SFA0001 SANKEN

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１ Scope The present specifications shall apply to switching power supply IC SFA0001-VF-RP ２ Outline Type Semiconductor IC (Monolithic IC) Structure Plastic package (Transfer mold) Build-in current limit protection, thermal shutdown protection. Features Built-in error-amp helps eliminate components at sensing stage such as shunt regulator. ３ Absolute maximum ratings ３－１ Absolute maximum ratings（Ta=25℃） Parameter Symbol Ratings Unit OCP terminal voltage VOCP -6～+6 V SS terminal voltage VSS -0.3～+9 V FB terminal voltage VFB -0.3～+6 V Input voltage for control part VCC 0～ 3 6 V Phase compensation terminal voltage VCOMP -0.3～+ 6 V Frequency setting terminal voltage VFREQ -0.3～+ 6 V Drive terminal peak current IDRV(peak) -540mA～+270mA mA Drive terminal DC current IDRV(DC) -180mA～+90mA mA Power dissipation PD 1.2 (※１） W Junction temperature Tj -40～150 ℃ Storage temperature Tstg -40～150 ℃ （※1）Mounted on glass epoxy board (The dimension of PCB : 42mm×32mm×1mmt) ３－２ Recommended operating conditions Parameter Symbol Ratings Unit Input voltage for control part V CC 6～24 V Switching frequency FOSC 20～200 ｋHz
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Type Semiconductor IC (Monolithic IC)
Structure Plastic package (Transfer mold)
Features Build-in current limit protection, thermal shutdown protection. Built-in error-amp helps eliminate components at sensing stage such as shunt regulator.
Parameter Symbol Ratings Unit
OCP terminal voltage VOCP -6～+6 V
SS terminal voltage VSS -0.3～+9 V
FB terminal voltage VFB -0.3～+6 V
Input voltage for control part VCC 0～ 3 6 V
Phase compensation terminal voltage VCOMP -0.3～+ 6 V
Frequency setting terminal voltage VFREQ -0.3～+ 6 V
Drive terminal peak current IDRV(peak) -540mA～+270mA mA
Drive terminal DC current IDRV(DC) -180mA～+90mA mA
Power dissipation PD 1.2 (※１） W
Junction temperature Tj -40～150 ℃
Storage temperature Tstg -40～150 ℃
Parameter Symbol Ratings Unit
Input voltage for control part V CC 6～24 V
Switching frequency FOSC 20～200 ｋHz

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４ Electrical characteristic ４-１ Electrical characteristics (VCC=14V, Ta=-40～125℃) (*1) Ratings Conditions Parameter Symbol Unit MIN TYP MAX Power supply Start-up Operation FB=0V、SS=0V、OCP=0V、FREQ=200pF Operation start voltage VCC(ON) 4.9 5.1 5.3 V VCC=0V→14V FB=0V、SS=0V、OCP=0V、FREQ=200pF Operation stop voltage VCC(OFF) 4.4 4.6 4.8 V VCC=14V→0V FB=0V、SS=0V、OCP=0V、FREQ=200pF、 Circuit current in operation ICC(ON) 1.8 2.8 4 mA VCC=14V FB=0V、SS=0V、OCP=0V、FREQ=200pF、 Circuit current in non-operation ICC(OFF) 0.3 0.6 1 mA VCC=4.8V Normal Operation FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS terminal high threshold voltage VHSS 1.9 2 2.1 V SS=0V→2.5V FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS terminal low threshold voltage VLSS 0.9 1 1.1 V SS=2.5V→0V VHSS-VLSS SS terminal voltage hysteresis width Δ VSS 0.9 1 1.1 V FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS terminal outflow current Isrc(SS) 11 15 19 uA SS=0.9V FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS terminal inflow current Isnk(SS) 13 17 21 uA SS=2.1V FB=0V、SS=0V、OCP=0V、FREQ=200pF、 Switching frequency fosc(200p) 85 100 115 kHz VCC=14V FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ terminal outflow current Isrc(FREQ) 27 30 33 uA FREQ=0.9V FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ terminal inflow current Isnk(FREQ) 75 86 95 uA FREQ=2.1V FB=0V、OCP=0V、SS=0V、VCC=14V、 Oscillation circuit high threshold voltage VHF 1.9 2 2.1 V FREQ=0V→2.5V FB=0V、OCP=0V、SS=0V、VCC=14V、 Oscillation circuit low threshold voltage VLF 0.9 1 1.1 V FREQ=2.5V→0V FB=0V、SS=0V、OCP=0V、FREQ=200pF、 Maximum on-duty width Dmax 70 73 78 % VCC=14V FB=0V、SS=2.5V、COMP=1.3V、 Slope compensation rate SLP 2.1 2.5 2.9 mV/% FREQ=470p、VCC=14V、OCP=0V→1V SS=0V、OCP=0V、FREQ=0V、VCC=14V Feedback voltage VFB 2.45 2.5 2.55 V FB=0V→2.5V FB=0V、OCP=0V、SS=0V、VCC=14V Drive voltage Vdrive 7.6 8.3 9 V FREQ＝3V・１pluse FB=0V、OCP=0V、SS=0V、VCC≧6V Minimam drive voltage Vdrive(min) 4 V FREQ＝3V・１pluse FB=3V、SS=0V、OCP=1V、FREQ=200pF、 Minimum on-time Ton(min) 400 ns VCC=14V Protection Operation Leading edge blanking time Tbw (70) 100 (150) ns (*2) FB=0V、SS=0V、VCC=14V OCP threshold voltage VOCP 0.46 0.5 0.54 V FREQ＝3V・１pluse、OCP=0V→1V FB=0V、OCP=0V、SS=１0ｎF、VCC=14V OLP delay time TOLP 32 42 52 ms FREQ＝3V・１pluse FB=0V、OCP=0V、VCC=14V Drive stop threshold voltage VST 3.5 4 4.5 V FREQ＝3V・１pluse、SS=0V→5V Thermal shutdown operating temperature TjH (TSD) 150 165 ℃ (*2) Thermal shutdown release temperature TjL (TSD) 150 ℃ (*2) *1 The ratings at Ta=-40℃ to 125℃ shall be treated as a design value. The ratings of devices shall be checked at -30℃,25℃,125℃ at Outgoing Inspection. *2 The rating of devices shall be treated as a design value. ４-２ Typical characteristics(Ta=25℃)
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Parameter Symbol Ratings Unit Conditions
MIN TYP MAX
Power supply Start-up Operation
Operation start voltage VCC(ON) 4.9 5.1 5.3 V FB=0V、SS=0V、OCP=0V、FREQ=200pF VCC=0V→14V
Operation stop voltage VCC(OFF) 4.4 4.6 4.8 V FB=0V、SS=0V、OCP=0V、FREQ=200pF VCC=14V→0V
Circuit current in operation ICC(ON) 1.8 2.8 4 mA FB=0V、SS=0V、OCP=0V、FREQ=200pF、 VCC=14V
Circuit current in non-operation ICC(OFF) 0.3 0.6 1 mA FB=0V、SS=0V、OCP=0V、FREQ=200pF、 VCC=4.8V
Normal Operation
SS terminal high threshold voltage VHSS 1.9 2 2.1 V FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS=0V→2.5V
SS terminal low threshold voltage VLSS 0.9 1 1.1 V FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS=2.5V→0V
SS terminal voltage hysteresis width Δ VSS 0.9 1 1.1 V VHSS-VLSS
SS terminal outflow current Isrc(SS) 11 15 19 uA FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS=0.9V
SS terminal inflow current Isnk(SS) 13 17 21 uA FB=0V、OCP=0V、FREQ=0V、VCC=14V、 SS=2.1V
Switching frequency fosc(200p) 85 100 115 kHz FB=0V、SS=0V、OCP=0V、FREQ=200pF、 VCC=14V
FREQ terminal outflow current Isrc(FREQ) 27 30 33 uA FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ=0.9V
FREQ terminal inflow current Isnk(FREQ) 75 86 95 uA FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ=2.1V
Oscillation circuit high threshold voltage VHF 1.9 2 2.1 V FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ=0V→2.5V
Oscillation circuit low threshold voltage VLF 0.9 1 1.1 V FB=0V、OCP=0V、SS=0V、VCC=14V、 FREQ=2.5V→0V
Maximum on-duty width Dmax 70 73 78 % FB=0V、SS=0V、OCP=0V、FREQ=200pF、 VCC=14V
Slope compensation rate SLP 2.1 2.5 2.9 mV/% FB=0V、SS=2.5V、COMP=1.3V、 FREQ=470p、VCC=14V、OCP=0V→1V
Feedback voltage VFB 2.45 2.5 2.55 V SS=0V、OCP=0V、FREQ=0V、VCC=14V FB=0V→2.5V
Drive voltage Vdrive 7.6 8.3 9 V FB=0V、OCP=0V、SS=0V、VCC=14V FREQ＝3V・１pluse
Minimam drive voltage Vdrive(min) 4 V FB=0V、OCP=0V、SS=0V、VCC≧6V FREQ＝3V・１pluse
Minimum on-time Ton(min) 400 ns FB=3V、SS=0V、OCP=1V、FREQ=200pF、 VCC=14V
Protection Operation
Leading edge blanking time Tbw (70) 100 (150) ns (*2)
OCP threshold voltage VOCP 0.46 0.5 0.54 V FB=0V、SS=0V、VCC=14V FREQ＝3V・１pluse、OCP=0V→1V
OLP delay time TOLP 32 42 52 ms FB=0V、OCP=0V、SS=１0ｎF、VCC=14V FREQ＝3V・１pluse
Drive stop threshold voltage VST 3.5 4 4.5 V FB=0V、OCP=0V、VCC=14V FREQ＝3V・１pluse、SS=0V→5V
Thermal shutdown operating temperature TjH (TSD) 150 165 ℃ (*2)
Thermal shutdown release temperature TjL (TSD) 150 ℃ (*2)

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1000 115 k [ 112 ) 109 p 106 0 0 103 fosc[kHz] 2 100 100 c ( 97 s 94 o 91 f 88 10 85 10 100 1000 10000 -50 0 50 100 150 CFREQ[pF] T j℃ [] 9 2 . 5 5 8 2 . 5 4 7 2 . 5 3 ] 2 . 5 2 V 6 2 . 5 1 Vdrive[V] [ 5 B 2 . 5 4 2 . 4 9 V F 3 2 . 4 8 2 2 . 4 7 1 2 . 4 6 0 2 . 4 5 0 5 10 15 20 25 -50 0 50 100 150 VCC[V] T j℃ [] 4 3.5 3 2.5 ICC[mA] 2 1.5 1 0.5 0 0 5 10 15 20 25 VCC[V] ５ Block diagram Vcc 5.1/4.6V 2.5V Power Vref Reg UVLO Reg ON RST 5V DriveReg V reference 8.3V STOP + + - - 7V 4V FREQ OSC SS SS_OSC LEB SoftStart OLP OCP Drv + OCPComparator Logic Driver - + FBComparator - TSD Slope ErrAmp FB - + 2.5V COMP GND
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６ Standard connection ※Since the switching noise caused by Q1 may affect the operation of an IC ,appropriate design for peripheral circuits is required to prevent the malfunction of an IC by adding snubber circuit and /or filter circuit. ７ Pins function description Terminal No symbols Descripton 1 VCC Power supply terminal 2 FB Feedback terminal 3 GND Ground terminal 4 SS Soft start terminal 5 FREQ Frequency setting terminal 6 COMP Phase compensation terminal 7 Drive Gate drive terminal 8 OCP Over current protection terminal
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Terminal No symbols Descripton
1 VCC Power supply terminal
2 FB Feedback terminal
3 GND Ground terminal
4 SS Soft start terminal
5 FREQ Frequency setting terminal
6 COMP Phase compensation terminal
7 Drive Gate drive terminal
8 OCP Over current protection terminal

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８ Timing diagram ８－１ Timing diagram in standard connection VCC VCC(ON) VCC(OFF) FB VFB COMP Δ VSS SS VHSS VLSS FREQ VHF VLF Dmax Vdrive DRV OCP VOCP Startup transient operation Steady operation Start Softstart stop ８－２ Timing diagram in protection VCC VCC(ON) VCC(OFF) TOLP TOLP× ８ SS VST FREQ Protected by OCP Drv VOCP VOCP OCP Ov ercurrent state R eleased from OLP operation Stop Drv terminal operation by extarnal Input to SS terminal
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９ Package information ９－１Package type, physical dimensions and material ※1：Part Number ※2：Logo Mark ※3：Lot Number 1st letter：The Last digit of year 2nd letter：Month SFA0001 ※1 （1 to 9 Jan. to Sept.,O for Oct. N for Nov. D for Dec.） SK ※2 3rd & 4th letter：day 01～31 Arabic Numeral ※4：Administer number ※3 ※4 Dimensions in mm Lead is solder-plated Zoom of A part (except cutting surface of lead) Terminal No symbols Descripton 1 VCC Power supply terminal 2 FB Feedback terminal 3 GND Ground terminal 4 SS S oft start terminal 5 FREQ Freque ncy setting terminal 6 COMP Phase compensation terminal 7 Drive Gate drive terminal 8 OCP Over current protection terminal ９－２ Appearance The body shall be clean and shall not bear any stain, rust or flaw. ９－３ Marking The type number and lot number shall be legitimately marked in order not to be erased easily.
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Terminal No symbols Descripton
1 VCC Power supply terminal
2 FB Feedback terminal
3 GND Ground terminal
4 SS Soft start terminal
5 FREQ Frequency setting terminal
6 COMP Phase compensation terminal
7 Drive Gate drive terminal
8 OCP Over current protection terminal

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The example of the solder pattern L L b2 e1 I2 e1 β1 β2 L b α e e e e e e 記号 寸法(mm) Symbol Dimensions(mm) e1 5.72 e 1.27 α 0.2以o上r more β1 0.2～0.5 β2 0.2 L 0.6 b 0.42 b2 0.76 I2 L+β1+β2 There are reference value that are according with the EIAJ standards. (ED-7402-1)
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記号 Symbol 寸法(mm) Dimensions(mm)
e1 5.72
e 1.27
α 0.2以o上r more
β1 0.2～0.5
β2 0.2
L 0.6
b 0.42
b2 0.76
I2 L+β1+β2

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SOP8 Taping specifications for packing 1． Outline This specification specifies packaging spec. for Sanken electric co., SFA0001-VF-RP as well as its related matters. Shipping is only taping as to SOP8. 2． Part name indication This followings specifies part name for taping spec. 2.1 Part name indication method “Part name” - VF 2.2 IC direction in carrier tape pocket SFA0001-VF-RP is [VF type] . End of “Part name” is [- VB]: 1 pin of IC is facing to tape roll-in direction. End of “Part name” is [- VF]: 1 pin of IC is facing to tape pull-out direction. 3. Embossed taping specifications 3.1 Taping type and physical dimensions This carrier tape is treated antistatic treatment. 1Pin Pull-Out direction Material：Emboss
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3.2 Reeling type and physical dimensions This reel is made of plastic with antistatic treatment. A label shall be put on a side of flange. A label has part number including a direction for unreeling, quantity, and lot number. Note Reel Material：Plastic Label content NAME LOT No. AMOUNT P・C・Ｓ SANKEN ELECTRIC CO.,LTD
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3.3 Reeling specifications (Leader/Trail) Adhesive tape Cover tape section Empty carrier tape Trail Leader Leader Leader Cover tape section MIN 100mm Empty carrier tape MIN 320mm Leader Section MIN 420mm Trail Empty carrier tape MIN 80mm 3.4 Strength of taping seal Detachment Strength of cover tape 0.1～1.0N Tear away angle: 165～180° Detachment speed: 300±10mm／min Cover tape Carrier tape Tape feed direction 3.5 Missed parts on tape The number of missed parts cannot exceed 0.2% of total parts on the tape. Also, missing of sequential parts must not happen.
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4. Packaging 4.1 The number of parts per a reel: 3000 parts (MAX) 4.2 Indication of part name and quantity A label shows part number, quantity, and lot number. 4.3 Outer packaging of reel Reel is put into moisture barrier bag and seal with desiccant and put into outer box. 5. Packing Dimensions and Appearance (A box is made of card boards. The following dimensions are reference value.) 345 336 Dimensions of a box: H336mm x V345mm x T 40mm 233 357 Size of a box contains 5 small boxes: 357mm x 357x 233mm 6. Storage In order to avoid failures during picking and mounting of devices by degradation of taping peel strength and to maintain mounting quality, the box shall be stored under temperature +5~+40 degree C and humidity 40%~60%. Parts shall be used within 3 months from the shipping date with unpacked state. After unpacking the bag, the parts shall be stored under temperature 30℃ and humidity 60% and used within 168hrs. Moisture sensitivity level (MSL): Level 3
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CAUTION/ WARNING  Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or any other rights of Sanken or any third party which may result from its use.  Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction.  Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Please return to us this document with your signature(s) or seal(s) prior to the use of the products herein. When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss, and then return to us this document with your signature(s) or seal(s) prior to the use of the products herein. The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.  In the case that you use our semiconductor devices or design your products by using our semiconductor devices, the reliability largely depends on the degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general, derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor devices. For these stresses, instantaneous values, maximum values and minimum values must be taken into consideration. In addition, it should be noted that since power devices or IC’s including power devices have large self-heating value, the degree of derating of junction temperature (Tj) affects the reliability significantly.  When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance and proceed therewith at your own responsibility.  Anti radioactive ray design is not considered for the products listed herein.  Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken’s distribution network.
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