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ZXLD1356DACTC LED Driver IC Equivalent & Substitute Parts
Part Overview
The ZXLD1356DACTC is an active LED driver IC manufactured by Diodes Incorporated, classified as a Power Management (PMIC) device. This step-down (buck) topology regulator with PWM dimming capability is designed for lighting and signage applications, operating across a 6V to 60V supply range with 550mA output current capacity. The device is AEC-Q100 qualified for automotive applications and maintains active product status with 17,300 units in current inventory. Substitute parts are identified to address application requirements including alternative packaging formats, higher current capabilities, extended voltage ranges, or specific thermal performance needs.
Substiute Parts
Key Parameters
| Parameter | ZXLD1356DACTC |
|---|---|
| Manufacturer | Diodes Incorporated |
| Type | DC DC Regulator (Step-Down Buck) |
| Topology | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 6V |
| Voltage Supply (Max) | 60V |
| Voltage Output | 60V |
| Current Output / Channel | 550mA |
| Frequency | 500kHz |
| Dimming | PWM |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 6-VDFN Exposed Pad |
| Mounting Type | Surface Mount |
| Grade | Automotive |
| Qualification | AEC-Q100 |
| RoHS Status | ROHS3 Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the ZXLD1356DACTC are selected based on functional equivalence within the LED driver IC category. The primary substitution criteria are:
Core Electrical Parameters:
- DC DC Regulator topology with step-down (buck) configuration
- Single output channel
- PWM dimming capability
- Supply voltage range compatibility (minimum 6V input support)
- Output current rating (550mA baseline; higher ratings acceptable for design margin)
- Switching frequency in the 250kHz to 1.5MHz range
Mechanical & Environmental Criteria:
- Surface mount packaging (various case styles acceptable)
- Operating temperature range of -40°C minimum and 125°C or higher maximum
- RoHS3 compliance
- Active product status
Compliance & Qualification:
- AEC-Q100 automotive qualification preferred but not mandatory for all substitutes
- MSL rating of 3 or lower acceptable
Substitutes are grouped by current capability and voltage rating to facilitate selection based on specific application headroom requirements.
Parameter Comparison
| Part Number | Manufacturer | Topology | Voltage Supply (Min-Max) | Current Output | Frequency | Dimming | Package | Temp Range | AEC-Q100 |
|---|---|---|---|---|---|---|---|---|---|
| ZXLD1356DACTC | Diodes Inc. | Step-Down (Buck) | 6V - 60V | 550mA | 500kHz | PWM | 6-VDFN | -40°C ~ 125°C | Yes |
| IS31LT3350-V1STLS2-TR | Lumissil Microsystems | Step-Down (Buck) | 6V - 40V | 650mA (Switch) | 1MHz | Analog, PWM | SOT-23-5 | -40°C ~ 85°C | No |
| LED6000PHR | STMicroelectronics | Step-Down (Buck) | 4.5V - 61V | 3A | 250kHz ~ 1.5MHz | PWM | 16-HTSSOP | -40°C ~ 150°C | No |
| LM3402MM/NOPB | Texas Instruments | Step-Down (Buck) | 6V - 42V | 500mA | 1MHz | PWM | 8-VSSOP | -40°C ~ 125°C | No |
| LM3402MR/NOPB | Texas Instruments | Step-Down (Buck) | 6V - 42V | 500mA | 1MHz | PWM | 8-SO PowerPad | -40°C ~ 125°C | No |
| LM3404HVMAX/NOPB | Texas Instruments | Step-Down (Buck) | 6V - 75V | 1A | 1MHz | PWM | 8-SOIC | -40°C ~ 125°C | Yes |
| LM3404MR/NOPB | Texas Instruments | Step-Down (Buck) | 6V - 42V | 1A | 1MHz | PWM | 8-SO PowerPad | -40°C ~ 125°C | Yes |
| LM3406HVMH/NOPB | Texas Instruments | Step-Down (Buck) | 6V - 75V | 1.5A | 10kHz ~ 1MHz | PWM | 14-HTSSOP | -40°C ~ 125°C | Yes |
| LM3407MY/NOPB | Texas Instruments | Step-Down (Buck) | 4.5V - 30V | 350mA | 300kHz ~ 1MHz | PWM | 8-HVSSOP | -40°C ~ 125°C | No |
| LM3414MRX/NOPB | Texas Instruments | Step-Down (Buck) | 4.5V - 42V | 1A | 500kHz | Analog, PWM | 8-SO PowerPad | -40°C ~ 125°C | Yes |
| LT3474IFE-1#PBF | Analog Devices Inc. | Step-Down (Buck) | 4.6V - 36V | 1A | 200kHz ~ 2MHz | PWM | 16-TSSOP-EP | -40°C ~ 125°C | Yes |
Engineering Selection Recommendations
For Direct Electrical Equivalence (550mA Output Current, 6V Minimum Supply):
LM3402MM/NOPB and LM3402MR/NOPB maintain the closest electrical match to the ZXLD1356DACTC with 500mA output current and identical operating temperature range. Both are manufactured by Texas Instruments with active product status and RoHS3 compliance. The primary trade-off is reduced maximum supply voltage (42V versus 60V) and different packaging formats. These are suitable for applications where the 60V maximum supply is not required.
For Extended Voltage Range (6V to 60V+ Supply):
LM3404HVMAX/NOPB and LM3406HVMH/NOPB support higher maximum supply voltages (75V) with AEC-Q100 automotive qualification matching the original part. LM3404HVMAX/NOPB provides 1A output current in 8-SOIC packaging, while LM3406HVMH/NOPB delivers 1.5A in 14-HTSSOP packaging. Both maintain -40°C to 125°C operating temperature and active product status. These are appropriate for designs requiring higher input voltage headroom or increased output current capacity.
For High Current Applications (3A Output):
LED6000PHR from STMicroelectronics offers 3A output current with extended temperature range (-40°C to 150°C) and supports 4.5V to 61V supply voltage. This device is suitable for higher power LED driver applications where the 550mA baseline is insufficient. Active product status and RoHS3 compliance are confirmed.
For Compact Packaging with Dual Dimming (Analog + PWM):
IS31LT3350-V1STLS2-TR provides both analog and PWM dimming in SOT-23-5 package with 650mA switch current. Supply range is 6V to 40V with 1MHz switching frequency. This option is appropriate for space-constrained designs requiring flexible dimming control, though maximum supply voltage is reduced to 40V.
For Automotive-Qualified Alternatives:
LM3404HVMAX/NOPB, LM3404MR/NOPB, LM3406HVMH/NOPB, LM3414MRX/NOPB, and LT3474IFE-1#PBF all carry AEC-Q100 automotive qualification. These are preferred for automotive lighting and signage applications where qualification status is a design requirement.
Frequently Asked Questions (FAQ)
Q: Can IS31LT3350-V1STLS2-TR replace ZXLD1356DACTC in a 60V input application?
A: No. IS31LT3350-V1STLS2-TR maximum supply voltage is 40V, which is insufficient for applications requiring the full 6V to 60V input range of the ZXLD1356DACTC. Use LM3404HVMAX/NOPB or LM3406HVMH/NOPB for 60V+ supply compatibility.
Q: What is the difference between LM3402MM/NOPB and LM3402MR/NOPB?
A: Both devices are electrically identical with 500mA output current, 6V to 42V supply range, and 1MHz switching frequency. The primary difference is packaging: LM3402MM/NOPB uses 8-VSSOP in tape & reel format, while LM3402MR/NOPB uses 8-SO PowerPad in tube format. MSL rating differs (1 versus 3), affecting moisture sensitivity handling requirements.
Q: Is AEC-Q100 qualification mandatory for LED driver substitution?
A: AEC-Q100 qualification is not mandatory for all applications. It is required for automotive-grade designs and recommended for high-reliability lighting systems. Non-qualified substitutes (IS31LT3350-V1STLS2-TR, LED6000PHR, LM3402 series, LM3407MY/NOPB) are acceptable for non-automotive lighting and signage applications where automotive qualification is not specified.
Q: Can LM3407MY/NOPB be used as a direct substitute?
A: LM3407MY/NOPB is not a direct substitute due to reduced maximum supply voltage (30V versus 60V) and lower output current (350mA versus 550mA). It is suitable only for applications with supply voltages below 30V and current requirements below 350mA.
Q: What packaging considerations apply when switching from 6-VDFN to alternative packages?
A: Package selection affects PCB layout, thermal management, and assembly compatibility. Larger packages (8-SOIC, 14-HTSSOP, 16-TSSOP) provide improved thermal dissipation and easier hand assembly but require larger PCB footprints. Smaller packages (SOT-23-5) minimize board space but may require automated assembly. Verify PCB design compatibility and thermal requirements before package substitution.
Q: Does switching frequency affect circuit design when substituting parts?
A: Yes. The ZXLD1356DACTC operates at 500kHz, while most substitutes operate at 1MHz or higher. Higher switching frequencies reduce output filter component size but increase EMI considerations. Circuit design, particularly output filter inductance and capacitance values, may require adjustment. Consult device datasheets for recommended filter component specifications.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain RoHS3 compliance status, matching the environmental compliance requirement of the ZXLD1356DACTC.
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