RT8555AWSC Equivalent & Substitute Parts

Part Overview

The RT8555AWSC is a 6-output LED driver IC with integrated DC-DC step-up (boost) regulator functionality, designed for backlight applications. This component features analog and PWM dimming capabilities, operating across a 2.7V to 24V supply range with 36V output capability. The RT8555AWSC is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

RT8555AWSC

Richtek USA Inc.In Stock: 2818RT8555AWSC Datasheet

Current PartRFQ

RT8555BWSC

Richtek USA Inc.In Stock: 1648RT8555BWSC Datasheet

Parametric EquivalentRFQ

RT8555WSC

Richtek USA Inc.In Stock: 1526RT8555WSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT8555AWSC is determined by strict parametric equivalence across the following critical criteria:

Mandatory Matching Parameters:

• Topology: Step-Up (Boost) DC-DC regulator
• Number of Outputs: 6
• Voltage - Supply Range: 2.7V to 24V
• Voltage - Output: 36V
• Current - Output / Channel: 35mA
• Frequency Range: 300kHz ~ 2MHz
• Dimming Capability: Analog and PWM
• Package / Case: 20-UFBGA, WLCSP
• Supplier Device Package: 20-WLCSP (1.65x2.05)
• Operating Temperature Range: -40°C ~ 85°C (TA)

All identified substitute parts maintain identical electrical specifications and mechanical packaging, ensuring direct functional replacement without circuit redesign or layout modification.

Parameter Comparison

Engineering Selection Recommendations

RT8555BWSC is an active parametric equivalent offering identical electrical and mechanical specifications to the obsolete RT8555AWSC. This part maintains the same MSL rating (3, 168 Hours) and provides direct functional replacement with confirmed current inventory availability.

RT8555WSC is an active parametric equivalent with superior moisture sensitivity characteristics (MSL 1, Unlimited) compared to the RT8555AWSC. This part offers enhanced reliability in moisture-sensitive environments while maintaining all electrical and mechanical compatibility. The RT8555WSC is supplied in Cut Tape (CT) and Digi-Reel® packaging formats.

Both substitute parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the original component. Selection between RT8555BWSC and RT8555WSC should be based on packaging format requirements and moisture exposure conditions in the target application environment.

Frequently Asked Questions (FAQ)

Q: Can RT8555BWSC and RT8555WSC be used interchangeably with RT8555AWSC?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (6-output boost regulator, 2.7V-24V input, 36V output, 35mA per channel, 300kHz-2MHz frequency, analog/PWM dimming) and mechanical packaging (20-WLCSP 1.65x2.05). No circuit redesign or PCB layout modification is required.

Q: What is the difference between RT8555BWSC and RT8555WSC?

A: The primary difference is moisture sensitivity level (MSL). RT8555BWSC has MSL 3 (168 Hours), while RT8555WSC has MSL 1 (Unlimited). RT8555WSC also offers Cut Tape and Digi-Reel® packaging options. Both maintain identical electrical performance and thermal operating range (-40°C to 85°C).

Q: Why is the RT8555AWSC classified as obsolete?

A: The RT8555AWSC is listed as obsolete by the manufacturer. RT8555BWSC and RT8555WSC are active alternatives that provide equivalent functionality and are recommended for new designs and production applications.

Q: Are there any compliance or certification differences?

A: All three parts (RT8555AWSC, RT8555BWSC, RT8555WSC) are ROHS3 compliant and REACH Unaffected. Regulatory status is identical across all variants.

Q: What packaging formats are available for these parts?

A: RT8555AWSC and RT8555BWSC are supplied in standard packaging. RT8555WSC is available in Cut Tape (CT) and Digi-Reel® formats, providing additional supply chain flexibility for high-volume production requirements.