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RT8497CGS LED Driver IC Equivalent & Substitute Parts
Part Overview
The RT8497CGS is an AC DC offline switcher LED driver IC manufactured by Richtek USA Inc., designed for lighting applications with a 1.4A output capacity and step-down (buck) topology. This component operates across a 10V to 30V supply range and is housed in an 8-SOP package. The RT8497CGS is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | RT8497CGS |
| Manufacturer | Richtek USA Inc. |
| Category | Power Management (PMIC) |
| Type | AC DC Offline Switcher |
| Topology | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 10V |
| Voltage - Supply (Max) | 30V |
| Current - Output / Channel | 1.4A |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitute parts for the RT8497CGS are categorized based on strict parametric alignment with the main part's electrical and mechanical specifications. The primary substitution criteria are:
Key Parameters for Substitution:
- Type: AC DC Offline Switcher
- Topology: Step-Down (Buck)
- Number of Outputs: 1
- Voltage - Supply Range: 10V to 30V
- Current - Output / Channel: 1.4A
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Operating Temperature Range: -40°C ~ 85°C (TA)
- Internal Switch(s): Yes
- RoHS Status: ROHS3 Compliant
Parametric Equivalent Parts (RT8497AGS, RT8497BGS, RT8497GS) share identical electrical specifications, topology, output capacity, supply voltage range, package configuration, and thermal operating range. These parts are direct functional equivalents from the same manufacturer base product line (RT8497 series).
Similar Parts (AL9910A-5SP-13, LYT3316D-TL, MP4050AGS-Z, MP4088GN-Z) meet the core functional requirements of AC DC offline switcher LED driver operation but may differ in supply voltage range, topology variations, dimming capabilities, frequency, or thermal specifications. These parts are suitable for applications where the specific parameter variations are compatible with system requirements.
Parameter Comparison
| Parameter | RT8497CGS | RT8497AGS | RT8497BGS | RT8497GS | AL9910A-5SP-13 | LYT3316D-TL | MP4050AGS-Z | MP4088GN-Z |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Richtek USA Inc. | Richtek USA Inc. | Richtek USA Inc. | Richtek USA Inc. | Diodes Incorporated | Power Integrations | Monolithic Power Systems Inc. | Monolithic Power Systems Inc. |
| Type | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher |
| Topology | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck), Step-Up (Boost) | Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Buck, Boost |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 10V | 10V | 10V | 10V | 20V | 85VAC | 4.1V | 4.5V |
| Voltage - Supply (Max) | 30V | 30V | 30V | 30V | 500V | 132VAC | 5V | 5V |
| Current - Output / Channel | 1.4A | 1.4A | 1.4A | 1.4A | Not Specified | Not Specified | Not Specified | Not Specified |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) Exposed Pad | 16-SOIC (0.154", 3.90mm Width), 14 Leads | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) Exposed Pad |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Internal Switch(s) | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Parametric Equivalent Selection (RT8497AGS, RT8497BGS, RT8497GS):
These three parts are direct parametric equivalents to the RT8497CGS. All share identical electrical specifications, including 10V to 30V supply voltage range, 1.4A output current, step-down buck topology, single output configuration, and 8-SOIC package. All are classified as obsolete but maintain ROHS3 compliance and identical thermal operating ranges (-40°C to 85°C). Selection among these three should be based on packaging availability (Cut Tape & Digi-Reel vs. standard packaging) and inventory status. RT8497AGS offers the highest inventory (25,300 pcs), followed by RT8497GS (5,026 pcs) and RT8497BGS (2,000 pcs).
Similar Part Selection (AL9910A-5SP-13, LYT3316D-TL, MP4050AGS-Z, MP4088GN-Z):
These parts function as AC DC offline switcher LED drivers but with parameter variations requiring application-level compatibility assessment:
AL9910A-5SP-13 (Diodes Incorporated) operates across 20V to 500V supply range with buck and boost topology options and internal switch configuration. This part is active and offers extended thermal range (-40°C to 105°C). The higher supply voltage maximum and topology flexibility make it suitable for applications requiring wider input voltage tolerance.
LYT3316D-TL (Power Integrations) operates on 85VAC to 132VAC input with multiple topology options (Flyback, SEPIC, Buck, Boost) and triac dimming capability. This part is active with extended thermal range (-40°C to 150°C). The AC input specification and triac dimming distinguish this part for direct AC line-powered lighting applications.
MP4050AGS-Z (Monolithic Power Systems Inc.) operates across 4.1V to 5V supply range with step-down buck topology and 22kHz frequency. This part is active with automotive grade and extended thermal range (-40°C to 125°C). The lower supply voltage range limits this part to low-voltage DC applications.
MP4088GN-Z (Monolithic Power Systems Inc.) operates across 4.5V to 5V supply range with buck and boost topology options, triac dimming, and 22kHz frequency. This part is active with extended thermal range (-40°C to 125°C). The lower supply voltage range and triac dimming capability position this part for low-voltage DC lighting with dimming control.
All substitute parts maintain ROHS3 compliance or equivalent RoHS compliance status.
Frequently Asked Questions (FAQ)
Q: Can RT8497AGS, RT8497BGS, and RT8497GS be used interchangeably with RT8497CGS?
A: Yes. These three parts are parametric equivalents with identical electrical specifications, topology, output current, supply voltage range, package configuration, and thermal operating range. Selection should be based on packaging format availability and inventory status.
Q: What is the primary difference between parametric equivalent parts and similar parts?
A: Parametric equivalent parts (RT8497AGS, RT8497BGS, RT8497GS) match all key electrical and mechanical specifications of the RT8497CGS. Similar parts (AL9910A-5SP-13, LYT3316D-TL, MP4050AGS-Z, MP4088GN-Z) meet the core functional requirement of AC DC offline switcher LED driver operation but differ in supply voltage range, topology options, dimming methods, or thermal specifications. Similar parts require application-level compatibility verification.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance or equivalent RoHS compliance status, consistent with the RT8497CGS specification.
Q: What packaging options are available for the parametric equivalent parts?
A: RT8497AGS and RT8497GS are available in Cut Tape (CT) & Digi-Reel® packaging. RT8497BGS packaging format is not specified in available data. All three maintain the 8-SOIC (0.154", 3.90mm Width) package case specification.
Q: Which substitute parts are currently in active production status?
A: AL9910A-5SP-13, LYT3316D-TL, MP4050AGS-Z, and MP4088GN-Z are all classified as active products. The parametric equivalent parts (RT8497AGS, RT8497BGS, RT8497GS) and the main part (RT8497CGS) are obsolete.
Q: Can similar parts with different supply voltage ranges be used in applications designed for 10V to 30V input?
A: No. Parts with different supply voltage specifications (such as MP4050AGS-Z at 4.1V to 5V or LYT3316D-TL at 85VAC to 132VAC) require circuit redesign and are not direct substitutes for applications specified for 10V to 30V DC input.
Q: What is the significance of internal switch configuration in LED driver selection?
A: Internal switch configuration determines whether the IC includes integrated power switching capability. The RT8497CGS and all parametric equivalent parts include internal switches. AL9910A-5SP-13 does not include an internal switch, requiring external switching components and potentially different circuit topology.
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