Part A
IR2153S
компанией Infineon Technologies
- Lifecycle
- Active
- Stock
- 1966 ПКС
- Package
- SOIC-8
- Series
- PMIC - Драйверы ворот
Replacement verdict
Compatible functional replacement candidate
The IR2153S and IR21531STR are functionally equivalent self-oscillating half-bridge gate driver ICs from Infineon Technologies, sharing the same 600 V high-side floating supply, internal deadtime, and SOIC-8 package. The IR21531STR adds a shutdown feature that the IR2153S lacks, so the IR2153S can directly replace the IR21531STR only when the shutdown pin is left unused or tied to the enable state; the reverse substitution requires the shutdown function to be permanently disabled. Designers should verify the shutdown pin handling and confirm the UVLO threshold variant before committing to a drop-in replacement.
Package Type
High match
Output Drive Capability
High match
High-Side Floating Supply Voltage
High match
Shutdown Function
Validation required
Parts at a glance
Part B
IR21531STR
компанией Infineon Technologies
- Lifecycle
- Active
- Stock
- 6083 ПКС
- Package
- SOIC-8
- Series
- PMIC - Драйверы ворот
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | IR2153S | IR21531STR | Why it matters |
|---|---|---|---|
| Manufacturer | Infineon Technologies | Infineon Technologies | Same manufacturer ensures consistent quality and documentation. |
| Function | Self-Oscillating Half-Bridge Driver | Self-Oscillating Half-Bridge Driver | Identical core function means both can drive half-bridge topologies. |
| Package / Mounting | SOIC-8 (Surface Mount) | SOIC-8 (Surface Mount) | Same footprint allows drop-in PCB replacement without layout changes. |
| Supply Voltage (VCC) | 10 V to 20 V | 10 V to 20 V | Matching operating range ensures compatibility with the same bias supply. |
| Output Current (Source/Sink) | 210 mA / 420 mA | 210 mA / 420 mA | Equal drive strength determines gate charge switching capability. |
| Deadtime | 1.2 µs (typical) | 1.2 µs (typical) | Deadtime prevents shoot-through current in the half-bridge stage. |
| Oscillator Frequency | Programmable via RT/CT | Programmable via RT/CT | External programming allows tuning switching frequency for the application. |
| High-Side Floating Supply (VBS) | Up to 600 V | Up to 600 V | Determines maximum bus voltage the high-side driver can withstand. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same thermal range suits identical industrial and consumer environments. |
| Internal Bootstrap Diode | Yes | Yes | Integrated bootstrap diode simplifies high-side gate drive circuitry. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | IR2153S | IR21531STR |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Driven Configuration | Half-Bridge | Half-Bridge |
| Channel Type | Synchronous | Synchronous |
| Number of Drivers | 2 | 2 |
| Gate Type | N-Channel MOSFET | N-Channel MOSFET |
| Voltage - Supply | 10V ~ 15.6V | 10V ~ 15.6V |
| Input Type | RC Input Circuit | RC Input Circuit |
| High Side Voltage - Max(Bootstrap) | 600 V | 600 V |
| Rise / Fall Time(Typ) | 80ns, 45ns | 80ns, 45ns |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the IR2153S and IR21531STR?
The IR2153S and IR21531STR are self-oscillating half-bridge gate driver ICs from Infineon Technologies (formerly International Rectifier). Both integrate a high-voltage half-bridge driver with a programmable oscillator in a single package, intended for driving two N-channel MOSFETs or IGBTs in half-bridge configurations such as ballasts, SMPS, and motor drives.
What is the difference between the IR2153S and IR21531STR?
The IR2153S is supplied in an 8-lead SOIC package and is the base self-oscillating half-bridge driver. The IR21531STR is the same functional die supplied in an 8-lead SOIC package and delivered in tape-and-reel form for automated assembly. The "STR" suffix denotes tape-and-reel packaging; the core electrical function and pinout are equivalent.
Are the IR2153S and IR21531STR pin-compatible?
Yes. Both devices use the standard 8-lead SOIC pinout for the IR2153 family: VCC, RT, CT, COM, LO, VS, HO, and VB. Because the die and pinout are the same, they are pin-to-pin compatible when the package and packing option are acceptable for the target assembly process.
What are the key electrical specifications of these devices?
Both devices feature a 600 V maximum high-side offset voltage, a 15.6 V typical VCC undervoltage lockout, and a typical deadtime set by the external RT and CT components. The oscillator frequency is programmed by the external RT and CT network. Gate drive output current is typically 210 mA source and 420 mA sink. These parameters are common to the IR2153 family and are documented in the Infineon datasheet.
Can the IR2153S and IR21531STR be used interchangeably?
Yes, from an electrical and functional standpoint they are interchangeable because they share the same die and pinout. The only practical difference is the packing format: the IR21531STR is supplied in tape-and-reel, while the IR2153S is typically supplied in tubes or trays. The choice depends on the assembly line's feeder requirements.
What is the maximum operating voltage for the high-side driver?
The high-side offset voltage (VS) rating for both the IR2153S and IR21531STR is 600 V maximum. This allows the high-side gate driver to operate in half-bridge topologies with DC bus voltages up to 600 V, subject to proper bootstrap diode and capacitor selection and adherence to the datasheet's absolute maximum ratings.
What package type do these devices use?
Both the IR2153S and IR21531STR are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package. The SOIC-8 package is surface-mount and is suitable for automated pick-and-place assembly. The IR21531STR is specifically provided in tape-and-reel format for high-volume production.
What is the typical application for the IR2153S and IR21531STR?
Typical applications include electronic ballasts for fluorescent lamps, half-bridge converters in switch-mode power supplies, DC-AC inverters, and motor drive circuits. The self-oscillating architecture reduces external component count by integrating the oscillator and half-bridge driver in one IC.