Texas Instruments BQ24230RGTRG4

Overview

BQ24230RGTRG4 from Texas Instruments is a USB-friendly lithium-ion linear battery charger with integrated dynamic power-path management (DPPM), supporting 25–500 mA programmable charge current, 4.20 V ±30 mV battery regulation, and 6.6 V input overvoltage protection. It powers portable systems while charging batteries independently-enabling instant system turn-on even with deeply discharged batteries.

For engineers reviewing the BQ24230RGTRG4 datasheet, BQ24230RGTRG4 pinout, BQ24230RGTRG4 application, or BQ24230RGTRG4 equivalent, key selection criteria include USB-IF-compliant 100/500 mA input current modes, thermal and short-circuit protection, NTC-based battery temperature monitoring, and programmable safety timers for precharge and fast-charge phases.

Technical Context

The BQ24230RGTRG4 implements VIN-DPM to prevent collapse of weak USB sources by dynamically reducing input current when input voltage drops below 4.35–4.63 V, and DPPM to maintain system output voltage at 4.4 V ±100 mV while independently regulating charge current up to 500 mA. Its power-path architecture allows battery supplementation during peak system load, eliminating need for oversized adapters.

It uses external resistors to configure critical functions: ILIM sets input current limit (200–500 mA), ISET programs fast-charge current (25–500 mA), TMR configures precharge/fast-charge timers (36–60 s/kΩ), and TS interfaces a 10-kΩ NTC thermistor for ±3°C hysteresis temperature monitoring across 0–50°C charging range.

Key Specifications

Pinout & Package

Package: 3 mm × 3 mm VQFN-16 with exposed thermal pad electrically tied to VSS; requires PCB thermal pad connection to ground plane for reliable thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar lithium-ion linear charger with power-path management applications.

Compared with BQ24230RGTRG4, BQ24232RGTR adds termination current programming for battery aging adaptation, while BQ24075RGTR omits VIN-DPM and ILIM programming-making it unsuitable for unregulated adapter use or dynamic source protection.

Availability

BQ24230RGTRG4 is available at Aetrix Electronics and suitable for Bluetooth headsets, portable medical sensors, USB-powered POS terminals, smart remote controls, and low-power handheld devices requiring stable component supply across production lifecycles.

Supply support for BQ24230RGTRG4 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 expertise in battery charging ICs for portable electronics.

The bq2423x product line was designed specifically for space-constrained USB-charged Li-ion applications-integrating power-path management, USB compliance, and thermal safety into a single 3 mm × 3 mm package.

FAQ

What is the maximum input voltage the BQ24230RGTRG4 can withstand without damage?

The BQ24230RGTRG4 has an absolute maximum input voltage rating of 28 V on the IN pin. While operation is suspended above 6.6 V due to overvoltage protection, the device remains undamaged up to 28 V-enabling robust handling of transient surges from unregulated wall adapters. This 28 V rating is confirmed in Section 7.1 Absolute Maximum Ratings of the SLUS821J datasheet.

How does the BQ24230RGTRG4 handle charging when the system load exceeds the input source capability?

The BQ24230RGTRG4 uses Dynamic Power-Path Management (DPPM) to seamlessly supplement system current from the battery when input current is insufficient. When the OUT voltage drops to VO(REG) – 100 mV, the IC reduces charge current to prioritize system power-allowing combined battery + adapter delivery without system brownout. This behavior is detailed in Section 3 Description and Figure 1 functional block diagram.

Can the BQ24230RGTRG4 be used with a 9-V wall adapter?

No-the BQ24230RGTRG4 is rated for 6.6 V input overvoltage protection and specifies 4.35–6.4 V operating range. A 9-V adapter exceeds its safe operating voltage and will trigger permanent OVP shutdown. For 9-V input, the pin-compatible BQ24232RGTR (10.5 V OVP) must be used instead, as shown in the Device Comparison Table (Section 5) of the datasheet.

What is the purpose of the TD pin on the BQ24230RGTRG4, and how should it be configured?

The TD (Termination Disable) pin on the BQ24230RGTRG4 disables charge termination when pulled high; it is internally pulled down to VSS and must not be left floating. When TD is high, charging continues indefinitely after reaching regulation voltage-intended only for specialized maintenance or trickle-charge applications. Default operation (termination enabled) requires TD connected to VSS, as specified in Pin Functions (Section 6).

Does the BQ24230RGTRG4 support battery temperature monitoring, and what NTC thermistor is required?

Yes-the BQ24230RGTRG4 integrates a precision NTC bias current source (75 μA) and comparator circuit for battery temperature monitoring. It is calibrated for a 10-kΩ Vishay Type 2 NTC thermistor, with factory-set 0°C and 50°C trip points and 3°C hysteresis. The TS pin must be connected directly to the thermistor; leaving it unconnected disables monitoring and may cause unsafe charging, per Section 6 Pin Functions.