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LC5205D LED Driver IC Equivalent & Substitute Parts
Part Overview
The LC5205D is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for offline PWM dimming applications with 400mA output capability. This component operates across a wide supply voltage range (25V to 400V) and features an internal switch for step-down (buck) topology conversion. The LC5205D is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.
Substiute Parts
Key Parameters
| Parameter | LC5205D Value |
|---|---|
| Manufacturer | Sanken Electric USA Inc. |
| Category | Power Management (PMIC) |
| Type | AC DC Offline Switcher |
| Topology | Step-Down (Buck) |
| Internal Switch(s) | Yes |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 25V |
| Voltage - Supply (Max) | 400V |
| Current - Output / Channel | 400mA |
| Frequency | 200kHz |
| Dimming | PWM |
| Operating Temperature | -40°C ~ 105°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm), 7 Leads |
| RoHS Status | RoHS Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the LC5205D is determined by the following critical parameters:
- Type & Topology: AC DC offline switcher with step-down (buck) conversion capability
- Internal Switch Requirement: Presence of integrated power switch
- Supply Voltage Range: Minimum 25V to maximum 400V input capability
- Output Current: 400mA channel capacity
- Dimming Method: PWM dimming support
- Mounting & Package: Through-hole or surface-mount alternatives with compatible pinout
- Operating Temperature Range: -40°C to 105°C minimum
- Compliance: RoHS compliance status
Substitute parts are grouped into two categories:
Parametric Equivalent: LC5202D shares identical functional specifications with the LC5205D except for maximum supply voltage (200V vs. 400V), making it suitable for applications not requiring the full 400V input range.
Similar Functional Alternatives: AL9910S-13, FL7701MX, HV98101T-E/CH, HV9921N8-G, LM3445M/NOPB, LM3497MMX/NOPB, and LNK409LG provide AC DC offline switcher functionality with PWM or alternative dimming methods. These parts differ in topology variations (boost capability), internal switch configuration, package type, or specific voltage/current ratings but maintain core LED driver functionality.
Parameter Comparison
| Parameter | LC5205D | LC5202D | AL9910S-13 | FL7701MX | HV98101T-E/CH | HV9921N8-G | LM3445M/NOPB | LM3497MMX/NOPB | LNK409LG |
|---|---|---|---|---|---|---|---|---|---|
| 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 | AC DC Offline Switcher |
| Topology | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Flyback |
| Internal Switch(s) | Yes | Yes | No | No | No | Yes | No | No | Yes |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 25V | 25V | 15V | 9V | 8V | 20V | 8V | 8V | 36V |
| Voltage - Supply (Max) | 400V | 200V | 500V | 20V | 16V | 400V | 12V | 12V | 725V |
| Current - Output / Channel | 400mA | 400mA | — | — | — | 20mA | — | — | 3.26A |
| Frequency | 200kHz | 200kHz | 25kHz ~ 300kHz | 20kHz ~ 250kHz | — | — | 30kHz ~ 1MHz | — | 66kHz |
| Dimming | PWM | PWM | Analog, PWM | Analog | — | Triac | Triac | Triac | Triac |
| Operating Temperature | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm), 7 Leads | 8-DIP (0.300", 7.62mm), 7 Leads | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | SOT-23-6 | TO-243AA | 14-SOIC (0.154", 3.90mm Width) | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 7-SSIP, 6 Leads, Exposed Pad, Formed Leads |
| RoHS Status | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant |
| Product Status | Obsolete | Obsolete | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
LC5202D is the primary parametric equivalent for direct replacement in applications where the maximum supply voltage requirement does not exceed 200V. Both parts share identical 400mA output current, 200kHz frequency, PWM dimming capability, through-hole 8-DIP packaging, and RoHS compliance. This part maintains the highest compatibility with existing LC5205D designs.
AL9910S-13 (Diodes Incorporated) provides active product status with extended supply voltage range (15V to 500V) and dual topology support (buck and boost). However, it requires surface-mount assembly and lacks specified output current rating. ROHS3 compliance is confirmed.
HV9921N8-G (Microchip Technology) offers active status with matching 20V to 400V supply range and internal switch configuration. Output current is limited to 20mA, and dimming is triac-based rather than PWM. Surface-mount SOT-89-3 package requires PCB redesign. ROHS3 compliant.
LNK409LG (Power Integrations) provides the highest current capability (3.26A) and widest supply voltage range (36V to 725V) with active product status. Topology is flyback rather than buck, and dimming is triac-based. Through-hole eSIP-7F package maintains board-level compatibility. RoHS compliant with extended operating temperature to 150°C.
FL7701MX (Fairchild Semiconductor) operates at lower supply voltages (9V to 20V) with analog dimming only. Suitable only for low-voltage LED driver applications. Active product status with extended temperature range (-40°C to 125°C).
HV98101T-E/CH, LM3445M/NOPB, and LM3497MMX/NOPB are limited to low supply voltages (8V to 16V maximum) and are not suitable for the LC5205D's 25V to 400V input range. These parts serve different application segments.
Frequently Asked Questions (FAQ)
Q: Can LC5202D directly replace LC5205D in all applications?
A: LC5202D is a direct parametric equivalent for applications where maximum input voltage does not exceed 200V. If your design requires the full 400V input capability of the LC5205D, LC5202D is not suitable. Both parts share identical 400mA output current, 200kHz switching frequency, PWM dimming, 8-DIP through-hole packaging, and operating temperature range.
Q: Why do substitute parts have different dimming methods (PWM vs. Triac)?
A: Dimming method selection depends on the end-application control interface. PWM dimming (LC5205D, LC5202D, AL9910S-13) requires digital PWM signal input. Triac dimming (HV9921N8-G, LM3445M/NOPB, LM3497MMX/NOPB, LNK409LG) is compatible with standard AC wall dimmer switches. Application requirements determine which dimming method is appropriate.
Q: What is the impact of switching from through-hole to surface-mount packages?
A: Through-hole packages (LC5205D, LC5202D, LNK409LG) require PCB via holes and are suitable for manual assembly or wave soldering. Surface-mount packages (AL9910S-13, FL7701MX, HV98101T-E/CH, HV9921N8-G, LM3445M/NOPB, LM3497MMX/NOPB) require reflow soldering and different PCB layout. Package change necessitates complete PCB redesign and assembly process modification.
Q: Are all substitute parts RoHS compliant?
A: LC5205D, LC5202D, LNK409LG are RoHS Compliant. AL9910S-13, HV98101T-E/CH, HV9921N8-G, LM3445M/NOPB, and LM3497MMX/NOPB are ROHS3 Compliant. FL7701MX RoHS status is not specified in available data. Verify compliance requirements for your specific application and regulatory jurisdiction.
Q: Which substitute part has the widest operating temperature range?
A: LNK409LG operates from -40°C to 150°C (junction temperature), providing the widest temperature range. LC5205D and LC5202D operate to 105°C (ambient temperature). Temperature range selection depends on thermal environment and reliability requirements.
Q: Can parts with lower output current ratings substitute for the 400mA LC5205D?
A: No. HV9921N8-G is rated for 20mA output only and cannot handle 400mA applications. Output current rating must meet or exceed application requirements. Undersized current ratings result in component thermal stress and failure.
Q: What is the significance of internal switch presence?
A: Internal switch presence (LC5205D, LC5202D, HV9921N8-G, LNK409LG) simplifies external circuit design by eliminating the need for discrete power switch components. Parts without internal switches (AL9910S-13, FL7701MX, HV98101T-E/CH, LM3445M/NOPB, LM3497MMX/NOPB) require external switch implementation, increasing component count and PCB complexity.
Q: Is LNK409LG suitable for direct replacement despite flyback topology?
A: LNK409LG uses flyback topology instead of buck topology. While both are AC DC offline switchers, flyback topology requires different transformer design and control circuit implementation. Direct replacement is not possible without complete power stage redesign. LNK409LG is suitable only for new designs where flyback topology is acceptable.
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