International Rectifier IR2155PBF
Full Technical Specifications
13 Parameters| Parameter / Attribute | Specification / Value |
|---|---|
| Gate type | IGBT, N-Channel MOSFET |
| Input type | RC Input Circuit |
| Channel type | Synchronous |
| Mounting | Through Hole |
| Supply voltage | 10V ~ 20V |
| High side voltage - max (Bootstrap) | 600 V |
| Current - peak output (Source, sink) | 250mA, 500mA |
| Operating temperature | -40°C~125°C(TA) |
| Package | Bulk |
| Case | 8-DIP (0.300\", 7.62mm) |
| Number of drivers | 2 |
| Driven configuration | Half-Bridge |
| Rise (Fall time) | 80ns, 45ns |
Need Stock or a Drop-in Second-Source for IR2155PBF?
Package: DIP-8 / SOIC-8 · Pin-compatible replacements with immediate Shenzhen spot stock
This 8-pin family is the beating heart of compact fluorescent and LED ballasts, small inverters and induction heaters: a 600V half-bridge driver with its own 555-style RC oscillator, fixed 50 percent duty and internal deadtime - the entire controller for a resonant circuit in one chip. The generations read in order: IR2151 and IR2155 were the originals, IR2153 is the improved version with a real shutdown feature on the CT pin, micropower startup and tighter deadtime, and IR2153D folds in the bootstrap diode that the bare parts need externally. The substitution story is friendly - the 2153 upgrades the earlier parts in the same socket - but the oscillator timing components are the design, and repairs that keep the chip while ignoring the RT/CT network re-fail by design.
Verified Pin-Compatible Replacements (3 verified alternatives)
The Same Chip with the Diode Brought Inside
Shenzhen Spot Stock (24-48h Dispatch)
Identical driver to the IR2153 with the bootstrap diode integrated - the D suffix removes one external component and one layout concern from every design.
Same 600V half-bridge class, 15.6V VCC clamp and micropower startup.
The Original, Stronger Gate Drive
Shenzhen Spot Stock (24-48h Dispatch)
The earlier generation with the strongest output stage of the row (1000pF load at 80/40ns class) but none of the 2153s refinements: no CT-pin shutdown, coarser deadtime control, no VCC clamp.
Same 600V class; without the clamp the supply design carries what the 2153 absorbed.
The Modern Orderable
Shenzhen Spot Stock (24-48h Dispatch)
The current-recommended version of the same function: integrated bootstrap diode, updated process, documentation for new designs.
Same envelope with the refinements of the successor line.
Buyer & Quality Checklist for Sourcing Alternatives
- The RT/CT network is the whole controller: oscillator frequency, deadtime behavior and startup all flow from those two components. A repair that changes the chip without checking the timing components has replaced the messenger, not the message.
- Deadtime is internal and fixed (about 1.2us on the 8-pin family): circuits that needed different deadtime used a different, programmable family (IR2157 class) - do not expect the socket to provide it.
- The IR2153 shutdown rides on the CT pin (below about one sixth of VCC): circuits that abuse that pin for a soft start or a dimmer input are leaning on a feature the older parts did not have.
- IR2153D versus IR2153: the D brings the bootstrap diode inside. Boards designed for the bare part tolerate the D; boards designed for the D need the external diode if only the bare part is fitted.
- In ballast repair, the chip is often the last casualty: the resonant capacitor, the lamp/load and the gate resistors die first. Meter the passives before fitting the third driver into the same board.
- The 600V class assumes the bus stays inside it: the electrolytic and the inrush path define the actual transient at the half-bridge - check them when a driver dies at switch-on.
Frequently Asked Technical Questions
Q: What is the difference between IR2153 and IR2155?
A: Generation and features, not fit: same 8-pin socket and 600V class, but the 2153 adds CT-pin shutdown, micropower startup, a VCC clamp and tighter deadtime, while the 2155 has the stronger gate drive of the early row.
Q: Can IR2153 replace IR2151 or IR2155?
A: Yes - it is the documented upgrade with the same pinout and function, adding protections the older parts lacked. Keep the oscillator timing components of the original design; the chip is the controller but the RC network is the design.
Q: Is IR2153D different from IR2153?
A: Only the bootstrap diode: the D integrates it. Both directions of substitution work - the D in a bare socket leaves the external diode harmlessly redundant; the bare part in a D socket needs that external diode fitted.