Texas Instruments BQ24014DRCRG4

Overview

BQ24014DRCRG4 from Texas Instruments is a single-chip Li-ion linear charge management IC for space-constrained handheld devices, featuring integrated power FET, ±0.5% voltage regulation accuracy at 4.2 V, up to 1-A charge current, reverse leakage protection, and battery insertion/removal detection. It operates in conditioning, constant-current, and constant-voltage phases with minimum-current termination and dual safety timers.

For engineers reviewing the BQ24014DRCRG4 datasheet, BQ24014DRCRG4 pinout, BQ24014DRCRG4 application, or BQ24014DRCRG4 equivalent, key selection considerations include its 3-mm × 3-mm DRC (QFN-10) package, CE/TTE/TS pin support for system-level control, thermal shutdown at 155°C, and compatibility with regulated/unregulated DC inputs up to 16.5 V.

Technical Context

The BQ24014DRCRG4 implements a three-phase charging algorithm-pre-charge (10–100 mA), constant-current (programmable up to 1 A via ISET resistor), and constant-voltage (4.2 V ±0.5%)-with automatic recharge when battery voltage drops below VO(REG) – 0.1 V. Charge termination occurs via either minimum-current detection (I(TERM) = K(SET) × V(TERM)/R(SET)) or backup timer (t(CHG) = 20.65 s).

It integrates open-collector STAT1/STAT2 status outputs, PG (power-good) indicator, CE (active-low charge enable), TTE (timer/termination enable), and TS (temperature sense) input supporting NTC-based hot/cold battery qualification using ratiometric V(TS1) = 30%VCC and V(TS2) = 61%VCC thresholds. Thermal shutdown suspends charging above 155°C and resumes at ~130°C.

Key Specifications

Pinout & Package

The BQ24014DRCRG4 uses a thermally enhanced 10-pin DRC (QFN) package with an exposed thermal pad electrically connected to VSS. The pad must be soldered to a PCB ground plane using a 2×3 via matrix for optimal thermal performance (θ_JA = 47°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Li-ion linear charge management applications.

Compared with BQ24014DRCRG4, BQ24013DRCRG4 removes thermal qualification but retains full charging functionality, while BQ24018DRCRG4 shifts regulation to 4.36 V-making each alternative suitable only for specific chemistry or safety requirements, not drop-in replacements.

Availability

BQ24014DRCRG4 is available at Aetrix Electronics and suitable for smartphone charging circuits, USB-powered media players, digital camera power management, and industrial handheld scanners requiring stable component supply across production lifecycles.

Supply support for BQ24014DRCRG4 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The bqTINY™ series-including BQ24014DRCRG4-is designed specifically for space-constrained portable electronics requiring highly integrated, low-quiescent-current Li-ion/Li-Pol charge management with minimal external components.

FAQ

What is the recommended input voltage range for reliable operation of the BQ24014DRCRG4?

The BQ24014DRCRG4 operates reliably with input voltages from 3 V to 16.5 V. Inputs between UVLO threshold and 4.35 V may result in degraded performance, including reduced regulation accuracy or incomplete feature activation. For guaranteed full functionality-including 4.2 V regulation, 1-A current capability, and TS-based thermal qualification-the input must remain ≥4.5 V per TI's recommended operating conditions. The IN and VCC pins must be tied together externally.

How does the BQ24014DRCRG4 implement battery temperature qualification?

The BQ24014DRCRG4 uses its TS pin to monitor battery temperature via an external NTC thermistor divider. It compares the resulting voltage against ratiometric thresholds: V(TS1) = 30%VCC (cold limit) and V(TS2) = 61%VCC (hot limit). If the TS voltage falls outside this window, the IC immediately suspends charging without resetting timers. Charge resumes automatically once temperature returns to the valid range. This behavior is confirmed in the SLUS530K datasheet Section "TEMPERATURE QUALIFICATION".

Can the BQ24014DRCRG4 be used with a USB 2.0 port as the sole power source?

Yes, the BQ24014DRCRG4 supports USB 2.0 (5 V, 500 mA) as a valid input source. Its input range (3–16.5 V) and ability to regulate down to 4.2 V with up to 1 A make it compatible with USB power. However, maximum charge current is limited by USB current capability and thermal design. The PG output confirms VBUS presence, and CE allows host microcontroller coordination. Application diagram Figure 4 in SLUS530K explicitly shows USB port integration with BQ24013/BQ24018 variants, confirming architectural compatibility for BQ24014DRCRG4.

What happens to the BQ24014DRCRG4 when the input supply (VCC) is removed?

When VCC is removed, the BQ24014DRCRG4 enters low-power sleep mode, drawing only 5 μA total current (ICC(SLP)). In this state, STAT1, STAT2, and PG outputs go high-impedance (OFF), and all charging functions halt. Battery reverse leakage is blocked by internal protection, preventing discharge into the input rail. The device remains ready to resume charging immediately upon VCC reapplication, with no reset or initialization delay required.

How is charge current programmed on the BQ24014DRCRG4?

Charge current is programmed using an external resistor (R_SET) between the ISET pin and VSS. The nominal output current is calculated as I_O(OUT) = K(SET) × V(SET)/R(SET), where V(SET) = 2.50 V (typical) and K(SET) = 355 (typical for 100–1000 mA range). For example, a 2.5 kΩ resistor yields ~355 mA. Pre-charge, taper, and termination currents scale proportionally using the same R_SET, as defined in Equations (1), (4), (5), and (6) of the SLUS530K datasheet.