LP8552TLX/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP8552TLX/NOPB is an active LED Driver IC manufactured by Texas Instruments, designed for backlight applications requiring a 6-output DC-DC Step-Up (Boost) regulator with PWM dimming capability. This component integrates an internal switch and delivers 450mA per channel output current from a 2.7V to 22V supply, producing a regulated 40V output. The part is ROHS3 compliant, carries unlimited moisture sensitivity rating (MSL 1), and is currently in active production status with 3297 units in stock.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or specific application requirements that align with the electrical and mechanical parameters of the original component.

Substiute Parts

LP8552TLX/NOPB

Texas InstrumentsIn Stock: 3318LP8552TLX/NOPB Datasheet

Current PartRFQ

LP8552TLE/NOPB

Texas InstrumentsIn Stock: 1317LP8552TLE/NOPB Datasheet

Parametric EquivalentRFQ

ISL78171ARZ-T7A

Renesas Electronics CorporationIn Stock: 1249ISL78171ARZ-T7A Datasheet

MFR RecommendedRFQ

ISL97671AIRZ-T

Renesas Electronics CorporationIn Stock: 8100ISL97671AIRZ-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP8552TLX/NOPB is determined by the following critical parameters:

Primary Substitution Criteria:

• DC-DC Regulator topology (Step-Up/Boost configuration)
• 6 output channels for LED driver applications
• Internal switching capability
• PWM dimming support
• 40V output voltage capability
• Surface mount packaging suitable for backlight applications
• ROHS3 compliance and unlimited MSL rating
• Active product status

Parametric Equivalents maintain identical electrical specifications across supply voltage range, output current per channel, output voltage, dimming methodology, and thermal operating range.

Manufacturer-Recommended Alternatives provide functional equivalence with allowable variations in supply voltage range, output current capacity, operating temperature range, package form factor, and additional dimming control options, provided the core topology and output channel count remain consistent.

Parameter Comparison

Engineering Selection Recommendations

LP8552TLE/NOPB (Parametric Equivalent): This Texas Instruments part maintains complete electrical and thermal equivalence to the LP8552TLX/NOPB. Both components share identical supply voltage range (2.7V–22V), output voltage (40V), per-channel current capacity (450mA), package form factor (25-WFBGA), and operating temperature specification (-40°C to 85°C). MSL rating and RoHS3 compliance are identical. This substitute is suitable for direct replacement in applications where the original part number is unavailable.

ISL78171ARZ-T7A (Manufacturer-Recommended Alternative): This Renesas Electronics component provides functional equivalence with the following considerations: supply voltage range extends to 26.5V maximum, supporting broader input conditions; output voltage remains at 40V; per-channel current is reduced to 50mA, limiting total output power; package changes from 25-WFBGA to 20-VFQFN Exposed Pad, requiring PCB layout modification; operating temperature extends to 105°C, providing enhanced thermal margin; automotive-grade qualification (AEC-Q100) and MSL 1 rating are maintained. This part is suitable for applications with lower per-channel current requirements and extended temperature operation.

ISL97671AIRZ-T (Manufacturer-Recommended Alternative): This Renesas Electronics component offers functional equivalence with distinct trade-offs: supply voltage range extends to 26.5V maximum; output voltage increases to 45V, supporting higher LED string voltages; per-channel current is reduced to 50mA; package changes to 20-VFQFN Exposed Pad; operating temperature matches the original specification (-40°C to 85°C); MSL rating is 3 (168 Hours), indicating moisture sensitivity requiring controlled storage and handling; PWM dimming is supported without additional control interfaces. This part is suitable for applications requiring higher output voltage with lower per-channel current and standard moisture handling procedures.

All substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can LP8552TLE/NOPB be used as a direct replacement for LP8552TLX/NOPB?

A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications: 2.7V–22V supply range, 40V output, 450mA per-channel current, 25-WFBGA package, and -40°C to 85°C operating temperature. No circuit modifications are required.

Q: What are the key differences between the Texas Instruments LP8552 series and the Renesas ISL78171ARZ-T7A?

A: The ISL78171ARZ-T7A reduces per-channel current from 450mA to 50mA, extends supply voltage to 26.5V, changes package from 25-WFBGA to 20-VFQFN Exposed Pad, and extends operating temperature to 105°C. These differences require evaluation of application current requirements and PCB layout compatibility.

Q: What is the significance of the MSL 3 rating on ISL97671AIRZ-T compared to MSL 1 on the original part?

A: MSL 3 (168 Hours) indicates the component absorbs moisture during storage and requires controlled handling. The original LP8552TLX/NOPB with MSL 1 (Unlimited) has no moisture sensitivity restrictions. ISL97671AIRZ-T requires adherence to moisture control procedures during storage and assembly.

Q: Are all substitute parts suitable for backlight applications?

A: Yes. All listed substitute parts are specified for backlight applications and maintain the 6-output LED driver topology required for this function.

Q: Can ISL97671AIRZ-T replace LP8552TLX/NOPB in applications requiring 450mA per-channel output?

A: No. ISL97671AIRZ-T is rated for 50mA per-channel maximum, insufficient for applications requiring 450mA per-channel. LP8552TLE/NOPB is the appropriate substitute for this requirement.

Q: What package considerations apply when substituting ISL78171ARZ-T7A or ISL97671AIRZ-T?

A: Both Renesas parts use 20-VFQFN Exposed Pad packaging, differing from the original 25-WFBGA. PCB footprint, trace routing, and thermal management design must be re-evaluated for compatibility.

Q: Do all substitute parts support PWM dimming?

A: Yes. LP8552TLE/NOPB and ISL97671AIRZ-T support PWM dimming. ISL78171ARZ-T7A supports PWM, Analog, and I2C dimming, providing additional control flexibility.