Request Quote
(Ships tomorrow)
A6276ELW LED Driver IC Equivalent & Substitute Parts
Part Overview
The A6276ELW is a linear LED driver IC manufactured by Allegro MicroSystems, designed for 16-output shift register applications with 75.5mA per-channel output capability. This device operates within a 4.5V to 5.5V supply range and is packaged in a 24-SOIC format. The A6276ELW is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across 16 output channels, shift register topology, and comparable electrical performance within acceptable parameter ranges.
Substiute Parts
Key Parameters
| Parameter | A6276ELW |
|---|---|
| Manufacturer | Allegro MicroSystems |
| Category | Power Management (PMIC) |
| Type | Linear |
| Topology | Shift Register |
| Number of Outputs | 16 |
| Voltage - Supply (Min) | 4.5V |
| Voltage - Supply (Max) | 5.5V |
| Voltage - Output | 4V |
| Current - Output / Channel | 75.5mA |
| Frequency | 20MHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitute parts for the A6276ELW are selected based on the following critical parameters that determine functional compatibility:
Primary Compatibility Criteria:
- 16 output channels (mandatory)
- Linear driver topology with shift register configuration
- Internal switch capability
- Operating temperature range of -40°C to 85°C minimum
- Supply voltage range encompassing 4.5V to 5.5V
- Per-channel output current capability of 75.5mA or greater
Secondary Considerations:
- Package form factor (surface mount preferred for design continuity)
- RoHS compliance status (ROHS3 compliant substitutes recommended for new designs)
- Frequency specification (10MHz to 35MHz acceptable range)
- Output voltage rating (minimum 4V required)
Substitutes are grouped by their ability to meet these criteria while offering improved product status (active vs. obsolete) and enhanced compliance certifications.
Parameter Comparison
| Parameter | A6276ELW | PCA9955TW/Q900,118 | STP16CPPS05XTTR | TLC5920DL | TLC5927QPWPRQ1 | TLC59281DBQR | TLC59282RGET | TLC59284DBQ | TLC5941PWPR |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Allegro MicroSystems | NXP USA Inc. | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Outputs | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Type | Linear | Linear | Linear | Linear | Linear | Linear | Linear | Linear | Linear |
| Topology | Shift Register | PWM | Shift Register | Shift Register | Shift Register | Shift Register | Shift Register | Shift Register | Shift Register |
| Internal Switch(s) | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes |
| Voltage - Supply (Min) | 4.5V | 3V | 3V | 4.5V | 3V | 3V | 3V | 3V | 3V |
| Voltage - Supply (Max) | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V | 5.5V |
| Voltage - Output | 4V | 40V | 20V | — | 17V | 17V | 17V | 10V | 17V |
| Current - Output / Channel | 75.5mA | 57mA | 40mA | 30mA | 120mA | 35mA | 45mA | 45mA | 80mA |
| Frequency | 20MHz | — | 30MHz | 10MHz | 30MHz | 35MHz | 35MHz | — | — |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | -20°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 24-SOIC | 28-TSSOP | 24-TSSOP-EP | 48-BSSOP | 24-PowerTSSOP | 24-SSOP | 24-VFQFN | 24-SSOP | 28-PowerTSSOP |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute - TLC5941PWPR (Texas Instruments)
The TLC5941PWPR is the most direct functional equivalent. It maintains 16 shift register outputs with 80mA per-channel capability, exceeding the A6276ELW's 75.5mA specification. Supply voltage range (3V to 5.5V) encompasses the original 4.5V to 5.5V requirement. The device is active in production status with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original part. The 28-PowerTSSOP package provides thermal performance advantages over the 24-SOIC format.
Secondary Substitute - TLC5927QPWPRQ1 (Texas Instruments)
The TLC5927QPWPRQ1 offers 120mA per-channel output current with shift register topology and internal switches. It meets the -40°C to 85°C operating temperature range and provides 3V to 5.5V supply compatibility. This device carries AEC-Q100 automotive qualification and ROHS3 compliance. The 24-PowerTSSOP package maintains closer form factor similarity to the original 24-SOIC, though with different pin pitch.
Alternative Substitute - STP16CPPS05XTTR (STMicroelectronics)
The STP16CPPS05XTTR provides shift register topology with 40mA per-channel output and extended operating temperature range (-40°C to 125°C). While output current is lower than the original specification, it maintains 16 channels and internal switch capability. ROHS3 compliance and active product status support long-term availability. The 24-TSSOP-EP package offers thermal management through exposed pad design.
Lower Current Alternative - TLC59281DBQR (Texas Instruments)
The TLC59281DBQR delivers 35mA per-channel output with shift register configuration and internal switches. This device is suitable for applications where output current requirements are less demanding than the original 75.5mA specification. It provides ROHS3 compliance, active status, and -40°C to 85°C operating range. The 24-SSOP package maintains compact form factor.
All recommended substitutes are active products with ROHS3 compliance, ensuring regulatory compliance and long-term supply chain stability compared to the obsolete A6276ELW.
Frequently Asked Questions (FAQ)
Q: Can the TLC5941PWPR directly replace the A6276ELW without circuit modifications?
A: The TLC5941PWPR maintains functional compatibility as a 16-output linear shift register driver with internal switches. However, package differences (28-PowerTSSOP vs. 24-SOIC) require PCB layout changes. The higher per-channel current capability (80mA vs. 75.5mA) and expanded supply voltage range (3V minimum vs. 4.5V minimum) are compatible with existing designs. Pin-to-pin compatibility must be verified against specific application schematics.
Q: What is the significance of the shift register topology in substitute selection?
A: Shift register topology enables serial data input with parallel output control, allowing multiple LED channels to be driven from a single data line. All recommended substitutes maintain this topology, ensuring compatibility with existing control interfaces and firmware. Devices with alternative topologies (such as PWM-based drivers) would require software and hardware modifications.
Q: Why do some substitutes have lower per-channel current ratings than the A6276ELW?
A: Lower current ratings (such as TLC59281DBQR at 35mA) are suitable for applications where LED brightness requirements or load impedance do not demand the full 75.5mA specification. These devices provide cost and thermal management advantages while maintaining 16-channel functionality. Application-specific current requirements must be evaluated before selection.
Q: How does package selection affect substitute compatibility?
A: Package differences require PCB redesign. The A6276ELW uses 24-SOIC (0.295" width), while substitutes employ 24-SSOP, 24-TSSOP, 24-VFQFN, 28-TSSOP, or 28-PowerTSSOP formats. Smaller pitch packages (SSOP, TSSOP, VFQFN) offer higher density but require finer PCB trace routing. PowerTSSOP variants include exposed thermal pads for improved heat dissipation. Package selection depends on available PCB real estate and thermal requirements.
Q: What is the importance of RoHS3 compliance in substitute selection?
A: RoHS3 compliance ensures the device meets current environmental and regulatory standards for hazardous substance restrictions. The A6276ELW is RoHS non-compliant, limiting its use in regulated markets and future-proofing concerns. All recommended substitutes are ROHS3 compliant, supporting compliance with EU directives and customer requirements for new designs.
Q: Can substitutes with extended temperature ranges (such as STP16CPPS05XTTR at -40°C to 125°C) be used in standard applications?
A: Extended temperature range devices are fully compatible with standard -40°C to 85°C applications. The broader operating range provides design margin and supports use in industrial or automotive environments with more demanding thermal conditions. No circuit modifications are required; extended range is a performance advantage with no compatibility penalties.
Q: How should output voltage ratings be evaluated when selecting a substitute?
A: Output voltage rating indicates the maximum voltage the driver can sustain at its output pins. The A6276ELW specifies 4V output voltage, while substitutes range from 10V to 40V. Higher output voltage ratings provide greater design flexibility for different LED configurations and load impedances. The substitute's output voltage rating must equal or exceed the application's maximum LED forward voltage plus any series resistor voltage drop.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts