SOT-23 Boost PFC Control IC
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1 µpfc TM Features Critical-conduction mode PFC control High PF and ultra-low THD Wide load and line range Regulated and programmable DC bus voltage No secondary winding required MOSFET cycle-by-cycle over-current protection DC bus over-voltage protection Low EMI gate drive Ultra-low start-up current 20.8V internal zener clamp on VCC Excellent ESD and latch immunity RoHS compliant 5-pin SOT-23 package Applications SOT-23 Boost PFC Control IC Description The IRS2505 is a control IC for boost-type PFC circuits operating in critical-conduction mode. The IC incorporates a free-running frequency oscillator with on- and off-time control of the boost power MOSFET without the need for a secondary winding. Also included in the design is over-voltage protection of the DC bus and cycle-by-cycle over-current protection of the power MOSFET. Micro-power start-up current and an internal 20.8V zener clamp at VCC are provided to simplify the external VCC supply circuitry. ESD and latch immune CMOS technology enables a rugged monolithic IC construction. Package Options Off-line power supply Electronic ballast LED power supply Application Diagram Rect (+) 5 Lead SOT23 DC Bus (+) VCC (+) CMP 1 COM 2 VCC 3 IRS2505 VBUS 5 PFC 4 VCC (-) Rect (-) DC Bus (-) Ordering Information Standard Pack Base Part Number Package Type Orderable Part Number Form Quantity IRS2505LPBF 5L-SOT-23 Tape and Reel 3000 IRS2505LTRPBF International Rectifier July 22, 2013
2 Timing Diagram PFC VCC VPFCOFF VPFCZX- t ILPFC t VDRAIN DC BUS OFF-TIME ON-TIME t International Rectifier July 22, 2013
3 Qualification Information Qualification Level Moisture Sensitivity Level Machine Model ESD Human Body Model IC Latch-Up Test RoHS Compliant Industrial (per JEDEC JESD 47E) Comments: This family of ICs has passed JEDEC s Industrial qualification. IR s Consumer qualification level is granted by extension of the higher Industrial level. MSL1 SOT-23 (per IPC/JEDEC J-STD-020C) Class B (per JEDEC standard EIA/JESD22-A115-A) Class 2 (per EIA/JEDEC standard JESD22-A114-B) Class I, Level A (per JESD78A) Yes Qualification standards can be found at International Rectifier s web site Higher qualification ratings may be available should the user have such requirements. Please contact your International Rectifier sales representative for further information. Higher MSL ratings may be available for the specific package types listed here. Please contact your International Rectifier sales representative for further information International Rectifier July 22, 2013
4 IRS2505LPbF 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 pin. The thermal resistance and power dissipation ratings are measured under board mounted and still air conditions. Symbol Definition Min. Max. Units VPFC PFC pin voltage -0.3 VCC VBUS VBUS pin voltage -0.3 VCC V ICC VCC pin supply current ICMP CMP pin current ma PD Package power Ta SOT ºC 5L mw RΘja Thermal resistance, junction to SOT-23 ambient 5L ºC/W Tj Junction temperature Ts Storage temperature ºC TL Lead temperature (soldering, 10 seconds) This IC contains a voltage clamp structure between the chip VCC and COM which has a nominal breakdown voltage of 20.8V. This supply pin should not be driven by a DC, low impedance power source greater than the VCLAMP specified in the Electrical Characteristics section. This IC contains a voltage clamp structure between the CMP and COM which has a nominal breakdown voltage of 10.2V. This pin should not be driven by a DC, low impedance power source greater than the VZCMP specified in the Electrical Characteristics section International Rectifier July 22, 2013
5 IRS2505LPbF Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol Definition Min. Max. Units VCC Supply voltage VCCUV V VCLAMP V ICC Supply current 0 10 ma VCMP CMP pin voltage 0 VZCMP V Tj Junction temperature ºC Recommended Component Values Symbol Component Min. Max. Units CCMP Compensation capacitor value nf CVCC VCC filter capacitor nf CVBUS VBUS pin filter capacitor nf International Rectifier July 22, 2013
6 Electrical Characteristics VCC=14V, CVCC=0.1uF, CCMP=0.68uF, CPFC=1nF, CVBUS=10nF, and Ta=25 C unless otherwise specified. Symbol Definition Min Typ Max Units Test Conditions Supply Characteristics VCLAMP VCC clamp voltage VCCUV+ VCCUV- Rising VCC under-voltage lock-out threshold Falling VCC under-voltage lock-out threshold VCCUVHYS VCC UVLO hysteresis IQCCUV Micro-power start-up VCC supply current V µa ICC = 19 ma N/A VCC = VCCUV mV rising ICC50kHz VCC 50kHz ma MOSFET = IRF840A PFC Characteristics VBUSREG VBUS Pin Regulation Voltage VBUSOV+ VBUS Pin OVP Threshold VBUSOV- VBUS Pin OVP Fault Reset Threshold V VBUSOC+ VBUS Pin Over-Current Threshold VBUS = 3V twd Watch Dog Timer Pulse Interval ICMP+ CMP Pin OTA IO VBUS=3.5V,VCMP=0V µa ICMP- CMP Pin OTA IO VBUS=4.5V,VCMP=5V VCMPOH OTA Output Voltage Swing (high state) VBUS=3.5V VCMPOL OTA Output Voltage Swing (low state) V VBUS=4.5V VCMPFLT OTA Output Voltage in Fault Mode VZCMP CMP Pin Clamp Voltage VBUS=3.5V Gate Driver Output Characteristics (PFC) VPFCON Gate High Voltage --- VCC --- VPFCOFF Gate Low Voltage tf Output fall time nsec Falling, 80% to 20% IO- Output sink current ma V International Rectifier July 22, 2013
7 Pin Assignments and Definitions CMP 1 COM 2 VCC 3 IRS2505 VBUS 5 PFC 4 Pin Name Description 1 CMP PFC error amplifier compensation 2 COM IC power and signal ground 3 VCC Logic and gate drive supply voltage 4 PFC PFC gate driver output and zero-crossing detection 5 VBUS DC bus sensing input, OVP and OCP International Rectifier July 22, 2013
8 Package Details: 5 Lead SOT International Rectifier July 22, 2013
9 Tape and Reel Details: 5 Lead SOT International Rectifier July 22, 2013
10 Tape and Reel Details: 5 Lead SOT International Rectifier July 22, 2013
11 Part Marking Information: 5 Lead SOT23 Top Marking Bottom Marking The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This document supersedes and replaces all information previously supplied. For technical support, please contact IR s Technical Assistance Center WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California Tel: (310) International Rectifier July 22, 2013
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