX-B/NOPB
- Part No.:
- LP8727TMX-B/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP8727TMX-B/NOPB.pdf
- Description:
- IC INTFACE SPECIALIZED 25DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
LP8727TMX-B/NOPB from Texas Instruments is a highly integrated micro/mini USB interface IC with 28V overvoltage-protected Li-ion charger, dual-path analog multiplexer (USB/UART/audio), and dual LDOs (ID detection + EXPDET). It delivers 400 mA charging current, supports high-speed USB 2.0 data switching, drives audio inputs to −2.0 V rail, and operates across −40°C to +125°C junction temperature in cellular handset power management systems.
For engineers reviewing the LP8727TMX-B/NOPB datasheet, LP8727TMX-B/NOPB pinout, LP8727TMX-B/NOPB application, or LP8727TMX-B/NOPB equivalent, key selection criteria include 28V OVP on VBUS, I²C-programmable switch routing (D+/D−/U1/U2/AUD1/AUD2), thermal-regulated linear charge control, negative-voltage audio support, and integrated SEND/END & microphone removal detection logic.
Technical Context
The LP8727TMX-B/NOPB integrates three functional domains: (1) A 28V-input overvoltage-protected linear charger with programmable 90–1000 mA full-rate current, pre-charge mode, CV/CC termination, and thermal regulation at 115°C; (2) A configurable analog multiplexer supporting USB 2.0 high-speed (480 Mbps), UART, stereo audio (±1.8 V swing), and microphone paths via I²C-controlled switch matrices; (3) Two independent LDOs - a 2.3/2.6 V ID-detection LDO (1 mA output) and a 4.85 V EXPDET LDO (50 mA, 330 mV dropout).
Switch operation relies on an internal charge pump (CP_EN) enabling negative rail drive for AUD1/AUD2, while DSS input sets default USB/UART routing at power-up. Detection logic includes VBUS/ID/SEND/END/MIC removal comparators with interrupt generation (INT\), all managed through an I²C slave address 0x27 interface with 14 registers including status, control, and configuration fields.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charging Input Voltage Range | VBUS = 3.5 V to 7 V; supports USB host, wall adapter, and dedicated chargers per USB IF rev 1.1. |
| Overvoltage Protection Threshold | 28 V on VBUS input; eliminates need for external OVP circuitry in portable designs. |
| Full-Rate Charging Current | Programmable up to 1000 mA; default 400 mA with ±5% tolerance ensures precise battery conditioning. |
| Audio Switch Analog Range | −2.0 V to +3.6 V when charge pump enabled; enables true bipolar audio signal handling without external biasing. |
| EXPDET LDO Output | 4.85 V @ 50 mA with 330 mV dropout; powers low-voltage USB transceivers or wakes PMUs upon VBUS connection. |
| Operating Junction Temperature | −40°C to +125°C; qualified for extended-temperature mobile handset environments. |
| I²C Slave Address | 7-bit address 0x27; enables multi-device bus integration with register-level control of charging, switching, and detection states. |
Pinout & Package
LP8727TMX-B/NOPB uses a 25-bump, 0.4 mm pitch thin DSBGA package (2.015 mm × 2.015 mm), optimized for space-constrained mobile phone PCB layouts. Thermal resistance θJA = 46°C/W under typical board conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AUD1 (B1) | Stereo audio input (left) | Analog input capable of −2.0 V to +3.6 V swing when CP_EN = 1; routed to Micro/Mini USB connector via I²C-configurable switch. |
| D+ (E2), D− (E3) | USB 2.0 differential data I/O | High-speed USB path terminals; support 480 Mbps signaling; default connection set by DSS pin at startup. |
| DP (A3), DN (A2) | USB differential data I/O (+/−) | Alternate USB data pins; used when D+ and D− are reassigned to UART or audio paths via SW control register. |
| U1 (A5), U2 (A4) | UART Rx/Tx I/O | Configurable UART path; shares physical routing with USB D−/D+; selected via DP2/DM1 bits in SW CONTROL register. |
| ID (E1) | USB ID detection input | Monitors accessory type (charger/headset); enables SEND/END button and MIC removal detection using internal comparators. |
| EXPDET (B5) | Overvoltage-protected LDO output | 4.85 V, 50 mA regulated supply; powers USB transceivers or wakes PMU; requires 1 µF ceramic capacitor to GND. |
| INT\ (B2) | Open-drain interrupt output | Active-low interrupt signaling VBUS detect, ID change, CHG_DET, OVLO, UVLO, or thermal shutdown events. |
| SCL/SDA (B4/B3) | I²C serial interface | Standard-mode I²C bus (≤400 kHz); pull-up resistors required (1.5 kΩ); enables full configuration and status readback. |
Key Features
| Feature | Design Value |
|---|---|
| 28 V overvoltage protection on VBUS | Eliminates external TVS diodes or OVP ICs, reducing BOM count and PCB area in USB-powered handhelds. |
| I²C-programmable USB/UART/audio routing | Enables dynamic path selection in response to accessory insertion-e.g., route D+/D− to USB for charging, U1/U2 to UART for debug, or AUD1/AUD2 for headset audio. |
| Negative-voltage audio support (−2.0 V) | Allows direct connection of AC-coupled stereo audio signals without external level-shifting or bias networks. |
| Integrated SEND/END and MIC removal detection | Reduces host processor polling load by generating hardware interrupts for headset button press or plug-unplug events. |
| Thermally regulated linear charging | Maintains optimal charge rate across ambient temperatures via internal thermal shutdown (115°C trip) and regulation loop. |
| Dual LDO architecture (ID + EXPDET) | Provides dedicated low-noise bias for ID detection (2.3/2.6 V) and system wake-up supply (4.85 V), decoupling critical functions. |
Applications
| Smartphone Charging & Accessory Detection | Headset Audio Interface Management |
|---|---|
Use Scenario: Detecting and routing between USB charging, UART debugging, and 3.5 mm headset accessories in GSM/GPRS/EDGE/WCDMA handsets. IC Role / Device Role / Timing Role: Central USB interface manager performing automatic ID detection, switch path selection, and charger state reporting via I²C. Use Value: Enables single USB port to serve multiple roles without mechanical switches or external logic, reducing bill-of-materials and board complexity. |
Use Scenario: Supporting stereo audio playback, microphone input, and SEND/END button functionality through a shared micro-USB port in portable media players. IC Role / Device Role / Timing Role: Audio path controller providing rail-to-rail analog switching, MIC bias generation, and push-button event detection with sub-100 µs response. Use Value: Delivers true headset compatibility-including microphone removal alerts and button press interrupts-without requiring host-side ADC or GPIO monitoring. |
| USB Transceiver Power Management | Production Test Mode Support |
Use Scenario: Powering and enabling low-voltage USB transceivers only when VBUS is present in battery-powered embedded devices. IC Role / Device Role / Timing Role: EXPDET LDO acts as a controlled enable rail, delivering 4.85 V at 50 mA with fast turn-on and 75 dB PSRR for noise-sensitive PHYs. Use Value: Prevents transceiver leakage and idle current draw during battery-only operation, extending standby time in always-connected devices. |
Use Scenario: Enabling high-current production test mode for rapid battery charging validation during manufacturing. IC Role / Device Role / Timing Role: PTM bit (CONTROL1 register) activates high-current mode, bypassing normal charge safety timers and voltage thresholds. Use Value: Reduces final-test cycle time by allowing full-rate charging without waiting for CV/EOC transitions or thermal cooldown periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB interface and battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24072RGTR | Standalone 500 mA USB charger only; no multiplexer, no audio support, no ID/SENSE detection. | Used where USB charging is needed but accessory detection and analog switching are handled externally. | Select when system already implements discrete USB switch and headset detection logic; reduces cost if LP8727TMX-B/NOPB's integration is unnecessary. |
| TUSB1210IRHBR | Dedicated USB 2.0 high-speed transceiver with integrated USB PHY; no charger, no LDOs, no analog switches. | Applied in host/device USB connectivity where power delivery and analog path management are separate subsystems. | Choose when USB data integrity and ESD robustness are primary concerns, and charging/muxing are delegated to other ICs. |
Compared with BQ24072RGTR and TUSB1210IRHBR, LP8727TMX-B/NOPB uniquely combines USB charging, analog multiplexing, and intelligent accessory detection in one die-reducing component count and interconnect complexity in space-constrained mobile platforms where feature consolidation is critical.
Availability
LP8727TMX-B/NOPB is available at Aetrix Electronics and suitable for smartphone accessory detection, portable media player audio routing, USB transceiver power sequencing, production test automation, and thermally constrained mobile power management requiring stable component supply and long-term lifecycle support.
Supply support for LP8727TMX-B/NOPB 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 experience in mobile and portable electronics solutions.
The LP8727TMX-B/NOPB belongs to TI's Power Management Unit (PMU) product line, designed specifically for integration into cellular handsets and portable media devices requiring consolidated USB interface, battery charging, and intelligent accessory detection capabilities.
FAQ
What is the maximum input voltage the LP8727TMX-B/NOPB can tolerate on its VBUS pin?
The LP8727TMX-B/NOPB features integrated 28 V overvoltage protection on the VBUS pin, meaning it safely withstands transient inputs up to +28 V relative to GND without damage or latch-up. This eliminates the need for external OVP components in designs powered from unregulated adapters or automotive USB ports. The device remains fully functional within its operating range of 3.5 V to 7 V, and the 28 V rating is an absolute maximum stress limit-not an operational condition.
How does the LP8727TMX-B/NOPB handle microphone removal and SEND/END button detection?
The LP8727TMX-B/NOPB monitors the ID pin voltage using internal comparators: microphone removal triggers when ID voltage rises above 90% of the RES bias voltage (~2.07 V for 2.3 V LDO), and SEND/END press triggers when ID drops below 10% (~0.23 V). Both events generate interrupts via INT\ and are reported in INT_STAT1 register bits. These functions require SEMREN = 1 and proper external 2.2 kΩ resistor between RES and ID pins, and operate independently of USB data routing.
Can the LP8727TMX-B/NOPB support negative-voltage audio signals without external components?
Yes-the LP8727TMX-B/NOPB supports true negative-voltage audio inputs (down to −2.0 V) on AUD1 and AUD2 pins when the internal charge pump is enabled (CP_EN = 1 in CONTROL1 register). This capability allows direct connection of AC-coupled headset audio signals without external DC bias networks or level shifters, preserving signal integrity and simplifying front-end design in portable media players and smartphones.
What is the role of the DSS pin on the LP8727TMX-B/NOPB, and how is it used at startup?
The DSS pin determines default switch routing at power-up: logic low (GND or floating) selects USB path (D+→DP, D−→DN), while logic high (pulled to VBAT via 300 kΩ) selects UART path (D+→U2, D−→U1). Its state is latched on the first rising edge of SCL, making it a hardware-configurable boot option that avoids I²C initialization dependency. Once latched, routing remains fixed until modified via SW CONTROL register writes.
Does the LP8727TMX-B/NOPB include thermal protection, and how does it behave during charging?
Yes-the LP8727TMX-B/NOPB incorporates thermal regulation with two-tier protection: (1) Dynamic thermal regulation adjusts charge current to maintain safe junction temperature; (2) Hard thermal shutdown engages at 115°C (typ.) and releases at 130°C. During high-ambient or high-power operation, this prevents permanent damage and ensures reliable charging performance without external thermal sensors or firmware intervention.
LP8727TMX-B/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 25-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- MP3 Players, Portable Media Players
- Interface:
- Micro-USB
- Voltage - Supply:
- -
- Supplier Device Package:
- 25-DSBGA
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LP8727TMX-B/NOPB FAQ
1.How can I place an order for LP8727TMX-B/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8727TMX-B/NOPB 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 LP8727TMX-B/NOPB reliable?
The price and inventory of LP8727TMX-B/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8727TMX-B/NOPB is usually 5 days.
3.What payment methods are accepted for LP8727TMX-B/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8727TMX-B/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8727TMX-B/NOPB?
LP8727TMX-B/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8727TMX-B/NOPB 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 LP8727TMX-B/NOPB?
For technical support, including LP8727TMX-B/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8727TMX-B/NOPB requirements.
6.How does Aetrix verify that LP8727TMX-B/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8727TMX-B/NOPB 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 LP8727TMX-B/NOPB meets industry standards.
7.What is the process for return or replacement of LP8727TMX-B/NOPB?
All LP8727TMX-B/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8727TMX-B/NOPB, 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 LP8727TMX-B/NOPB part is unused and in its original packaging.
Return procedure for LP8727TMX-B/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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