SR086SG-G

SR086/SR087 Adjustable Offline Inductorless Switching Regulators Features General Description • • • • The SR086/SR087 are inductorless switching regulators designed to operate directly from a rectified AC line. The operating principle is to turn on a pass transistor when the rectified AC is below the output voltage and to turn it off when the output voltage reaches a specific level. The ICs feature an adjustable main output voltage of 9V to 50V and an additional fixed output of 3.3V for SR086 and 5V for SR087. Efficiencies of around 55% may be realized for loads up to 1W in 120 VAC applications and about 50% efficiencies for loads up to 800 mW in 230 VAC applications. • • • • Efficient Operation without Magnetics No High-voltage Capacitors Adjustable Main Output Voltage (9V to 50V) Additional Internal Linear Regulator: - 3.3V for SR086 - 5V for SR087 Up to 100 mA Combined Output Current Single BOM for 120 VAC/230 VAC Built-in Soft Start Less than 200 mW Standby Power A logic-level enable input allows the SR086/SR087 to be disabled—useful when they are employed as keep-alive power supplies. Applications • • • • • White Goods Household Appliances Lighting Controls Circuit Breakers Keep-alive Supplies Package Type 8-lead SOIC (with Heat Slug) (Top view) VIN 1 8 GATE EN 2 7 VGD GND 3 6 VOUT VREG 4 5 VFB Heat Slug Backside on the SOIC package is at ground potential and may be connected to ground or left unconnected. See Table 2-1 for pin information. WARNING Galvanic isolation is not provided. Dangerous voltages are present when connected to the AC line. It is the responsibility of the designer using the SR086/SR087 to ensure that adequate security measures are in place to protect the end user from electrical shock. The circuits shown in this data sheet are not guaranteed to meet surge and conducted EMI requirements. The effectiveness of these circuits may vary with a particular application. The designer must conduct tests to ascertain compliance with applicable standards and regulations.  2017 Microchip Technology Inc. DS20005544A-page 1 SR086/SR087 Functional Block Diagrams 1.25A 90 to 270VAC 50/60Hz 1.0kV 1.0A 275V 50A RPD 390kΩ 9.0 - 50VDC STGD5NB120SZ CGD 100nF RGD 1.1MΩ GATE VIN 13V COUT 470μF COUT1 1.0μF VOUT VGD RQ S Upper circuitry powered by VGD - VOUT RFB(HI) = RFB(LO) VOUT - 1 1.25V Level Translator Lower circuitry powered by VOUT - GND FB EN 1.25V REG SR086 VREG 3.3V CREG 100nF GND RFB(LO) 12.4kΩ 1.25A 90 to 270VAC 50/60Hz 1.0kV 1.0A 275V 50A RPD 390kΩ 9.0 - 50VDC STGD5NB120SZ CGD 100nF RGD 1.1MΩ VIN GATE 13V Upper circuitry powered by VGD - VOUT COUT 470μF COUT1 1.0μF VOUT VGD RQ S RFB(HI) = RFB(LO) VOUT - 1 1.25V Level Translator Lower circuitry powered by VOUT - GND FB EN 1.25V SR087 REG GND DS20005544A-page 2 VREG 5.0V CREG 100nF RFB(LO) 12.4kΩ  2017 Microchip Technology Inc. SR086/SR087 Typical Application Circuits 1.25A 90 to 270VAC 50/60Hz 1.0kV 1.0A VOUT 9.0 - 50VDC @100mA - IREG STGD5NB120SZ 275V 50A 390kΩ 1.0μF 1.1MΩ GATE VIN Enable EN 470μF 100nF VGD R1 = R2 VOUT FB SR086 3.3V @60mA R2 12.4kΩ VREG GND VOUT - 1 1.25V 100nF 1.25A 90 270VAC 50/60Hz 1.0kV 1.0A VOUT 9.0 - 50VDC @ 100mA - IREG STGD5NB120SZ 275V 50A 390kΩ 1.1MΩ GATE VIN Enable  2017 Microchip Technology Inc. EN 1.0μF 100nF VGD VOUT - 1 1.25V R1 = R2 VOUT SR087 GND 470μF FB 5.0V @60mA VREG R2 12.4kΩ 100nF DS20005544A-page 3 SR086/SR087 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Output Voltage, VOUT ..................................................................................................................................–0.3V to 56V Feedback Voltage, VFB ..............................................................................................................................–0.3V to 6.5V Enable Voltage, VEN ...................................................................................................................................–0.3V to 6.5V Operating Junction Temperature, TJ .................................................................................................... –40°C to +125°C † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS Parameter Sym. Min. Typ. Max. Unit Output Voltage VOUT 9 — 50 V Load on VOUT, including Feedback Divider and Load on VREG IOUT 100 — — µA Headroom for Internal Linear Regulation (VOUT–VREG) VHR 4 — — V Conditions ELECTRICAL CHARACTERISTICS Electrical Specifications: Unless otherwise noted, TA = –40°C to +85°C. Voltages referenced to GND pin. Parameter Sym. Min. Typ. Max. Unit Conditions IGD — — 60 µA IOUT(INT) — — 400 µA VOUT = 9V–50V Gate Drive Supply Voltage VGD 11 13 15 V Note 1 Gate Output High Voltage VGATE(HI) 11 — 15 V Note 1 Gate Output Low Voltage VGATE(LO) — — 0.5 V Note 1 Feedback Voltage (Gate Off) VFB(OFF) 1.18 1.25 1.31 V Feedback Voltage (Hysteresis) VFB(HYST) — 50 — mV IFB — — 500 nA VIN Trip Voltage (Gate On) VTRIP(ON) 0 — 3 V Note 1 VIN Trip Voltage (Gate Off) VTRIP(OFF) 9 — 15 V Note 1 Enable Voltage, On VEN(ON) 0.2 — — V Enable Voltage, Off VEN(OFF) — — 0.75 VREG Current Consumption at VGD Current Consumption of the Lower Circuitry Feedback Input Current VIN Gate Turn-on Delay tDIG(ON) 0 — 1 µs CGATE = 1 nF VIN Gate Turn-off Delay tDIG(OFF) — — 600 ns CGATE = 1 nF Feedback Gate Turn-off Delay tDFG(OFF) — — 450 ns CGATE = 1 nF, VFB = 1.5V VREG 3.125 3.3 3.465 V ILOAD = 1 mA, VOUT = 9V 4.750 5 5.250 V Regulated Output Voltage SR086 SR087 VREG Load Regulation ΔI VREG –50 — +50 mV Gate VGD Diode Drop VD — — 1 V Note 1: 0 mA < ILOAD < 60 mA, VOUT = 9V, TAMB = 25°C I = 20 mA Referenced to VOUT DS20005544A-page 4  2017 Microchip Technology Inc. SR086/SR087 TEMPERATURE CHARACTERISTICS Electrical Characteristics: Unless otherwise noted, for all specifications TA =TJ = +25°C. Parameter Sym. Min. Typ. Max. Unit TJ –40 — +125 °C θJA — 84 — °C/W Conditions TEMPERATURE RANGE Operating Junction Temperature PACKAGE THERMAL RESITANCE 8-lead SOIC (with Heat Slug)  2017 Microchip Technology Inc. DS20005544A-page 5 SR086/SR087 SRO86 and SR087 Timing Diagram Pass Transistor on VIN VFB(OFF) 1+ RFB(HI) RFB(LO) VOUT not to scale Pass Transistor is turned off once VOUT reaches the trip point Pass Transistor is turned on when VIN falls below: VOUT + VTRIP(ON) Pass Transistor is on but not conducting since the input voltage is lower than the output voltage DS20005544A-page 6 Pass Transistor is on and conducting  2017 Microchip Technology Inc. SR086/SR087 2.0 PIN DESCRIPTION The descriptions of the SR086/SR087 pins are listed on Table 2-1. Refer to Package Type for the location of pins. TABLE 2-1: PIN FUNCTION TABLE Pin Number SR086 Pin Name SR087 Pin Name Description 1 VIN VIN Rectified AC input voltage 2 EN EN Active low enable input 3 GND GND Circuit ground (Note 1) 4 VREG VREG Regulated output voltage (Note 2) 5 FB FB 6 VOUT VOUT Output voltage (9V–50V adj.) Feedback input 7 VGD VGD Gate drive supply (referenced to VOUT) 8 GATE GATE Drives external IGBT pass transistor Note 1: Circuit ground will be at the AC line potential. 2: Fixed 3.3V for SR086 and fixed 5V for SR087  2017 Microchip Technology Inc. DS20005544A-page 7 SR086/SR087 3.0 APPLICATION INFORMATION VIN 90 to 270VAC 50/60Hz D1 1.0kV 1.0A F1 1.0A Z1 275V 50A * Two resistors used in series for reasons of high voltage creepage and resistor voltage rating. Q1 STGD5NB120SZ *R1 200kΩ *R3 510kΩ *R2 200kΩ *R4 510kΩ C1 100nF 1 2 Enable VIN 90 to 270VAC 50/60Hz VGD C2 1.0μF R5 113kΩ FB GND VREG 5 4 C4 100nF 3 D1 1.0kV 1.0A F1 1.0A Z 1 275V 50A Q1 STGD5NB120SZ *R1 200kΩ *R3 510kΩ *R2 200kΩ *R4 510kΩ R6 12.4kΩ VIN EN R7 100kΩ VOUT 12.6VDC C1 100nF C2 1.0μF 1 2 Enable 7 8 GATE VGD FB SR087 VREG GND C3 470μF R5 113kΩ 6 VOUT 5 4 VREG 5.0VDC C4 100nF 3 3.1 VREG 3.3VDC SR086 Typical Application Circuit. * Two resistors used in series for reasons of high voltage creepage and resistor voltage rating. FIGURE 3-2: C3 470μF 6 VOUT SR086 EN R7 100kΩ FIGURE 3-1: 7 8 GATE VIN VOUT 12.6VDC R6 12.4kΩ SR087 Typical Application Circuit. Output Voltage VOUT may be adjusted in the range of 9V to 50V by changing feedback resistor R5 based on Equation 3-1. EQUATION 3-2: 1.5W I REG  MAX  = ------------------------------------ or 60 mA, whichever is  V OUT – 3.3V  less EQUATION 3-1: R 5 = R 6   V OUT  1.25V  – 1  Leave R6 at 12.4 kΩ or less as it assures a minimum 100 µA load required for the proper operation of SR086/SR087. Change R3 and R4 according to Equation 3-4. Select C2 and C3 with appropriate voltage ratings. For C3, use a low-ESR capacitor with an adequate ripple current rating (800 mARMS). Use ceramic for C2. Since VREG is a linear regulator supplied from VOUT, the maximum current available from VREG is reduced as VOUT is increased due to power considerations. Refer to Equation 3-2 for SR086 and Equation 3-3 for SR087. DS20005544A-page 8 EQUATION 3-3: 1.5W I REG  MAX  = ------------------------------ V OUT – 5V  or 60 mA, whichever is less 3.2 Input Voltage To reduce standby power for 230 VAC-only applications or for supply voltages less than 90 Vrms, R3 and R4 should be changed according to Equation 3-4. R1+R2 should remain at 400 kΩ or less. Two resistors in series are used to ensure adequate creepage distances for 230 VAC operation. For 120 VAC-only applications, single resistors may be used.  2017 Microchip Technology Inc. SR086/SR087 EQUATION 3-4: R3 + R4 EQUATION  Vx  – V x cos 1  ---------------------- IN IN  2  V IN  R 3 + R 4   -------------------------------------------------------------------------------------  25A 2V 2 –V 2 Use the minimum anticipated RMS value for VIN. Take resistor tolerance into account, selecting the next lower standard value. Choosing a lower value has no effect other than higher standby power. Where: Vx = VOUT + 15V 3.3 Output Ripple 3.5 Storage capacitor C3 was sized to provide about 2VP-P ripple at 100 mA load (IOUT + IREG). For lighter loads, C3 may be reduced. Conversely, C3 may be increased for lower ripple. Use a low-ESR capacitor with an adequate ripple current rating (e.g. 800 mARMS for 100 mA loads). Efficiency and output current capability may drop with increased capacitance because of a smaller conduction angle associated with lower ripple. Due to feedback hysteresis, ripple cannot be reduced below 4%. See Equation 3-5. Electromagnetic Interference (EMI) Capacitor Small-value capacitors from circuit common to earth ground should not be used as they prevent the SR086/SR087 from operating. See Figure 3-4. SR086 & Circuitry AC Line EQUATION 3-5: earth ground V RIPPLE  P – P    I OUT + I REG   2f IN C3 Note: VREG requires at least 4V of headroom. Therefore, VOUT, including ripple, must not fall below 7.3V for SR086 and 9V for SR087. 3.4 Line Transformer During initial testing, it is tempting to use an isolation transformer or a variable transformer on the AC line. However, the high inductance of the transformer (frequently in mH range) should not be used because it interferes with the normal operation of the SR086/SR087. This is not a concern with the normal inductance of the AC line or for AC line filters. SR086 Circuitry AC Line FIGURE 3-3: Line Transformer. As shown in Figure 3-3, the SR086/SR087 draw current from the AC line (in short, high current pulses). The transformer’s high inductance tends to limit the current pulse. Furthermore, inductive kickback on the falling edge of the current pulse can create high voltage spikes which must be absorbed by the transient protector.  2017 Microchip Technology Inc. FIGURE 3-4: 3.6 circuit common EMI Capacitor. EMI The SR086/SR087 circuits, as shown in the Functional Block Diagrams, meet FCC Class B and CISPR 14-1 (household appliances) requirements for conducted emissions for combined loads of less than 20 mA (IOUT + IREG). 3.7 Fuse Although the average current drawn from the AC line is low, the RMS current is fairly high due to the current being drawn in short high-current pulses. Since a fuse is basically a resistor with a power dissipation given by IRMS2 R, the fuse must be sized for the RMS current and not the average current. For a 1W load at 120 VAC, the RMS current is 700 mARMS, while the RMS current for a 0.5W load at 230 VAC is 360 mARMS. 3.8 Load Total load on the SR086/SR087 is the total load current drawn from VOUT (IOUT), and since the linear regulator is supplied from VOUT, it also includes the current drawn from VREG (IREG). Total load is calculated in Equation 3-6 and Equation 3-7. DS20005544A-page 9 SR086/SR087 3.10 EQUATION 3-6: I LOAD = I OUT + I REG The transient protector must be located before the bridge rectifier. The reason for this is to minimize capacitance to allow the rectified AC to fall below VOUT. EQUATION 3-7: P LOAD = V OUT  I OUT + I REG  3.9 Transient Protection Since there is no capacitor to absorb AC line transients, complete transient protection must be provided by the TVS or MOV device. Since the recommended IGBT is rated at 1.2 kV and the SR086/SR087 never see the full input voltage, the bridge rectifier becomes the limiting element when selecting an MOV. When using a 1 kV bridge, an MOV having a clamping voltage of greater than 1 kV is recommended. Uninterruptible Power Supply (UPS) The SR086/SR087 will not operate from a UPS with a square wave output. This type of output is usually referred to as “modified sine wave.” An RC network on the AC line, as shown in Figure 3-5 and Figure 3-6, affords additional protection from line transients as well as reducing conducted EMI. It does, however, reduce power supply efficiency. 10Ω, 3.0W 1.0A Wire Wound 90 to 270VAC 50/60Hz 275V 50A 1.0μF 240VAC X2 1.0kV 1.0A 200kΩ VOUT 9.0 - 50VDC @ 100mA - IREG STGD5NB120SZ 470μF 1.0μF 510kΩ R 1 = R2 100nF 200kΩ 510kΩ GATE VIN Enable FIGURE 3-5: VOUT -1 1.25V EN VGD VOUT SR086 GND FB VREG 3.3V @60mA 100nF R2 10.0kΩ SR086 Additional Transient Protection. 10Ω, 3.0W 1.0A Wire Wound 90 to 270VAC 50/60Hz 1.0μF 240VAC X2 1.0kV 1.0A VOUT 9.0 - 50VDC @ 100mA - IREG STGD5NB120SZ 275V 50A 470μF 1.0μF 200kΩ 510kΩ 100nF 200kΩ 510kΩ GATE VIN Enable FIGURE 3-6: DS20005544A-page 10 R1 = R2 EN VGD VOUT SR087 GND VOUT -1 1.25V FB 5.0V @60mA VREG 100nF R2 10.0kΩ SR087 Additional Transient Protection.  2017 Microchip Technology Inc. SR086/SR087 4.0 PACKAGING INFORMATION 4.1 Package Marking Information Legend: XX...X Y YY WW NNN e3 * Note: 8-lead SOIC Example XXXXXXX e3 YYWW NNN SR086SG e3 1725 615 8-lead SOIC Example XXXXXXX e3 YYWW NNN SR087SG e3 1735 612 Product Code or Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC® designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for product code or customer-specific information. Package may or not include the corporate logo.  2017 Microchip Technology Inc. DS20005544A-page 11 SR086/SR087 8-Lead SOIC (Narrow Body w/Heat Slug) Package Outline (SG) 4.90x3.90mm body, 1.70mm height (max), 1.27mm pitch D1 D 8 8 Exposed Thermal Pad Zone E2 E E1 Note 1 (Index Area D/2 x E1/2) 1 1 Top View Bottom View θ1 A View B h h A A2 Note 1 Seating Plane e A1 L b L1 L2 Gauge Plane θ Seating Plane A Side View View A - A View B Note: For the most current package drawings, see the Microchip Packaging Specification at www.microchip.com/packaging. Note: 1. ,IRSWLRQDOFKDPIHUIHDWXUHLVQRWSUHVHQWD3LQLGHQWL¿HUPXVWEHORFDWHGLQWKHLQGH[DUHDLQGLFDWHG7KH3LQLGHQWL¿HUFDQEHDPROGHGPDUN LGHQWL¿HUDQHPEHGGHGPHWDOPDUNHURUDSULQWHGLQGLFDWRU Symbol MIN Dimension NOM (mm) MAX A A1 A2 b 1.25* 0.00 1.25 0.31 - - - - 1.70 0.15 1.55* 0.51 D D1 E E1 E2 e 4.80* 3.30† 5.80* 3.80* 2.29† 4.90 - 6.00 3.90 - 5.00* 3.81† 6.20* 4.00* 2.79† 1.27 BSC h L 0.25 0.40 - - 0.50 1.27 L1 1.04 REF L2 0.25 BSC ș ș 0O 5O - - 8O 15O JEDEC Registration MS-012, Variation BA, Issue E, Sept. 2005. 7KLVGLPHQVLRQLVQRWVSHFL¿HGLQWKH-('(&GUDZLQJ ‚7KLVGLPHQVLRQGLIIHUVIURPWKH-('(&GUDZLQJ Drawings not to scale. DS20005544A-page 12  2017 Microchip Technology Inc. SR086/SR087 APPENDIX A: REVISION HISTORY Revision A (May 2017) • Converted and merged Supertex Doc #s DSFP-SR086 and DSFP-SR087 to Microchip DS20005544A • Changed the package marking format • Changed the quantity of the SG package from 3000/Reel to 3300/Reel • Made minor text changes all throughout the document  2017 Microchip Technology Inc. DS20005544A-page 13 SR086/SR087 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. PART NO. Device Devices: XX - Package Options SR086 X - Environmental = X Media Type Adjustable Offline Inductorless Switching Regulator with Additional 3.3V Internal Regulator SR087 = Adjustable Offline Inductorless Switching Regulator with Additional 5V Internal Regulator Package: SG = 8-lead SOIC (with Heat Slug) Environmental: G = Lead (Pb)-free/RoHS-compliant Package Media Type: (blank) = 3300/Reel for an SG Package DS20005544A-page 14 Examples: a) SR086SG-G: Adjustable Offline Inductorless Switching Regulator with Additional 3.3V Internal Regulator, 8-lead SOIC (with Heat Slug), 3300/Reel b) SR087SG-G: Adjustable Offline Inductorless Switching Regulator with Additional 5V Internal Regulator, 8-lead SOIC (with Heat Slug), 3300/Reel  2017 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. 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Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, CryptoAuthentication, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix, RightTouch logo, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2017, Microchip Technology Incorporated, All Rights Reserved. ISBN: 978-1-5224-1738-5 == ISO/TS 16949 ==  2017 Microchip Technology Inc. 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