Renesas ISL6292BCRZ

Overview

ISL6292BCRZ from Renesas Electronics is a single-cell Li-ion/Li-polymer battery charger IC with dual-mode charge architecture, 4.2V fixed output voltage, programmable charge current up to 1.5A, thermal foldback activation at 100°C, and integrated tri-color LED driver for status indication - deployed in space-constrained travel chargers and USB-powered charging solutions.

For engineers reviewing the ISL6292BCRZ datasheet, ISL6292BCRZ pinout, ISL6292BCRZ application, or ISL6292BCRZ equivalent, key selection considerations include its QFN-16 (4×4 mm) thermally enhanced package, NTC-based ambient temperature monitoring with dual-level thresholds, remote voltage sensing via VSEN, safety timer programmability via external capacitor, and absence of external blocking diode requirement.

Technical Context

The ISL6292BCRZ implements Renesas' dual-mode charging architecture that dynamically leverages a current-limited AC/DC adapter to achieve low thermal dissipation: during constant-current phase, it operates in current-source mode where charge current equals adapter's ILIM; during constant-voltage phase, it transitions to linear regulation at 4.2V with automatic current tapering.

Its internal circuitry includes a 100mV-offset comparator ensuring VIN > VBAT before enabling charge, a 2.9V bias rail (V2P9) for external NTC biasing, open-drain RED/GRN outputs driving tri-color LEDs, and a DT pin that reconfigures ambient temperature thresholds between charging and non-charging states using external resistor networks.

Key Specifications

Pinout & Package

ISL6292BCRZ is housed in a thermally enhanced 16-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. The package enables high power density and efficient heat transfer to PCB copper planes via soldered thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and MP2617GQ-Z, the ISL6292BCRZ uniquely combines dual-mode low-heat operation, programmable thermal foldback slope (100 mA/°C), and true remote voltage sensing - making it optimal for ultra-compact, thermally constrained travel charger designs where precision and spatial efficiency are critical.

Availability

ISL6292BCRZ is available at Aetrix Electronics and suitable for smartphone travel chargers, USB-powered portable medical devices, and self-charging battery packs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ISL6292BCRZ 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC products for automotive, industrial, infrastructure, and IoT applications.

The ISL6292BCRZ belongs to Renesas' dedicated battery management IC portfolio, designed specifically for space-constrained, thermally sensitive single-cell Li-ion charging applications such as travel adapters and portable instrumentation.

FAQ

What is the primary function of the ISL6292BCRZ?

The ISL6292BCRZ is a single-cell Li-ion/Li-polymer battery charger IC implementing Renesas' dual-mode architecture. Its primary function is to deliver precise 4.2 V constant-voltage charging with programmable constant-current up to 1.5 A, while minimizing thermal generation in compact travel charger and USB-powered applications. It integrates pass transistor, current sensing, LED drivers, and NTC-based temperature monitoring - eliminating need for external blocking diodes or discrete current-sense resistors.

How does the ISL6292BCRZ achieve low thermal operation?

The ISL6292BCRZ achieves low thermal operation through its dual-mode charge architecture: it leverages a current-limited AC/DC adapter to shift operational mode - acting as a current source during constant-current phase (minimizing voltage drop across internal FET) and transitioning to linear regulation only during constant-voltage phase. Combined with thermal foldback (100 mA/°C reduction above 100°C) and a thermally enhanced 4×4 mm QFN package (θJC = 4°C/W), the ISL6292BCRZ sustains high charge currents without excessive die heating in space-limited enclosures.

What is the role of the VSEN pin on the ISL6292BCRZ?

The VSEN pin on the ISL6292BCRZ enables remote voltage sensing at the battery terminals. It connects directly to the battery pack's positive terminal, allowing the ISL6292BCRZ to regulate output voltage based on actual battery voltage rather than the voltage at the IC's BAT pin. This compensates for IR drop across PCB traces, connectors, or protection circuits - ensuring the battery receives precisely 4.20 V ±1%, critical for maximizing capacity and cycle life in production-grade portable devices.

Can the ISL6292BCRZ be used without an external NTC thermistor?

Yes, the ISL6292BCRZ can operate without an external NTC thermistor. The TEMP and DT pins default to high-impedance states if left unconnected, and ambient temperature monitoring is disabled. All other functions - including CC/CV charging, LED indication, safety timer, and thermal foldback - remain fully operational. However, omitting the NTC forfeits over/under-temperature protection, which is required for UL/IEC 62368-1 compliance in commercial battery chargers.

What is the purpose of the DT pin on the ISL6292BCRZ?

The DT pin on the ISL6292BCRZ dynamically adjusts the ambient temperature monitoring window during charging. When the charger is inactive, DT is shorted to GND internally, configuring the NTC divider for a standard -5°C to 45°C window. When charging begins, DT disconnects, enabling an external resistor (RD) to raise the upper temperature threshold (e.g., to 45°C + ΔT). This prevents false thermal shutdown caused by PCB self-heating during operation - a key feature for reliable performance in sealed, thermally isolated travel charger housings.