Texas Instruments BQ24030RHLRG4

Overview

BQ24030RHLRG4 from Texas Instruments is a single-chip Li-ion linear charger and system power-path management IC for space-constrained portable devices. It integrates AC adapter and USB input power selection, dynamic power-path management (DPPM), 4.2 V battery charge regulation, 3.3 V LDO output, and autonomous source switching between AC/USB/battery. It delivers up to 1.5 A battery charge current and supports power supplement mode in smartphones and PDAs.

For engineers reviewing the BQ24030RHLRG4 datasheet, BQ24030RHLRG4 pinout, BQ24030RHLRG4 application, or BQ24030RHLRG4 equivalent, key selection criteria include DPPM set-point configuration, ISET1-based current programming, PSEL-controlled source priority, thermal regulation behavior at 115°C, and compatibility with 3.5 mm × 4.5 mm QFN-20 layout constraints.

Technical Context

The BQ24030RHLRG4 implements integrated power FETs (Q1–Q3) for AC-to-OUT, USB-to-OUT, and BAT-to-OUT paths, enabling simultaneous system powering and battery charging. Its DPPM circuit monitors OUT voltage via the DPPM pin and scales internal regulation using a 1.15× scale factor to maintain ≥2.6 V output under load.

Charge control uses dual current-setting pins: ISET1 programs AC fast-charge current (100–1500 mA) and termination threshold, while ISET2 selects USB input limit (100 mA or 500 mA). The device enters thermal regulation at 115°C (Q2) and shuts down at 155°C (Q1/Q3), with deglitch timing of 22.5 ms across all fault comparators.

Key Specifications

Pinout & Package

VQFN-20 package with 3.5 mm × 4.5 mm body size and exposed thermal pad (VSS-connected). Pin 11 is the primary ground connection; thermal pad must be soldered to PCB ground plane using 2×3 via matrix for rated thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery charge and power-path management applications.

Compared with BQ24032ARHLR and BQ24035RHLR, the BQ24030RHLRG4 provides the highest system output voltage (6.3 V), making it optimal for legacy 5 V–6 V system rails, while retaining full DPPM, supplement mode, and thermal regulation features common to the bq2403x family.

Availability

BQ24030RHLRG4 is available at Aetrix Electronics and suitable for smartphone power management, USB-powered PDA designs, digital camera charging circuits, and internet appliance backup power systems requiring stable component supply and long-term lifecycle support.

Supply support for BQ24030RHLRG4 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 and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.

The bq2403x product line was designed specifically for space-constrained Li-ion/Li-polymer portable devices requiring integrated charging, power-path control, and system-level power management without external FETs or controllers.

FAQ

What is the battery charge voltage setting for BQ24030RHLRG4?

The BQ24030RHLRG4 has a fixed battery charge voltage of 4.2 V ±0.5%, optimized for standard single-cell Li-ion batteries. This value is factory-trimmed and non-adjustable-unlike the BQ24038 which supports 4.2 V/4.36 V selection via VBSEL. The 4.2 V regulation ensures safe full-charge termination without requiring external voltage dividers or configuration pins on the BQ24030RHLRG4.

How does BQ24030RHLRG4 handle simultaneous USB and AC input presence?

When both USB and AC inputs are present, the BQ24030RHLRG4 selects the source defined by the PSEL pin: High prioritizes AC, Low prioritizes USB. The unselected source remains idle but monitored. If the primary source fails, the device switches to the secondary source within 50 µs (tSW-AC/USB), maintaining uninterrupted system power. No arbitration or firmware intervention is needed-the BQ24030RHLRG4 handles this autonomously.

Can BQ24030RHLRG4 operate without an external timer resistor?

Yes-the BQ24030RHLRG4 can disable its fast-charge safety timer and charge termination by tying the TMR pin directly to the LDO pin (3.3 V). In this configuration, the internal 50 kΩ timer resistor replaces the external one, and timed functions (precharge, fast-charge, termination) are disabled. This mode is valid for applications where external supervision or fixed-charge profiles are used instead of autonomous termination.

What is the maximum continuous output current capability of BQ24030RHLRG4 on the OUT pin?

The BQ24030RHLRG4 supports up to 4 A continuous output current on the OUT pin, shared between system load and battery charging. This rating assumes proper PCB thermal design (exposed pad soldered with 2×3 via matrix) and ambient temperature ≤40°C. At higher temperatures, derating applies: 21 mW/°C above 40°C, based on θ_JA = 46.87°C/W and 1.81 W max power dissipation.

Does BQ24030RHLRG4 support battery temperature monitoring?

Yes-the BQ24030RHLRG4 includes a dedicated TS pin that connects to an NTC thermistor network. It monitors battery temperature using two comparator thresholds: VLTF (2.500 V ±35 mV) for overtemperature fault and VHTF (0.500 V ±15 mV) for undertemperature fault. A 100 µA current source (ITS) biases the thermistor, and deglitch timing is fixed at 22.5 ms to reject noise spikes without compromising safety response.