RT7322CGGSP LED Driver IC Equivalent & Substitute Parts

Part Overview

The RT7322CGGSP is a linear LED driver IC manufactured by Richtek USA Inc., designed for single-output LED lighting applications with a fixed 20mA output current. This device operates across a wide supply voltage range of 1V to 90V and is housed in an 8-SOP-EP package with an exposed pad for thermal management.

The RT7322CGGSP has reached obsolete product status. Identifying qualified substitute parts is essential for design continuity, procurement planning, and ensuring long-term availability for production and maintenance applications.

Substiute Parts

RT7322CGGSP

Richtek USA Inc.In Stock: 902RT7322CGGSP Datasheet

Current PartRFQ

AL1791AFE-13

Diodes IncorporatedIn Stock: 30319AL1791AFE-13 Datasheet

SimilarRFQ

PAM2800AABR

Diodes IncorporatedIn Stock: 35220PAM2800AABR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT7322CGGSP are identified based on the following core substitution criteria:

Primary Matching Parameters:

• Single output LED driver topology
• Linear driver architecture with internal switching capability
• Surface mount packaging with exposed pad thermal design
• Operating temperature range compatibility (-40°C minimum)
• RoHS3 compliance and REACH unaffected status

Substitution Logic: The RT7322CGGSP operates as a fixed-current linear LED driver without dimming functionality across a 1V to 90V supply range at 20mA output. Substitute parts must maintain linear driver topology and single-output configuration. While substitute devices may offer enhanced features (such as PWM dimming or higher current ratings), they remain functionally compatible for applications where the original 20mA fixed-current operation is required. Package differences are acceptable provided thermal and electrical performance requirements are met.

Parameter Comparison

Engineering Selection Recommendations

AL1791AFE-13 (Diodes Incorporated): The AL1791AFE-13 is an active product with extended operating temperature range (-40°C to 125°C) and unlimited MSL rating, providing superior long-term availability and storage flexibility. This device supports higher output current (1A) and includes analog and PWM dimming capabilities. The supply voltage range (6.5V to 30V) is narrower than the RT7322CGGSP but covers standard LED driver applications. RoHS3 compliance and REACH unaffected status align with regulatory requirements.

PAM2800AABR (Diodes Incorporated): The PAM2800AABR is an active product with unlimited MSL rating and RoHS3 compliance. Output current capability (350mA) exceeds the RT7322CGGSP requirement. The supply voltage range (3.7V to 5.5V) is restricted to lower voltage applications compared to the original device. This substitute is suitable for designs operating within the specified voltage window and requiring higher current capacity than 20mA.

Both substitute parts maintain linear driver topology, single-output configuration, and surface mount design. Selection depends on application-specific voltage supply requirements and desired feature set.

Frequently Asked Questions (FAQ)

Q: Can the AL1791AFE-13 directly replace the RT7322CGGSP in all applications?

A: The AL1791AFE-13 maintains linear driver topology and single-output configuration required for functional compatibility. However, the supply voltage range differs: AL1791AFE-13 operates 6.5V to 30V versus RT7322CGGSP's 1V to 90V. Applications requiring supply voltages below 6.5V or above 30V require alternative evaluation.

Q: What is the significance of the MSL rating difference?

A: The RT7322CGGSP carries MSL 3 (168 hours), requiring controlled moisture exposure during storage and handling. Both substitute parts carry MSL 1 (unlimited), eliminating moisture sensitivity constraints and simplifying inventory management and procurement logistics.

Q: Are package differences between these devices significant?

A: Yes. The RT7322CGGSP uses 8-SOIC packaging, while AL1791AFE-13 uses 14-UFDFN and PAM2800AABR uses SOT-25. PCB layout, thermal management, and component placement must be re-evaluated for each substitute. Exposed pad designs in all three devices support thermal dissipation.

Q: Does the absence of dimming in the PAM2800AABR limit its use as a substitute?

A: No. The RT7322CGGSP also lacks dimming capability. The PAM2800AABR's fixed-current operation aligns with the original device's functional behavior. Applications requiring dimming should evaluate the AL1791AFE-13, which supports analog and PWM dimming.

Q: How do output current ratings affect substitution?

A: The RT7322CGGSP provides fixed 20mA output. Both substitutes offer higher current capacity (AL1791AFE-13: 1A, PAM2800AABR: 350mA). Higher-rated devices can operate at lower currents through external current-limiting resistor adjustment, maintaining compatibility with 20mA LED applications.

Q: Are all three devices RoHS3 compliant?

A: Yes. The RT7322CGGSP, AL1791AFE-13, and PAM2800AABR are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.