Features: • 200 V (IRS2540) and 600 V (IRS2541) half bridge driver• Micropower startup (<500 A)• ±2% voltage reference• 140 ns deadtime• 15.6 V zener clamp on VCC• Frequency up to 500 kHz• Auto restart, non-latched shutdown• PWM dimmable• Sm...
IRS254PbF: Features: • 200 V (IRS2540) and 600 V (IRS2541) half bridge driver• Micropower startup (<500 A)• ±2% voltage reference• 140 ns deadtime• 15.6 V zener clamp on VCC...
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Features: • Floating channel designed for bootstrap operation• Fully operational to +2...
Symbol | Definition | Min. | Max. | Units |
VB | High-side floating supply voltage IRS2540 IRS2541 |
-0.3 | 225 625 |
V |
VS | High-side floating supply offset voltage | VB 25 | VB + 0.3 | v |
VHO | High-side floating output voltage | VS 0.3 | VB + 0.3 | V |
VLO | Low-side output voltage | -0.3 | VCC + 0.3 | V |
VIFB | Feedback voltage | -0.3 | VCC + 0.3 | V |
VENN | Enable voltage | -0.3 | VCC + 0.3 | V |
ICC | Supply current (Note 1) | -20 | 20 | mA |
dV/dt | Allowable offset voltage slew rate | -50 | 50 | V/ns |
PD | Package power dissipation @ TA +25 ºC PD = (TJMAX-TA)/RTHJA (8-Pin DIP) (8-Pin SOIC) |
1 0.625 |
W | |
RTHJA | Thermal resistance, junction to ambient (8-Pin DIP) (8-Pin SOIC) |
125 200 |
ºC/W | |
TJ | Junction temperature | -55 | 150 | ºC |
TS | Storage temperature | -55 | 150 | ºC |
TL | Lead temperature (soldering, 10 seconds) | 300 | ºC |
Note 1: This IC contains a zener clamp structure between the chip VCC and COM, with a nominal breakdown voltage of
15.6 V. Please note that this supply pin should not be driven by a low impedance DC power source greater than VCLAMP specified in the electrical characteristics section.
The IRS254(0,1) are high voltage, high frequency buck control ICs for constant LED current regulation. They incorporate a continuous mode time-delayed hysteretic buck regulator to directly control the average load current, using an accurate on-chip bandgap voltage reference.
The application is inherently protected against short circuit conditions, with the ability to easily add opencircuit protection. An external high-side bootstrap circuit drives the buck switching element at high frequencies. A low-side driver is also provided for synchronous rectifier designs. All functions are realized within a simple 8 pin DIP or SOIC package.