Diodes Incorporated AUR9801DGD

Overview

AUR9801DGD from Diodes Incorporated is a single-cell Li-ion/Li-polymer battery charger IC with integrated power pass device, supporting USB or 5V AC adapter input, 0.6% charge voltage accuracy (4.2 V), programmable charge current up to 800 mA (via IREF pin), and thermal fold-back protection triggered at +107°C. It operates in CC/CV profiles with preconditioning, recharge threshold at 4.05 V, and NTC-based temperature monitoring for safe charging in portable medical handhelds and smartphones.

For engineers reviewing the AUR9801DGD datasheet, AUR9801DGD pinout, AUR9801DGD application, or AUR9801DGD equivalent, this page delivers verified functional identity, validated WDFN-3×3-10 package mapping, confirmed 10-pin terminal roles, real-world thermal fold-back behavior, and accurate timing capacitor configuration for charge safety timer implementation.

Technical Context

The AUR9801DGD implements a linear charging architecture with internal PMOS pass element, enabling direct VIN-to-VBAT regulation without external blocking diode. Its dual-stage CC/CV control loop uses an internal 333 Hz oscillator (set by TIME pin capacitor) and integrates a 2.8 V reference (V2P8) for NTC biasing and precision voltage feedback.

Thermal management combines junction-based fold-back (activation at +107°C) and external NTC monitoring via TEMP pin, where VTMIN = 1.0 V and VTMAX = 2.0 V define safe operating temperature window. The chip enters shutdown when EN is low or VIN falls below 2.5 V, and asserts FAULT on timeout, over/under-temperature, or battery removal.

Key Specifications

Pinout & Package

The AUR9801DGD is housed in a thermally enhanced WDFN-3×3-10 package with exposed thermal pad connected to GND, optimized for PCB heat dissipation in compact portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGER and TP4056, the AUR9801DGD uniquely combines junction-based thermal fold-back, precise 0.6% voltage regulation, and a dedicated 2.8 V reference for robust NTC biasing-making it suitable for thermally constrained medical and portable instrumentation where safety integrity is critical.

Availability

AUR9801DGD is available at Aetrix Electronics and suitable for smartphones, portable medical instruments, and self-charging battery packs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AUR9801DGD 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AUR9801DGD belongs to Diodes' battery management IC product line, designed specifically for compact, thermally sensitive portable electronics requiring high-accuracy linear charging with integrated safety features.

FAQ

What is the recommended timing capacitor value for the TIME pin?

The datasheet specifies a 15 nF capacitor on the TIME pin to configure the internal oscillator at 333 Hz, which sets both the charge safety timer duration and internal clocking for state transitions. Using values outside 15 nF alters timer accuracy and may cause premature timeout or extended charging cycles; tolerance should be ≤±10% for reliable operation.

How does the AUR9801DGD handle battery removal during charging?

When the battery is disconnected, the TEMP pin voltage shifts outside the VTMIN–VTMAX window, triggering a fault condition. The FAULT pin pulls low, STATUS goes high, and charging halts immediately. The chip remains in this fault-latched state until EN is cycled or VIN is removed and reapplied, ensuring no uncontrolled reconnection attempts.

Can the AUR9801DGD operate from a 4.6 V input without derating?

Yes-the datasheet specifies 4.6 V as the minimum recommended input voltage under all operating conditions. At 4.6 V, the device maintains full functionality including 800 mA charge current, 4.2 V regulation, and thermal fold-back, provided ambient temperature stays within –40°C to +85°C and PCB thermal design meets θJA ≤ 45.13°C/W.

What is the function of the V2P8 pin beyond NTC biasing?

V2P8 provides a stable 2.8 V ±0.1 V reference output capable of sourcing up to 2 mA. Beyond biasing the NTC network, it can power external comparators, ADC references, or low-current supervisory circuits-enabling system-level battery health monitoring without adding a separate voltage reference IC.