 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Green-Mode PWM Controller 300mA Driving Capability ST6850 DESCRIPTION The ST6850 is the current mode PWM controller with green-mode power-saving operation which can meet the low standby-power needs for low power SMPS. This greenmode function enables the power supply to easily meet even the strictest power conservation requirements. The small package provides the high efficiency / low cost solution for SMPS power applications. ST6850 is processed by BiCMOS fabrication, that enables reducing the start-up current and the operating current. ST6850 is available by SOT-23-6L / DIP-8P packages. PIN CONFIGURATION SOT-23-6L DIP-8P APPLICATIONS AC / DC Switching Power Adaptor Battery Charger PC 5V Standby Power Open-Frame Switching Power Supply FEATURE High-Voltage BiCMOS Process Very Low Startup Current( <25u ) Under Voltage Lockout( UVLO ) Current Mode Control Current Limiting Programmable Switching Frequency Intermal Slope Compensation Green-Mode Control for Power Saving Non-audible-noise Green Mode Control 300mA Driving Capability OVP (Over Voltage Protection) on Vcc Pin PART MARKING SOT-23-6L DIP-8P YYWW STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 1 Green-Mode PWM Controller 300mA Driving Capability ST6850 TYPICAL APPLCTUON CIRCUIT ( High Efficiency SMPS ) ST6850 PIN DESCRIPTION ST6850D8T Pin Symbol 1 OUT 2 VCC 3 NC 4 CS 5 6 7 RT NC COMP Descripton Gate driver output to drive the external MOSFET Supply Voltage Unconnected pin Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin also provides current amplitude information for current-mode control. This pin is used to charge an internal capacitor, to determine the switching frequency. Unconnected pin Voltage feedback. The pin provides the output voltage regulation signal. It provides feedback to the internal PWM comparator, so that the PWM comparator can control the duty cycle. Grond 8 GND STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Green-Mode PWM Controller 300mA Driving Capability ST6850 SP6850S26R Pin Symbol Description 1 GND Ground 2 COMP Voltage feedback. The pin provides the output voltage regulation signal.. It provides feedback to the internal PWM comparator, so that the PWM comparator can control the duty cycle. 3 RT This pin is used to charge an internal capacitor, to determine the switching frequency. 4 CS Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin also provides current amplitude information for current-mode control. 6 VCC Supply Voltage 7 OUT Gate driver output to drive the external MOSFET STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page3 Green-Mode PWM Controller 300mA Driving Capability BLOCK DIAGRAM ST6850 ORDERING INFORMATION Part Number ST6850D8TG ST6850S26RG ST6850D8T : Tube; Pb - Free ST6850S26R: Tape Reel; Pb - Free Package DIP-8P SOT-23-6L Part Marking ST6850 805YW STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 4 Green-Mode PWM Controller 300mA Driving Capability ABSOULTE MAXIMUN RATINGS ( Ta=25 ST6850 , unless otherwise specified.) The following ratings designate persistent limits beyond which damage to the device may occur. Symbol Vcc Ccomp/ Rt/ Cs Pd Pj Tstg Tlead Parameter DC Supply Vlotage SYNC Power Dissipation @ Ta=85 * Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperaature for 5 sec Value 40 -3~7 0.3 150 150 Unit V V W SOT-23-6L 220 DIP-8P 260 SOT-23-6L 95 Thermal Resistance Junction-Case(*) R jc /W DIP-8P 210 (*)The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 5 Green-Mode PWM Controller 300mA Driving Capability ELECTRICAL CHARACTERISTICS (Ta=25 Symbol Parameter Supply Voltage ( Vcc Pin ) Istt Startup Current Iop Operating Current UVLO(off) Min. Operatinf Voltage UVLO(on) Start Threshold Voltage Voltage Feedback ( Comp Pin ) Isc Short Circuit Current Vop Vth(gm) Open Loop Voltage Green Mode Threshold VCOMP ST6850 , Vcc=15V, unless otherwise specified.) Coneitions Min. Typ. Max. Unit 8 2 9.0 15.0 16.0 2.2 5.0 2.35 25 4 17.0 3.0 uA mA V V mA V V Vcomp=3V 10.0 11.0 Oscillator ( RT Pin ) Fosc Frequency Fosc(gm) Green Mode Frequency Frequency Variation versus Temp Deviation Fdv Frequency Variation versus Vcc Deviation Current Sensing ( CS Pin ) Vcs(off) Zcs Maximum Input Vlotage Input impedance Fdt Rt=100K Fs=65.0KHz (-40 (Vcc=11V ~ 25V) 60.0 65.0 70.0 KHz 20 KHz 3 1 % % 0.8 0.85 50 150 0.9 V K nS Tpd Delay to Output Gate Driver Output ( OUT pin ) VOL Output Low level VOH Tr Tf Output High Level Rising Time Falling Time Vcc=15V, Io=20mA Vcc=15V, Io=20mA Load Cap=1000pF Load Cap=1000pF 1 8 50 30 200 120 V V nS nS STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 6 Green-Mode PWM Controller 300mA Driving Capability PERFORMANCE CHARACTERISTICS (Ta=25 ST6850 , unless otherwise specified.) Page 7 Green-Mode PWM Controller 300mA Driving Capability PERFORMANCE CHARACTERISTICS ST6850 Page 8 Green-Mode PWM Controller 300mA Driving Capability DIP- 8P PACKAGE OUTLINE ST6850 STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 9 Green-Mode PWM Controller 300mA Driving Capability SOT-23-6L PACKAGE OUTLINE ST6850 STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 10 |
Price & Availability of ST6850
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |