IRS27951S IRS27952(4)S - International Rectifier

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IRS27951S IRS27952(4)S Description The IRS2795(1,2)(4) is a self oscillating half-bridge driver IC for DC-DC resonant converter applications, especially the LLC resonant half-bridge converter. The frequency and dead time can be programmed externally using two external components. The IC offers over current protection using the on state resistance of the low-side MOSFET. The IC can be disabled by externally pulling the voltage at the CT/SD pin below its enable voltage threshold 4 www.irf.com © 2012 International Rectifier November 8 th , 2012
IRS27951S IRS27952(4)S Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal resistance and power dissipation ratings are measured under board mounted and still air conditions. Symbol Definition Min. Max. Units V CC Supply Voltage -0.3 25 V B High-side Floating Supply Voltage -0.3 625 V S High-side Floating Supply Offset Voltage V B – 25 V B + 0.3 V HO High-side Floating Output Voltage V S – 0.3 V B + 0.3 V V LO Low-side Output Voltage -0.3 V CC + 0.3 V CT CT/SD Pin Voltage -0.3 V CC + 0.3 V RT RT Pin Voltage -0.3 V CC + 0.3 I RT RT pin source current --- 2 mA dV s /dt Allowable offset voltage slew rate -50 50 V/ns T J Operating Junction Temperature -40 150 T S Storage Temperature -55 150 °C P D Package power dissipation @ TA ≤ (8 lead SOIC) — 0.833 25°C (14 lead SOIC) — 1.04 W Rth JA Thermal resistance, junction to (8 lead SOIC) — 150 ambient (14 lead SOIC) — 120 °C/W Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol Definition Min. Max. Units V BS High-side floating supply voltage 10 Vcc V S Steady-state high-side floating supply offset voltage -3.0 † 600 V V CC Supply voltage 12 18 fsw Switching Frequency --- 500 kHz † Care should be taken to avoid output switching conditions where the VS node flies inductively below ground by more than 5 V. Recommended Component Values Symbol Component Min. Max. Units R RT RT pin resistor value 2 100 kΩ C CT CT pin capacitor value 200 2000 pF 5 www.irf.com © 2012 International Rectifier November 8 th , 2012
Page 1 and 2: IRS27951S IRS27952(4)S RESONANT HAL
Page 3: Table of Contents IRS27951S IRS2795
Page 7 and 8: IRS27951S IRS27952(4)S Electrical C
Page 9 and 10: IRS27951S IRS27952(4)S Input/Output
Page 11 and 12: IRS27951S IRS27952(4)S VCC: Power S
Page 13 and 14: IRS27951S IRS27952(4)S Application
Page 15 and 16: IRS27951S IRS27952(4)S - For closed
Page 17 and 18: IRS27951S IRS27952(4)S User initiat
Page 19 and 20: IRS27951S IRS27952(4)S Layout Examp
Page 21 and 22: IRS27951S IRS27952(4)S I CC Supply
Page 23 and 24: IRS27951S IRS27952(4)S Package Deta
Page 25 and 26: IRS27951S IRS27952(4)S Tape and Ree
Page 27 and 28: IRS27951S IRS27952(4)S Part Marking

IRS27951S IRS27952(4)S - International Rectifier

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