LC5710S LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5710S is an active, non-isolated LED lighting driver IC manufactured by Sanken Electric USA Inc. This single-output DC-DC controller integrates step-down (buck) and step-up (boost) topologies with analog and PWM dimming capabilities, designed for lighting applications. The device operates across a 5V to 58V supply range with 500mA output current and is packaged in an 8-SOP surface-mount configuration.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or application-specific performance needs while maintaining functional compatibility within the LED driver controller category.

Substiute Parts

LC5710S

Sanken Electric USA Inc.In Stock: 918LC5710S Datasheet

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AT9933LG-G

Microchip TechnologyIn Stock: 3335AT9933LG-G Datasheet

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HV9912NG-G

Microchip TechnologyIn Stock: 44822HV9912NG-G Datasheet

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MAX1698EUB+T

Analog Devices Inc./Maxim IntegratedIn Stock: 6779MAX1698EUB+T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LC5710S is determined by the following critical parameters:

Primary Compatibility Criteria:

• Single output DC-DC controller topology
• Surface-mount packaging in SOIC family
• Operating temperature range of -40°C to 125°C
• Active product status
• RoHS compliance

Topology Flexibility: The LC5710S supports both step-down (buck) and step-up (boost) configurations. Substitute parts must support at least one of these topologies. Parts supporting additional topologies (such as SEPIC) remain compatible as they encompass the required functionality.

Voltage and Current Parameters: Substitute parts must accommodate the application's supply voltage and output current requirements. The LC5710S operates from 5V to 58V; substitutes with overlapping or extended voltage ranges are acceptable. Output current specifications are evaluated based on application demands.

Dimming Capability: The LC5710S provides both analog and PWM dimming. Substitutes offering PWM dimming alone remain functionally compatible for PWM-based lighting control applications.

Package Considerations: The 8-SOIC package is the primary form factor. Substitutes in alternative SOIC packages (8-SOIC, 10-SOIC, 16-SOIC) are acceptable provided PCB layout accommodates the physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

AT9933LG-G (Microchip Technology)

The AT9933LG-G is a direct topology match supporting step-down and step-up configurations in an 8-SOIC package. It operates to 75V maximum supply voltage, exceeding the LC5710S range. The device is AEC-Q100 qualified for automotive applications and ROHS3 compliant. PWM dimming is supported; analog dimming is not specified. Operating temperature range matches the LC5710S (-40°C to 125°C). This substitute is suitable for applications requiring extended voltage headroom and automotive-grade reliability.

HV9912NG-G (Microchip Technology)

The HV9912NG-G provides step-down, step-up, and SEPIC topologies in a 16-SOIC package with a 9V to 100V supply range. It supports both analog and PWM dimming, matching the LC5710S dimming capabilities. Operating temperature range is -40°C to 125°C. The expanded topology set and higher voltage rating accommodate applications requiring SEPIC operation or extended input voltage ranges. Package size increase (16-SOIC versus 8-SOIC) requires PCB layout verification. ROHS3 compliant with MSL 1 rating.

MAX1698EUB+T (Analog Devices Inc./Maxim Integrated)

The MAX1698EUB+T is a step-up (boost) only controller in a 10-uMAX/uSOP package with a 2.7V to 5.5V supply range. This substitute is applicable only to boost-only lighting applications within the 2.7V to 5.5V input window. Operating temperature range is -40°C to 85°C, which is narrower than the LC5710S. Dimming capability is not specified. ROHS3 compliant with MSL 1 rating. This part is suitable for low-voltage backlight applications but does not support the full voltage and topology range of the LC5710S.

Frequently Asked Questions (FAQ)

Q: Can the AT9933LG-G replace the LC5710S in all applications?

A: The AT9933LG-G supports the same step-down and step-up topologies and operates in the same temperature range. However, it specifies PWM dimming only, whereas the LC5710S supports both analog and PWM dimming. If the application requires analog dimming control, the AT9933LG-G may not be suitable without circuit redesign. Both devices are packaged in 8-SOIC, allowing direct PCB substitution.

Q: What is the primary advantage of the HV9912NG-G?

A: The HV9912NG-G extends the maximum supply voltage to 100V and adds SEPIC topology support. It maintains both analog and PWM dimming capabilities and the same operating temperature range as the LC5710S. The trade-off is a larger 16-SOIC package, which requires verification that the PCB layout can accommodate the increased pin count and physical dimensions.

Q: Is the MAX1698EUB+T a general-purpose substitute?

A: No. The MAX1698EUB+T is limited to step-up (boost) operation and operates only from 2.7V to 5.5V. It is suitable only for low-voltage backlight applications within this input range. Applications requiring step-down capability or higher input voltages cannot use this part.

Q: What packaging considerations apply when substituting these parts?

A: The LC5710S uses an 8-SOIC package. The AT9933LG-G also uses 8-SOIC and can be substituted without PCB modification. The HV9912NG-G uses a 16-SOIC package with different pin assignments; PCB layout must be redesigned. The MAX1698EUB+T uses a 10-uMAX/uSOP package with different dimensions and pin count; PCB redesign is required.

Q: Are all substitute parts RoHS compliant?

A: Yes. The LC5710S is RoHS Compliant. All three substitute parts are ROHS3 Compliant, which exceeds the original specification and is acceptable for RoHS-regulated applications.

Q: What is the operating temperature difference between the LC5710S and MAX1698EUB+T?

A: The LC5710S operates from -40°C to 125°C. The MAX1698EUB+T operates from -40°C to 85°C. Applications requiring operation above 85°C cannot use the MAX1698EUB+T. The AT9933LG-G and HV9912NG-G both match the -40°C to 125°C range.

Q: Can I use the HV9912NG-G in a design originally specified for the LC5710S without any changes?

A: PCB layout changes are required due to the package difference (16-SOIC versus 8-SOIC). However, the electrical functionality is compatible. The HV9912NG-G supports all topologies and dimming modes of the LC5710S, plus additional SEPIC capability. Schematic review is recommended to confirm that the application does not depend on specific pin assignments or package-dependent parasitic characteristics.

Q: Which substitute part has the widest supply voltage range?

A: The HV9912NG-G supports 9V to 100V, the widest range among the substitutes. The AT9933LG-G supports up to 75V. The MAX1698EUB+T is limited to 2.7V to 5.5V. The LC5710S operates from 5V to 58V.