Texas Instruments BQ24250CYFFR

Overview

BQ24250CYFFR from Texas Instruments is a 2 A single-input I²C/standalone switch-mode Li-ion battery charger with integrated power-path management, 3 MHz synchronous PWM controller, and 4.9 V/50 mA LDO. It supports USB-compliant input current limits (100–2000 mA), programmable charge voltage (4.2 V), and dynamic power management (VIN_DPM) for portable smart phones and media players.

For engineers reviewing the BQ24250CYFFR datasheet, BQ24250CYFFR pinout, BQ24250CYFFR application, or BQ24250CYFFR equivalent, key selection considerations include its 2.4 × 2.0 mm DSBGA-30 package, resistor- and I²C-programmable charge parameters, thermal regulation at 125 °C, and dual-mode operation (I²C host vs. standalone resistor configuration).

Technical Context

The BQ24250CYFFR implements a synchronous buck converter with fixed 3 MHz switching frequency, enabling use of compact 1.0 µH inductors and minimizing EMI. Its power-path architecture decouples system load (SYS) from battery charging, allowing simultaneous charging and system operation-even with deeply discharged or absent batteries.

It features four-stage charging (trickle/pre-charge/constant-current/constant-voltage), voltage-based NTC monitoring via TS pin, and integrated protection including input OVP (20 V abs max), battery OVP (105% VBATREG), thermal shutdown (150 °C), and safety timer (45–32400 s). Charge parameters are configurable via external resistors (ISET, ILIM, VDPM) or I²C registers.

Key Specifications

Pinout & Package

Package: 30-ball DSBGA (YFF), 2.427 mm × 2.027 mm, 0.4 mm pitch, bottom-side thermal connection via PGND balls (A3/B3/C3/F3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Li-ion battery charger applications.

Compared with BQ24250CYFFR, BQ24251CYFFR offers incremental feature upgrades within identical mechanical constraints, while BQ24295RGER provides higher performance at the cost of layout redesign and loss of integrated LDO-making BQ24250CYFFR optimal for cost-sensitive, space-constrained USB-charged devices needing embedded bias regulation.

Availability

BQ24250CYFFR is available at Aetrix Electronics and suitable for smartphone power management, portable media player charging, handheld industrial scanner battery systems, and Bluetooth headset charging cases requiring stable component supply and long-term lifecycle support.

Supply support for BQ24250CYFFR 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 solutions, with decades of expertise in battery charging ICs for mobile and portable electronics.

The BQ24250CYFFR belongs to TI's bq242xx family of highly integrated Li-ion chargers designed specifically for ultra-thin, USB-powered consumer devices requiring robust power-path management and minimal external components.

FAQ

What is the maximum input voltage rating for the BQ24250CYFFR?

The BQ24250CYFFR has an absolute maximum input voltage rating of 20 V on the IN pin, but its recommended operating input voltage range is 4.35 V to 10.5 V. Exceeding 10.5 V may trigger input overvoltage protection (VOVP) or degrade long-term reliability, even if below the 20 V absolute limit. The BQ24250CYFFR is optimized for USB (5 V) and standard wall adapters.

Does the BQ24250CYFFR support charging from a dead battery (0 V)?

Yes, the BQ24250CYFFR implements the AnyBoot algorithm to detect and safely initiate trickle charge on batteries as low as 1.9 V (VBATSHRT threshold), and it can power the system (SYS) even with a completely absent or deeply discharged battery. This enables instant system turn-on without waiting for battery recovery-critical for consumer device user experience.

How does the power-path management work in the BQ24250CYFFR during high system load?

When system load exceeds available input current, the BQ24250CYFFR reduces battery charge current to maintain VSYSREG (3.52 V). If charge current reaches zero and load persists, it enters supplement mode-turning on the battery FET to source current from the battery into SYS. This seamless transition prevents system brownout and enables use of smaller adapters.

Can the BQ24250CYFFR be configured without I²C communication?

Yes, the BQ24250CYFFR operates fully in standalone mode using external resistors on ISET, ILIM, and VDPM pins to set charge current (300–2000 mA), input current limit (500–2000 mA), and VIN_DPM threshold (4.2–4.76 V). EN1/EN2 pins further enable USB-compliant current selection (100/150/500/900 mA) without I²C-ideal for cost-sensitive or resource-constrained designs.

What thermal protection mechanisms does the BQ24250CYFFR include?

The BQ24250CYFFR incorporates three thermal protections: (1) junction temperature regulation starting at 125 °C (reducing charge current), (2) thermal shutdown at 150 °C (halting all operation), and (3) thermal hysteresis of 10 °C for recovery. These operate independently of the TS pin, providing redundant safety for battery charging in enclosed or thermally constrained environments.