Texas Instruments BQ24064DRCR

Overview

BQ24064DRCR from Texas Instruments is a single-chip Li-ion/Li-polymer linear charge management IC with thermal regulation, 4.2 V regulated output voltage, ±0.5% voltage accuracy, 1-A maximum charge current, and 10.5 V input overvoltage protection. It integrates power FET, current sensing, reverse leakage protection, and status outputs for portable battery-powered devices such as MP3 players and digital cameras.

For engineers reviewing the BQ24064DRCR datasheet, BQ24064DRCR pinout, BQ24064DRCR application, or BQ24064DRCR equivalent, key selection considerations include its 10-pin DRC (3×3 mm MLP) package, programmable charge current via ISET resistor, thermal regulation limit at 112°C, and compatibility with battery absent detection and input power status signaling.

Technical Context

The BQ24064DRCR implements a three-phase charging algorithm-preconditioning (10% fast-charge current), constant-current, and constant-voltage-with termination by minimum current and safety timer. Its thermal regulation loop dynamically reduces charge current when junction temperature exceeds 112°C to prevent overheating without halting operation.

It features integrated input overvoltage protection (10.5 V threshold), reverse leakage prevention, automatic sleep mode (100 µA quiescent current), and open-collector STAT1/STAT2/PG outputs for LED or system interface indication of charge status, fault, and power good. The TMR pin enables programmable safety timer (3–10 hours), while CE pin provides external charge enable/disable control.

Key Specifications

Pinout & Package

Package: 10-pin DRC (3×3 mm MLP) with exposed thermal pad connected to VSS. Designed for low-profile, high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24061DRCR and BQ24063DRCR, the BQ24064DRCR uniquely combines 10.5 V OVP, CE-based charge control, and PG status output-making it optimal for end-equipment integration where adapter voltage headroom and host-controlled charging are required.

Availability

BQ24064DRCR is available at Aetrix Electronics and suitable for smartphone accessories, digital cameras, portable medical sensors, and wireless headphones requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for BQ24064DRCR 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 for industrial, automotive, and personal electronics markets.

The BQ24064DRCR belongs to TI's bq2406x family of highly integrated linear Li-ion chargers-designed specifically for space-limited portable devices needing thermal regulation, safety timers, and minimal external components.

FAQ

What is the input overvoltage protection threshold for BQ24064DRCR?

The BQ24064DRCR has a fixed 10.5 V input overvoltage protection (OVP) threshold, with 0.3–0.5 V hysteresis. When input voltage exceeds 10.5 V, the device disables charging and asserts PG high-impedance to indicate fault. This protects downstream circuitry from damage due to high-voltage adapters or transient surges-distinct from the 6.5 V OVP of BQ24061DRCR. The BQ24064DRCR resumes normal operation automatically once input falls below 10.2 V.

How is charge current programmed on BQ24064DRCR?

Charge current on the BQ24064DRCR is set by an external resistor (R_ISET) connected between ISET (Pin 6) and VSS. The relationship is I_OUT = K_SET × V_SET/R_ISET, where V_SET = 2.50 V (typical) and K_SET = 335 (typical) for 100–1000 mA range. For example, a 2.49 kΩ resistor yields ~1 A. A 0.47 µF capacitor must be placed between ISET and BAT to stabilize regulation. This method eliminates need for current-sense resistors or DACs-simplifying layout and cost.

Does BQ24064DRCR support battery temperature monitoring?

No, the BQ24064DRCR does not include a TS (temperature sense) pin and therefore lacks native NTC thermistor interface or temperature qualification. Unlike BQ24061DRCR or BQ24063DRCR, it omits the TS pin entirely-meaning thermal regulation is junction-based only (via internal sensor), and battery temperature window enforcement (e.g., 0°C–45°C) is not supported. For designs requiring battery pack thermistor monitoring, BQ24061DRCR or BQ24063DRCR must be selected instead.

What happens to BQ24064DRCR when input power is removed during charging?

When input power is removed, the BQ24064DRCR enters automatic sleep mode: STAT1/STAT2 go high-impedance, PG goes high-impedance, and quiescent current drops to 1 µA (typical). Reverse leakage protection prevents battery discharge into the IN pin. If battery voltage later falls below the recharge threshold (V_RCH = 75–135 mV below 4.2 V), and input power is reapplied with CE = LO, the device automatically restarts charging. This behavior ensures zero maintenance current and reliable re-engagement-critical for consumer electronics with intermittent USB connection.

Can BQ24064DRCR operate without a battery connected?

Yes, the BQ24064DRCR supports LDO Mode when the TMR pin is left floating (open circuit), disabling charge termination, battery detection, and safety timer. In this mode, OUT regulates to 4.2 V with up to 1 A output, but current capability drops at lower output voltages (see Figure 24 in datasheet). A 200 Ω feedback resistor (R8) between BAT and OUT is recommended to stabilize regulation. This mode is intended for production testing or auxiliary power supply-not for sustained battery-less operation in end equipment.