SP6837 SYNC-POWER | Alldatasheet

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Technical content

LOW-POWER OFF -LINE PRIMARY SIDE REGULATION CONTROLLER 2014/03/12 Ver.1 Page 1 SP6837 DESCRIPTION FEATURES The SP6837 has the built-in programmable cable voltage drop compensation function, which make it flexible to accommodate various cables with different gauges and lengths. The SP6837provides accurate constant voltage, constant current (CV/CC) regulation without requiring an opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The SP6837 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 30mW. The SP6837is a high performance AC/DC power supply controller for battery charger and adapter applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. The SP6837is available in SOIC-8 package.

  • Primary Side Control for Eliminating Opto- coupler and Secondary CV/CC Control Circuitry
  • 30mW No-load Input Power
  • Programmable Output Cable V oltage Drop Compensation
  • Proprietary CC Tightening Technique to Achieve Vertical CC Profile
  • Compensation for External Component Temperature Variations
  • Flyback Topology in DCM Operation
  • Random Frequency Adjustment to Reduce System EMI
  • Built-in Soft Start
  • Over V oltage Protection
  • Short Circuit Protection
  • SOIC-8 Package

APPLICATIONS

  • Adapter/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus
  • LED Driver
  • Standby and Auxiliary Power Supplies

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ORDERING INFORMATION

Part Number Package Part Marking SP6837D8TGB DIP-8P SP6837 SP6837S8RGB SOP-8P SP6837 ※ SP6837D8TGB : Tube ; Pb – Free ; Halogen-Free ※ SP6837S8RGB : Tape Reel ; Pb – Free ; Halogen-Free PART MARKING SOIC-8 ABSOULTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.) The following ratings designate persistent limits beyond which damage to the device may occur . Symbol Parameter Value Unit VCC DC Supply V oltage -0.3 ~ 36 V VCOMP / RT / CS COMP / RT / CS V oltage -0.3 ~ 7.0 V OUT Output Current at OUT Internally limiter A ESD Human Body Model 2 KV Machine Model 200 V FB FB input -40 ~ 10 V TJ Operating Junction Temperature Range 150 ℃ TSTG Storage Temperature Range -65 ~ 150 ℃ TLEAD Pb-Free Lead Soldering Temperature for 5 sec. 300 ℃ RӨJC Thermal Resistance Junction – Case (*) 190 ℃/W (*)Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.

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ELECTRICAL CHARACTERISTICS

(TA=25℃, VCC=15V , unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit UVLO SECTION VTH(ST) Start-up Threshold 17 18.5 21 V VOPR(min) Minimal Operating V oltage 8.2 9.2 10.2 V Reference Voltage VBIAS BIAS Pin V oltage RBIAS=200KΩ , After Turn On 1.0 1.1 1.2 V STANDBY CURRENT SECTION) IsT Start-up Current VCC=VTH(ST)-0.5V , RBIAS=200KΩ Before start-up 1.5 uA ICC(OPR) Operating Current RBIAS=200KΩ 390 480 uA DRIVE OUTPUT SECTION IOUT OUT Maximum Current Source RBIAS=200KΩ 20 30 40 mA CURRENT SENSE SECTION VCS Current Sense Threshold 490 513 535 mV VCS(PRE) Pre-Current Sense 390 413 435 mV Leading Edge Blanking 500 ns FEEDBACK INPUT SECTION IFB Feedback Pin Input Leakage Current VFB=4V 2.0 3.0 4.0 uA VFB Feedback Threshold 3.97 4.03 4.09 V VFB(EN) Enable Turn-on V oltage -2.0 -1.7 -1.4 V OUTPUT VOLTAGE COMPENSATION SECTION VCPR CPR V oltage Dons (Tons/T): from 55% to 0.02% 1.5 3.5 V ICPR CPR Sink Current 200 uA PROTECTION SECTION VFB(OVP) Over V oltage Protection 7 8 9 V

LOW-POWER OFF -LINE PRIMARY SIDE REGULATION CONTROLLER 2014/03/12 Ver.1 Page 7 SP6837 Typical Performance Characteristics

LOW-POWER OFF -LINE PRIMARY SIDE REGULATION CONTROLLER 2014/03/12 Ver.1 Page 8 SP6837 Information provided is alleged to be exact and consistent. SYNC Power Corporation presumes no responsibility for the penalties of use of such inform ation or for any violation of patents or other rights of third parties that may result from its use. No license is granted by allegation or otherwise under any patent or patent rights of SYNC Power Corporation. Conditions mentioned in this publication ar e subject to change without notice. This publication surpasses and replaces all information previously supplied. SYNC Power Corporation products are not authorized for use as critical components in life support devices or systems without express written approval of SYNC Power Corporation. © The SYNC Power logo is a registered trademark of SYNC Power Corporation © 2004 SYNC Power Corporation – Printed in Taiwan – All Rights Reserved SYNC Power Corporation 7F-2, No.3-1, Park Street NanKang District (NKSP), Taipei, Taiwan, 115, R.O.C Phone: 886-2-2655-8178 Fax: 886-2-2655-8468 http://www.syncpower.com