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CS1615-FSZR LED Driver IC Equivalent & Substitute Parts
Part Overview
The CS1615-FSZR is an AC DC offline switcher LED driver IC manufactured by Cirrus Logic Inc., designed for lighting applications with Triac dimming capability. This device integrates a flyback, step-down (buck), and step-up (boost) topology in a 16-SOIC package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing.
Substiute Parts
Key Parameters
| Parameter | CS1615-FSZR |
|---|---|
| Manufacturer | Cirrus Logic Inc. |
| Category | Power Management (PMIC) |
| Type | AC DC Offline Switcher |
| Topology | Flyback, Step-Down (Buck), Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 11V |
| Voltage Supply (Max) | 17V |
| Frequency | 6kHz ~ 200kHz |
| Dimming | Triac |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution for the CS1615-FSZR is determined by the following critical parameters:
- Type & Topology: AC DC offline switcher with flyback, buck, and/or boost capability
- Dimming Method: Triac dimming support for lighting applications
- Supply Voltage Range: Compatibility within or overlapping the 11V–17V input range
- Package Compatibility: Surface mount packages suitable for PCB integration
- Operating Temperature: Support for -40°C to 125°C minimum
- Product Status: Active or available parts preferred over obsolete alternatives
The substitute parts listed below meet these criteria with varying degrees of parameter alignment. Selection depends on specific application requirements including package constraints, internal switch requirements, and thermal specifications.
Parameter Comparison
| Parameter | CS1615-FSZR | AL1692-20CS7-13 | AL1692S-13 | HVLED815PFTR | LYT3328D-TL | TPS92002DGKR | TPS92075DDCR/NOPB | TS19705CX6 RFG |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Cirrus Logic Inc. | Diodes Incorporated | Diodes Incorporated | STMicroelectronics | Power Integrations | Texas Instruments | Texas Instruments | Taiwan Semiconductor Corporation |
| 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 | Flyback, Buck, Boost | Flyback, Buck, Boost | Flyback, Buck, Boost | Flyback | Flyback, Buck, Boost | Flyback, Buck | Buck, Boost | Flyback, Buck, Boost |
| Internal Switch(s) | No | Yes | No | Yes | Yes | No | No | No |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 11V | 8.5V | 8.5V | 11.5V | 85VAC | — | 11V | 9.5V |
| Voltage Supply (Max) | 17V | 20V | 20V | 23V | 132VAC | 21V | 18V | 40V |
| Frequency | 6kHz ~ 200kHz | 4kHz | 4kHz | 166kHz | 40kHz ~ 124kHz | 100kHz | — | — |
| Dimming | Triac | Triac | Triac | PWM | Triac | Triac | Triac | — |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) |
| Package / Case | 16-SOIC | 7-SO | 8-SOIC | 16-SOIC | 16-SOIC | 8-TSSOP | SOT-23-6 | SOT-23-6 |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 2 (1 Year) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
AL1692S-13 (Diodes Incorporated) provides the closest functional match with active product status, ROHS3 compliance, and unlimited MSL rating. The 8-SOIC package differs from the original 16-SOIC, requiring PCB layout modification. Supply voltage range (8.5V–20V) encompasses the CS1615-FSZR specification.
LYT3328D-TL (Power Integrations) offers full topology compatibility (flyback, buck, boost) with Triac dimming in a 16-SOIC package matching the original footprint. Input specification differs (85VAC–132VAC) and requires verification for DC supply applications. Active product status and RoHS compliance support long-term availability.
TPS92075DDCR/NOPB (Texas Instruments) supports the original supply voltage range (11V–18V) with Triac dimming in a compact SOT-23-6 package. Topology excludes flyback capability, limiting application scope. Active status and unlimited MSL provide supply chain stability.
HVLED815PFTR (STMicroelectronics) operates within compatible voltage range (11.5V–23V) with internal switch integration. PWM dimming differs from Triac dimming, requiring application verification. 16-SOIC package matches original footprint. Active status and extended temperature range (-40°C to 150°C) support demanding environments.
TPS92002DGKR (Texas Instruments) supports Triac dimming with active product status. Maximum supply voltage (21V) exceeds the original specification. 8-VSSOP package requires layout redesign. Operating temperature limited to -40°C to 85°C.
AL1692-20CS7-13 (Diodes Incorporated) provides Triac dimming with internal switch and active status. 7-SO package significantly differs from original 16-SOIC, requiring substantial PCB modification. Lower frequency (4kHz) may impact application performance.
TS19705CX6 RFG (Taiwan Semiconductor Corporation) supports extended voltage range (9.5V–40V) with SOT-23-6 package. Dimming method unspecified. Operating temperature limited to -40°C to 85°C.
Frequently Asked Questions (FAQ)
Q: Can AL1692S-13 directly replace CS1615-FSZR without PCB modification?
A: No. AL1692S-13 uses an 8-SOIC package versus the original 16-SOIC. PCB layout changes are required. Electrical functionality is compatible within the specified voltage and topology parameters.
Q: Why does LYT3328D-TL specify 85VAC–132VAC input instead of DC voltage?
A: LYT3328D-TL is designed for direct AC mains input applications. Verification is required to confirm compatibility with DC supply designs using the CS1615-FSZR.
Q: What is the difference between Triac and PWM dimming?
A: Triac dimming uses phase-cut control of AC mains voltage for brightness adjustment. PWM dimming uses pulse-width modulation of the output signal. Application circuits differ; direct substitution requires dimming method compatibility.
Q: Is HVLED815PFTR suitable for applications requiring flyback topology?
A: HVLED815PFTR supports only flyback topology, not buck or boost. If the original design requires buck or boost capability, this part may not be suitable without circuit redesign.
Q: What does MSL rating mean for component substitution?
A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to moisture before soldering. MSL 1 (unlimited) provides greater flexibility in storage and handling compared to MSL 3 (168 hours). Lower MSL ratings reduce risk of solder joint defects.
Q: Can TPS92075DDCR/NOPB replace CS1615-FSZR in all applications?
A: TPS92075DDCR/NOPB lacks flyback topology support, limiting it to buck and boost applications. Verify that your design does not require flyback functionality before substitution.
Q: Which substitute offers the best long-term availability?
A: All listed substitutes have active product status. AL1692S-13 has the highest inventory (120,100 pcs) and unlimited MSL rating, supporting extended supply chain stability.
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