WM8351CGEB/V

Overview

The WM8351CGEB/V is an integrated audio and power management subsystem designed for portable multimedia systems. It combines a stereo Hi-Fi CODEC with comprehensive power management capabilities in a single chip. The audio section features DAC and ADC signal-to-noise ratios of 95dB (A-weighted at 48kHz) and supports sample rates from 8kHz to 48kHz. Power generation includes one DC-DC buck converter rated up to 1A, two additional buck converters up to 500mA, one boost converter (5V-20V), and four LDO regulators. It incorporates a single-cell lithium battery charger, LED drivers, and a real-time clock with wake-up alarm.

Feature Summary

• Integrated stereo Hi-Fi CODEC with programmable on-chip amplifiers for direct headphone and microphone connections.
• Comprehensive power management system including multiple DC-DC converters, LDOs, and autonomous power source selection.
• Built-in single-cell lithium battery charger with thermal protection and programmable charge parameters.
• On-chip real-time clock with wake-up alarm and watchdog timer for system monitoring.

Applications

• Portable Audio and Media players
• Portable Navigation Devices
• Portable systems powered by single-cell lithium batteries

Procurement Notes

Verify the specific suffix 'RV' against official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the required control interface modes and check for moisture sensitivity handling requirements during storage and assembly.

Selection Notes

Select this component when a unified solution for high-fidelity audio processing and complex power sequencing is required. Evaluate the need for integrated battery charging and LED driving functions to minimize external component count. Confirm that the BGA package format fits the target PCB layout constraints.

Part Context

The WM8351 belongs to the Wolfson AudioPlus series of audio and power management solutions. It is manufactured by Cirrus Logic (formerly Wolfson Microelectronics). The device integrates a ROM-programmable state machine to handle startup and shutdown sequences autonomously.

Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Generic cross-references may not match the specific pinout or internal register mapping of the WM8351 family.

FAQ

How does the WM8351 manage power source transitions?

The device features autonomous power source selection, allowing it to seamlessly transition between battery, wall adaptor, and USB bus power sources while managing the battery charger status.

What clocking options are available for the audio CODEC?

The master clock can be input directly or generated internally using an integrated low-power Frequency Locked Loop (FLL) supported by an on-chip crystal oscillator or internal RC oscillator.

Can the WM8351 drive display backlights directly?

Yes, it includes a programmable constant-current sink suitable for driving screen backlights or white LED photo flashes, along with open-drain outputs for RGB LEDs.