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IR4426 Low-Side Gate Driver IC - Equivalent & Substitute Parts
Part Overview
The IR4426 is a low-side gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET applications. This component operates with a supply voltage range of 6V to 20V and delivers peak output currents of 2.3A (source) and 3.3A (sink) with inverting input configuration. The IR4426 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across driven configuration, channel type, gate type support, and package form factor while meeting or exceeding the electrical performance specifications.
Substiute Parts
Key Parameters
| Parameter | IR4426 Specification |
|---|---|
| Driven Configuration | Low-Side |
| Channel Type | Independent |
| Number of Drivers | 2 |
| Gate Type | IGBT, N-Channel MOSFET |
| Voltage - Supply | 6V ~ 20V |
| Logic Voltage - VIL, VIH | 0.8V, 2.7V |
| Current - Peak Output (Source, Sink) | 2.3A, 3.3A |
| Input Type | Inverting |
| Rise / Fall Time (Typ) | 15ns, 10ns |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the IR4426 are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following mandatory parameters:
- Driven Configuration: Low-Side only
- Channel Type: Independent
- Number of Drivers: 2
- Input Type: Inverting
- Mounting Type: Through Hole
- Package / Case: 8-DIP (0.300", 7.62mm)
Additional compatibility is determined by:
- Gate Type Support: Must support IGBT and/or N-Channel MOSFET
- Voltage - Supply: Must encompass or exceed the 6V ~ 20V range
- Logic Voltage Thresholds: VIL and VIH must be compatible with 0.8V and 2.7V respectively
- Current - Peak Output: Source and sink currents must meet or exceed 2.3A and 3.3A
- Operating Temperature: Must support -40°C ~ 150°C range or equivalent industrial grade
- Rise / Fall Time: Performance should be comparable or superior to 15ns rise and 10ns fall
Substitute parts are grouped into two categories: direct equivalents (IR4426PBF) and functional alternatives that meet all mandatory parameters while offering enhanced or equivalent electrical performance.
Parameter Comparison
| Parameter | IR4426 | IR4426PBF | IXDI602PI | MAX4426CPA+ | MAX4426EPA+ | MAX626CPA+ | MAX626EPA+ | MCP1403-E/P | MIC4423YN | MIC4423ZN | MIC4426YN |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Driven Configuration | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side |
| Channel Type | Independent | Independent | Independent | Independent | Independent | Independent | Independent | Independent | Independent | Independent | Independent |
| Number of Drivers | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Gate Type | IGBT, N-Channel MOSFET | IGBT, N-Channel MOSFET | IGBT, N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | IGBT, N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET | N-Channel, P-Channel MOSFET |
| Voltage - Supply | 6V ~ 20V | 6V ~ 20V | 4.5V ~ 35V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V | 4.5V ~ 18V |
| Logic Voltage - VIL, VIH | 0.8V, 2.7V | 0.8V, 2.7V | 0.8V, 3V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V | 0.8V, 2.4V |
| Current - Peak Output (Source, Sink) | 2.3A, 3.3A | 2.3A, 3.3A | 2A, 2A | 1.5A, 1.5A | 1.5A, 1.5A | 2A, 2A | 2A, 2A | 4.5A, 4.5A | 3A, 3A | 3A, 3A | 1.5A, 1.5A |
| Input Type | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting |
| Rise / Fall Time (Typ) | 15ns, 10ns | 15ns, 10ns | 7.5ns, 6.5ns | 20ns, 20ns | 20ns, 20ns | 25ns, 20ns | 25ns, 20ns | 15ns, 18ns | 28ns, 32ns | 28ns, 32ns | 20ns, 29ns |
| Operating Temperature | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | 0°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Equivalent:
IR4426PBF is the direct equivalent to IR4426, manufactured by International Rectifier (now part of Infineon Technologies). This part maintains identical electrical specifications and package form factor. IR4426PBF carries active product status with 28,700 units in stock, providing immediate availability for replacement applications.
Primary Substitutes for Active Production:
MCP1403-E/P (Microchip Technology) and MIC4423YN (Microchip Technology) are recommended as primary substitutes. Both parts are ROHS3 compliant and carry active product status. MCP1403-E/P delivers superior peak output current (4.5A source/sink) and supports IGBT gate types, maintaining full compatibility with the original IR4426 specification. MIC4423YN provides 3A peak output current with extended temperature range support (-40°C ~ 150°C TJ).
Secondary Substitutes:
IXDI602PI (IXYS Integrated Circuits Division) offers extended supply voltage range (4.5V ~ 35V) and superior rise/fall time performance (7.5ns/6.5ns). This part is suitable for applications requiring wider input voltage tolerance.
MAX4426EPA+ and MAX626EPA+ (Analog Devices Inc./Maxim Integrated) are suitable for applications operating within -40°C ~ 85°C temperature range. MAX626EPA+ provides 2A peak output current matching the IR4426 sink current specification.
Compliance Considerations:
All recommended substitutes carry ROHS3 compliance status, addressing environmental regulatory requirements. The original IR4426 is RoHS non-compliant; substitution enables compliance with current environmental standards. All substitute parts maintain REACH unaffected status and EAR99 export classification consistent with the original component.
Frequently Asked Questions (FAQ)
Q: Can IR4426PBF be used as a direct replacement for IR4426?
A: Yes. IR4426PBF is the direct equivalent with identical electrical specifications, package form factor, and pin configuration. The primary difference is product status: IR4426PBF is active while IR4426 is obsolete.
Q: What are the minimum peak output current requirements for substitution?
A: The IR4426 specifies 2.3A source and 3.3A sink current. Substitute parts must deliver at least these current levels. MCP1403-E/P (4.5A/4.5A), MIC4423YN (3A/3A), and MAX626EPA+ (2A/2A) meet or exceed these requirements. MAX4426CPA+ and MAX4426EPA+ deliver 1.5A/1.5A, which falls below the sink current specification and is not recommended.
Q: Are all substitute parts RoHS compliant?
A: All recommended substitute parts carry ROHS3 compliance certification. The original IR4426 is RoHS non-compliant. Substitution with any recommended part enables compliance with current environmental regulations.
Q: What is the significance of operating temperature range differences?
A: The IR4426 operates across -40°C ~ 150°C (junction temperature). MCP1403-E/P, MIC4423YN, MIC4423ZN, and MIC4426YN maintain this full temperature range. MAX4426CPA+ and MAX626CPA+ are limited to 0°C ~ 70°C (ambient temperature), suitable only for controlled environment applications. MAX4426EPA+ and MAX626EPA+ support -40°C ~ 85°C (ambient temperature), providing extended low-temperature operation but reduced high-temperature capability.
Q: Can substitute parts with lower peak output current be used?
A: No. The IR4426 sink current specification of 3.3A is a minimum requirement. Parts delivering less than 3.3A sink current (such as MAX4426CPA+ and MAX4426EPA+ at 1.5A) cannot reliably drive the same gate loads and are not suitable substitutes.
Q: What is the impact of rise/fall time differences?
A: The IR4426 specifies 15ns rise and 10ns fall time. Faster switching (IXDI602PI at 7.5ns/6.5ns) reduces switching losses and EMI but requires careful PCB layout. Slower switching (MIC4423YN at 28ns/32ns) increases switching losses but may reduce EMI in sensitive applications. Rise/fall time differences do not prevent substitution but affect system performance characteristics.
Q: Are all substitute parts available in 8-DIP through-hole package?
A: Yes. All substitute parts listed are available in 8-DIP (0.300", 7.62mm) through-hole package, maintaining mechanical compatibility with existing PCB designs.
Q: What supply voltage range is acceptable for substitution?
A: The IR4426 operates from 6V ~ 20V. All substitute parts operate from 4.5V ~ 18V or wider ranges, encompassing the original specification. IXDI602PI extends to 4.5V ~ 35V, providing additional flexibility for applications requiring higher supply voltages.
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