Texas Instruments BQ51052BYFPR

Overview

BQ51052BYFPR from Texas Instruments is a Qi v1.2-compliant wireless power receiver IC integrating synchronous rectification, battery charge control, and digital communication for Li-ion/Li-polymer batteries. It delivers 4.40 V regulated output, supports up to 1.0 A charging current, achieves 93% peak AC-DC efficiency, and implements modified JEITA temperature regulation - used in compact smartphones and portable media players requiring single-stage wireless charging.

For engineers reviewing the BQ51052BYFPR datasheet, BQ51052BYFPR pinout, BQ51052BYFPR application, or BQ51052BYFPR equivalent, key selection criteria include its 4.40-V battery regulation, ILIM-programmable 500–1000 mA charge current, VQFN-20 package with exposed thermal pad, and integrated FOD/NTC/communication modulation for WPC-compliant systems.

Technical Context

The BQ51052BYFPR implements a single-stage architecture combining AC-to-DC conversion via low-R_DS(on) (100 mΩ typical) N-MOSFET synchronous rectifier and LDO-based battery regulation. Its digital controller executes Qi v1.2 packet-based communication using capacitive load modulation on COMM1/COMM2 pins and monitors received power via FOD input.

It features dual-mode thermal management: analog NTC sensing through TS/CTRL pin with programmable JEITA thresholds (V45C = 18–21% V_TSB, V60C = 12–14% V_TSB) and digital junction shutdown at 155°C. Output voltage tracking (V_RECT = V_BAT + 300 mV) ensures high efficiency across full charge cycle.

Key Specifications

Pinout & Package

VQFN-20 package with exposed thermal pad (must be connected to PGND). 4.50 mm × 3.50 mm body size, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wireless power receiver applications.

Compared with BQ51052BYFPR, BQ51051BYFPR offers higher current capability but less thermal adaptability, while MP-A21 reduces integration at the cost of added external components and reduced temperature safety granularity.

Availability

BQ51052BYFPR is available at Aetrix Electronics and suitable for smartphones, wireless earbuds, and portable media players requiring stable component supply, WPC v1.2 certification, and 4.40-V Li-ion battery charging.

Supply support for BQ51052BYFPR 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, embedded processing, and wireless technologies, with leadership in power management and connectivity solutions.

The BQ51052BYFPR belongs to TI's Qi-compliant wireless power receiver family, designed specifically for space-constrained portable devices needing integrated AC-DC conversion, battery charging, and WPC v1.2 communication in a single chip.

FAQ

What is the regulated battery output voltage of the BQ51052BYFPR?

The BQ51052BYFPR provides a precise 4.40 V ±20 mV regulated output voltage for Li-ion/Li-polymer batteries. This value is factory-trimmed and maintained across load (0–1000 mA), temperature (0–125°C), and input voltage (4–10 V at RECT), enabling use with higher-energy-density 4.40-V battery chemistries. The BQ51052BYFPR does not support user-selectable voltage options - this is fixed per device variant.

How is battery charge current programmed on the BQ51052BYFPR?

Battery charge current on the BQ51052BYFPR is set via an external resistor (R_ILIM) connected between the ILIM pin and PGND. Using the formula I_BULK = K_ILIM/R_ILIM, where K_ILIM = 303–321 AΩ for this variant, a 303-kΩ resistor yields ~1000 mA, and a 606-kΩ resistor yields ~500 mA. The BQ51052BYFPR supports only the 500–1000 mA range, unlike the 500–1500 mA range of BQ51050B/BQ51051B.

Does the BQ51052BYFPR support temperature monitoring with an NTC thermistor?

Yes, the BQ51052BYFPR supports NTC-based temperature monitoring via the TS/CTRL pin using a standard 10-kΩ, Beta = 3380 thermistor. Internal circuitry provides a 18–22 kΩ pullup and periodic 2.2-V bias (V_TSB) to enable accurate measurement of V_TS thresholds corresponding to 0°C, 10°C, 45°C, and 60°C. The BQ51052BYFPR implements a modified JEITA profile that reduces V_BAT to 4.20 V above 45°C.

What package type and thermal requirements apply to the BQ51052BYFPR?

The BQ51052BYFPR is offered exclusively in the VQFN-20 (RHL) package: 4.50 mm × 3.50 mm, 0.5-mm pitch, with an exposed thermal pad. This pad must be soldered to a PGND copper plane to achieve the specified R_θJA of 37.7°C/W. Failure to connect the thermal pad degrades thermal performance significantly and may trigger premature thermal shutdown during 1-A charging.

How does the BQ51052BYFPR ensure compliance with WPC Qi v1.2 standards?

The BQ51052BYFPR ensures WPC Qi v1.2 compliance through integrated digital control that handles packet-based communication (via COMM1/COMM2 load modulation), foreign object detection (FOD input monitoring), power regulation feedback, and end-power-transfer signaling (via TS/CTRL pin logic levels). It meets all mandatory electrical, timing, and protocol requirements defined in the Qi v1.2 specification without requiring external firmware or host processor intervention.