Texas Instruments BQ24165RGER

Overview

BQ24165RGER from Texas Instruments is a dual-input, switch-mode single-cell Li-ion battery charger IC with integrated power path management. It delivers up to 2.5A charge current from the IN input and 1.5A from USB, supports 6.5V USB OVP and 10.5V IN OVP, and maintains system regulation down to 3.5V-enabling instant system startup even with a deeply discharged or absent battery. It is used in space-constrained portable devices requiring GSM call support during charging.

For engineers reviewing the BQ24165RGER datasheet, BQ24165RGER pinout, BQ24165RGER application, or BQ24165RGER equivalent, key selection criteria include its QFN-24 package, JEITA-compatible charge parameter selection (CE1/CE2), absence of NTC monitoring, and precise 0.5% battery voltage regulation-critical for reliable battery safety and system runtime in handheld and portable internet devices.

Technical Context

The BQ24165RGER implements a fixed-frequency (1.5 MHz) voltage-mode PWM controller with internal compensation, enabling stable operation with low-ESR ceramic output capacitors. Its dual-input architecture fully isolates USB and IN paths, with IN taking precedence, and uses cycle-by-cycle current limiting (5 A peak) on both inputs.

Power path management operates via independent control of the battery FET and system FET: SYS is regulated to VBAT but clamped at ≥3.5 V, while supplemental mode allows battery current to assist system load when input current is insufficient-enabling use of smaller adapters without compromising peak system performance.

Key Specifications

Pinout & Package

Package: 4 mm × 4 mm, 24-pin QFN with exposed thermal pad (PGND-connected). Thermal pad must be soldered to PCB ground plane for proper thermal performance and electrical reference.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24165RGER, BQ24166RGER adds battery temperature sensing but removes JEITA programmability, while BQ24167RGER provides both temperature monitoring and JEITA support-making BQ24165RGER the optimal choice when cost-sensitive designs require JEITA flexibility without NTC hardware overhead.

Availability

BQ24165RGER is available at Aetrix Electronics and suitable for handheld products, portable media players, and netbook/portable internet devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for BQ24165RGER 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 and embedded processing solutions with emphasis on power management, signal chain, and connectivity technologies.

The BQ24165RGER belongs to TI's bq2416x family of highly integrated Li-ion battery chargers designed for space-constrained portable applications with high-capacity batteries and demanding power-path requirements.

FAQ

What is the maximum continuous input current supported by the BQ24165RGER on the IN pin?

The BQ24165RGER supports up to 2.5 A continuous input current on the IN pin, programmable via the ILIM resistor. Absolute maximum rating is 2.75 A, but recommended operating condition is 2.5 A to ensure thermal stability and long-term reliability under typical PCB layout conditions.

Does the BQ24165RGER support JEITA-compliant charging, and how is it configured?

Yes, the BQ24165RGER supports JEITA-compliant charging via CE1 and CE2 pins. When CE1 = 1 and CE2 = 0, it reduces charge voltage by 140 mV; when CE1 = CE2 = 0, it applies standard 4.2 V regulation. This binary configuration enables region-specific thermal charge profiles without external microcontroller intervention.

What is the purpose of the VDPM pin on the BQ24165RGER, and what voltage range can it be programmed to?

The VDPM pin on the BQ24165RGER sets the input voltage-based Dynamic Power Management threshold for the IN input. It accepts a resistor divider to program VINDPM from 4.2 V to 10 V, allowing the IC to throttle input current before the adapter voltage collapses-critical for maintaining stable operation with weak or unregulated supplies.

Can the BQ24165RGER operate without a battery connected, and what is the minimum system voltage it maintains?

Yes, the BQ24165RGER can power the system without a battery. It regulates SYS to ≥3.5 V (typical 3.7 V) using the internal power path, enabling instant system startup and sustained operation-even with a defective or missing battery pack.

What package type and thermal characteristics does the BQ24165RGER use, and how should the thermal pad be handled?

The BQ24165RGER uses a 4 mm × 4 mm QFN-24 package with exposed thermal pad. The pad is internally connected to PGND and must be soldered to a dedicated PCB copper pour tied to the main ground plane. Thermal resistance θJA is 32.6°C/W, requiring adequate copper area and vias for reliable operation at full 2.5 A charge current.