Diodes Incorporated AUR9807VSGD

Overview

AUR9807VSGD from Diodes Incorporated is a single-cell Li-ion battery charger IC with integrated Active Power Management (APM), 6V system output regulation, up to 1.5A programmable charge current via ISET1, and QFN-4.5×3.5-20 package. It simultaneously powers the system and charges the battery while prioritizing system load over charging current under heavy load-enabling use in portable devices requiring uninterrupted operation during charging.

For engineers reviewing the AUR9807VSGD datasheet, AUR9807VSGD pinout, AUR9807VSGD application, or AUR9807VSGD equivalent, key selection criteria include its 6V regulated output voltage (VS version), APM set-point control via APM pin, thermal regulation at 110°C junction limit, and dual power-source auto-selection between AC adapter and battery.

Technical Context

The AUR9807VSGD implements adaptive power path management using two internal MOSFETs (Q1 and Q2) with 40mΩ BAT-to-OUT conduction resistance. Its APM function dynamically adjusts charge current to maintain VOUT ≥ VAPM-REG (2.6–3.8V, scalable by 1.139–1.162×), ensuring system stability even when input supply is marginal.

It features dual-mode operation (AC/USB selected via MODE pin), programmable charge termination (via VTERM on ISET1), and temperature monitoring via TS pin with VLTF/VHTF thresholds (2.5V/0.5V). Sleep mode draws ≤5μA when no input source is present, enabling long battery standby.

Key Specifications

Pinout & Package

Package: QFN-4.5×3.5-20 with exposed thermal pad; RoHS-compliant, green (Pb-free).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion charger with system power management applications.

Compared with BQ24075RGTR and MP2617GQZ, the AUR9807VSGD uniquely provides analog-programmable APM set point (VAPM-SET), native 6V system regulation without post-regulation, and hardware-only operation-making it optimal for cost-sensitive, pin-constrained, or analog-control-dominant embedded systems.

Availability

AUR9807VSGD is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, solar-powered remote sensors, and wireless audio transmitters requiring stable component supply across production lifecycles.

Supply support for AUR9807VSGD 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AUR9807 belongs to Diodes' battery management IC product line, designed specifically for space-constrained portable electronics requiring simultaneous charging and system power delivery with minimal external components.

FAQ

What is the purpose of the APM pin on the AUR9807VSGD?

The APM pin accepts an analog voltage (2.6–3.8V) that sets the Active Power Management reference point. This value is multiplied by a fixed scaling factor (1.139–1.162) to determine VAPM-REG-the minimum system output voltage maintained under load. When VOUT drops to this level, the IC reduces charge current to prioritize system power delivery, preventing brownouts.

How does the AUR9807VSGD handle power source switching between adapter and battery?

The IC automatically selects the power source without external control: when VIN exceeds VBAT + VIN(DT) (55–130mV), it uses the adapter; otherwise, it draws from the battery. During transition, /PG deasserts within 50μs, and the 40mΩ BAT-to-OUT path ensures seamless handover with minimal voltage droop-critical for real-time applications.

Can the AUR9807VSGD be used with a 5V-only USB power source?

Yes. With MODE = Low (USB mode) and ISET2 = High, it limits total input current to 450mA while regulating system output to 6V. However, due to the 4.35V minimum VIN requirement, a 5V USB source meets spec. The IC will reduce charge current as needed to sustain 6V output-no additional boost converter is required.

What thermal protection mechanisms does the AUR9807VSGD implement?

It features dual thermal responses: junction temperature regulation begins at 110°C (TJ(REG)), where charge current folds back linearly; full thermal shutdown occurs at 150°C (TSHTDWN) with 25°C hysteresis. Both thresholds apply only to Q1 and Q3 power FETs, and the TS pin provides independent NTC-based battery temperature monitoring with dedicated high/low fault thresholds.