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LM3402HVMM LED Driver IC Equivalent & Substitute Parts
Part Overview
The LM3402HVMM is a LED Driver IC from Texas Instruments designed for step-down (buck) topology DC-DC regulation with PWM dimming capability. This device delivers 500mA output current across a 6V to 75V input supply range, operating at 1MHz switching frequency for lighting applications. The main part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LM3402HVMM |
| Product Status | Obsolete |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Down (Buck) |
| Package | 8-VSSOP |
| Voltage Supply (Min) | 6V |
| Voltage Supply (Max) | 75V |
| Output Current | 500mA |
| Switching Frequency | 1MHz |
| Dimming | PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution for the LM3402HVMM is determined by the following critical parameters:
Primary Substitution Criteria:
- Topology: Step-Down (Buck) DC-DC regulator
- Dimming capability: PWM support
- Output current rating: 500mA or higher
- Input voltage range: Minimum 6V supply capability
- Switching frequency: 1MHz operation
- Package compatibility: Surface mount 8-pin configurations
Substitution Categories:
- Parametric Equivalents (Texas Instruments LM3402 Series) – Direct replacements with identical electrical specifications and active product status
- Manufacturer Recommended Alternatives – Cross-manufacturer solutions with comparable or enhanced specifications from Infineon, Lumissil, STMicroelectronics, and Analog Devices
Parameter Comparison
| Part Number | Manufacturer | Topology | Output Current | Supply Voltage (Min-Max) | Frequency | Dimming | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| LM3402HVMM | Texas Instruments | Step-Down (Buck) | 500mA | 6V - 75V | 1MHz | PWM | 8-VSSOP | Obsolete | Non-compliant |
| LM3402HVMM/NOPB | Texas Instruments | Step-Down (Buck) | 500mA | 6V - 75V | 1MHz | PWM | 8-VSSOP | Active | ROHS3 Compliant |
| LM3402HVMMX/NOPB | Texas Instruments | Step-Down (Buck) | 500mA | 6V - 75V | 1MHz | PWM | 8-VSSOP | Active | ROHS3 Compliant |
| ILD4071XUMA1 | Infineon Technologies | Step-Down (Buck) | 700mA | 5V - 40V | 50kHz - 300kHz | PWM | 8-DSO | Active | ROHS3 Compliant |
| IS31LT3350-V1STLS2-TR | Lumissil Microsystems | Step-Down (Buck) | 650mA (Switch) | 6V - 40V | 1MHz | Analog, PWM | SOT-23-5 | Active | ROHS3 Compliant |
| LED2001PHR | STMicroelectronics | Step-Down (Buck) | 4A | 3V - 18V | 850kHz | PWM | 8-HSOP | Active | ROHS3 Compliant |
| LED6000PHR | STMicroelectronics | Step-Down (Buck) | 3A | 4.5V - 61V | 250kHz - 1.5MHz | PWM | 16-HTSSOP | Active | ROHS3 Compliant |
| LT3519IMS-1#TRPBF | Analog Devices Inc. | SEPIC, Step-Down (Buck), Step-Up (Boost) | 750mA (Switch) | 3V - 30V | 1MHz | Analog, PWM | 16-MSOP | Active | ROHS3 Compliant |
| LT3956EUHE#TRPBF | Analog Devices Inc. | Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost) | 3.3A (Switch) | 4.5V - 80V | 100kHz - 1MHz | Analog, PWM | 36-QFN (5x6) | Active | ROHS3 Compliant |
| LTC3202EMS#PBF | Analog Devices Inc. | Switched Capacitor (Charge Pump) | 125mA | 2.7V - 4.5V | 1.5MHz | PWM | 10-MSOP | Active | ROHS3 Compliant |
| MAX16832AASA+T | Analog Devices Inc./Maxim Integrated | Step-Down (Buck) | 700mA | 6.5V - 65V | 2MHz | PWM | 8-SOIC-EP | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Replacement (Highest Compatibility):
LM3402HVMM/NOPB and LM3402HVMMX/NOPB are parametric equivalents with identical electrical specifications. Both are active products with ROHS3 compliance, addressing the obsolescence and regulatory status of the original part. These maintain the same 8-VSSOP package, 500mA output current, 6V-75V input range, and 1MHz operation.
Cross-Manufacturer Alternatives:
MAX16832AASA+T (Analog Devices/Maxim) provides the closest functional match outside the LM3402 series, maintaining step-down topology, PWM dimming, 700mA output capability, and 6.5V-65V input range in an 8-SOIC-EP package. Operating frequency increases to 2MHz.
LED6000PHR (STMicroelectronics) supports higher current delivery (3A) with extended input voltage range (4.5V-61V) and programmable frequency (250kHz-1.5MHz), suitable for higher-power lighting applications requiring the same PWM dimming control.
LT3956EUHE#TRPBF (Analog Devices) offers multi-topology flexibility (Flyback, SEPIC, Buck, Boost) with 3.3A switch current and 4.5V-80V input range, enabling broader application scope beyond simple buck regulation.
All recommended alternatives carry active product status and ROHS3 compliance, eliminating regulatory and supply chain risks associated with the obsolete original part.
Frequently Asked Questions (FAQ)
Q: Can LM3402HVMM/NOPB directly replace LM3402HVMM in existing designs?
A: Yes. LM3402HVMM/NOPB is a parametric equivalent with identical electrical specifications, operating temperature range, and package footprint. The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.
Q: What is the difference between LM3402HVMM/NOPB and LM3402HVMMX/NOPB?
A: Both are parametric equivalents with identical electrical performance. The difference lies in packaging designation and inventory availability. Selection depends on procurement requirements and supplier stock levels.
Q: Is MAX16832AASA+T compatible with LM3402HVMM designs?
A: MAX16832AASA+T maintains step-down topology, PWM dimming, and similar input voltage range (6.5V-65V vs. 6V-75V). Output current is higher (700mA vs. 500mA). The 8-SOIC-EP package differs from 8-VSSOP, requiring PCB layout modifications. Switching frequency increases to 2MHz. Circuit validation is recommended before implementation.
Q: Why would LED6000PHR be selected over direct LM3402 equivalents?
A: LED6000PHR delivers significantly higher current (3A vs. 500mA) and supports programmable frequency (250kHz-1.5MHz). Selection is appropriate for applications requiring higher power delivery or frequency optimization. The 16-HTSSOP package requires different PCB footprint design.
Q: Does LTC3202EMS#PBF work as a substitute for LM3402HVMM?
A: No. LTC3202EMS#PBF uses switched capacitor (charge pump) topology with 125mA output current and 2.7V-4.5V input range. These specifications are incompatible with the LM3402HVMM's buck topology, 500mA output, and 6V-75V input requirements. This part is unsuitable for direct substitution.
Q: What packaging considerations apply when switching from LM3402HVMM to alternative parts?
A: LM3402HVMM uses 8-VSSOP package. Direct equivalents (LM3402HVMM/NOPB, LM3402HVMMX/NOPB) maintain this footprint. Cross-manufacturer alternatives use different packages: MAX16832AASA+T (8-SOIC-EP), LED6000PHR (16-HTSSOP), LT3519IMS-1#TRPBF (16-MSOP), LT3956EUHE#TRPBF (36-QFN). PCB redesign is necessary for non-equivalent packages.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All recommended substitute parts carry ROHS3 compliance certification. The original LM3402HVMM is RoHS non-compliant, making compliant alternatives necessary for regulatory adherence in new designs.
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