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    VIPer22A-E VIPer22ADIP-E, VIPer22AS-E Low power OFF-line SMPS primary switcher Features ■ Fixed 60 kHz switching frequency ■ 9 V to 38 V wide range VDD voltage ■ Current mode control ■ Auxiliary undervoltage lockout with hysteresis ■ High voltage start-up current source ■ Overtemperature, overcurrent and overvoltage protection with auto-restart Table 1. Typical power capability Mains type SO-8 European (195 - 265 Vac) US / wide range (85 - 265 Vac) 12 W 7W DIP-8 20 W 12 W Description The VIPer22A-E combines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip. Figure 1. Block diagram SO-8 DIP-8 Typical applications cover off line power supplies for battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor control, etc. The internal control circuit offers the following benefits: Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage. This feature is well adapted to battery charger adapter configurations. Automatic burst mode in low load condition. Overvoltage protection in HICCUP mode. DRAIN REGULATOR INTERNAL SUPPLY VDD FB _ 8/14.5V + + 42V _ ON/OFF 60kHz OSCILLATOR OVERTEMP. DETECTOR S R1 FF Q R2 R3 R4 PWM LATCH OVERVOLTAGE R LATCH S FF Q BLANKING + _ 0.23 V 1 kΩ 230 Ω SOURCE November 2010 Doc ID 12050 Rev 2 1/21 www.st.com 21 Contents Contents VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Pin connections and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 Rectangular U-I output characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 Wide range of VDD voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 Feedback pin principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 Startup sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.5 Overvoltage threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Operation pictures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 1 Electrical data Electrical data 1.1 1.2 Maximum ratings Stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute maximum rating Symbol Parameter Value Unit VDS(sw) VDS(st) ID VDD IFB VESD Switching drain source voltage (TJ = 25 ... 125 °C) (1) Start-up drain source voltage (TJ = 25 ... 125 °C) (2) Continuous drain current Supply voltage Feedback current Electrostatic discharge: Machine model (R = 0 Ω; C = 200 pF) Charged device model -0.3 ... 730 V -0.3 ... 400 V Internally limited A 0 ... 50 V 3 mA 200 V 1.5 kV TJ Junction operating temperature Internally limited °C TC Case operating temperature -40 to 150 °C Tstg Storage temperature -55 to 150 °C 1. This parameter applies when the start-up current source is OFF. This is the case when the VDD voltage has reached VDDon and remains above VDDoff. 2. This parameter applies when the start up current source is on. This is the case when the VDD voltage has not yet reached VDDon or has fallen below VDDoff. Thermal data Table 3. Thermal data Symbol Parameter SO-8 DIP-8 Unit RthJC Thermal resistance junction - case Max 25 15 °C/W RthJA Thermal resistance junction - ambient (1) Max 55 45 °C/W 1. When mounted on a standard single-sided FR4 board with 200 mm2 of Cu (at least 35 µm thick) connected to all DRAIN pins. Doc ID 12050 Rev 2 3/21 Electrical characteristics VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 2 Electrical characteristics TJ = 25 °C, VDD = 18 V, unless otherwise specified Table 4. Power section Symbol Parameter Test conditions BVDSS IDSS rDS(on) tf tr Drain-source voltage OFF state drain current Static drain-source ON state resistance Fall time Rise time ID = 1 mA; VFB = 2 V VDS = 500 V; VFB = 2 V; TJ = 125 °C ID = 0.4 A ID = 0.4 A; TJ = 100 °C ID = 0.2 A; VIN = 300 V (1) (See Figure 9 on page 13) ID = 0.4 A; VIN = 300 V (1) (See Figure 9 on page 13) COSS Drain capacitance 1. On clamped inductive load VDS = 25 V Min Typ Max Unit 730 V 0.1 mA 15 17 31 Ω 100 ns 50 ns 40 pF Table 5. Supply section Symbol Parameter Test conditions Min Typ Max Unit IDDch IDDoff IDD0 Start-up charging current 100 V ≤ VDS ≤ 400 V; VDD = 0 V ...VDDon (See Figure 10 on page 13) Start-up charging current in thermal shutdown VDD = 5 V; VDS = 100 V TJ > TSD - THYST Operating supply current not switching IFB = 2 mA -1 mA 0 mA 3 5 mA IDD1 Operating supply current switching DRST VDDoff Restart duty-cycle VDD undervoltage shutdown threshold VDDon VDD start-up threshold VDDhyst VDD threshold hysteresis VDDovp VDD overvoltage threshold IFB = 0.5 mA; ID = 50 mA (1) (See Figure 11 on page 13) (See Figure 10, Figure 11 on page 13) (See Figure 10, Figure 11 on page 13)) (See Figure 10 on page 13) 4.5 mA 16 % 7 8 9 V 13 14.5 16 V 5.8 6.5 7.2 V 38 42 46 V 1. These test conditions obtained with a resistive load are leading to the maximum conduction time of the device. 4/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Electrical characteristics Table 6. Oscillation section Symbol Parameter Test conditions FOSC Oscillator frequency total variation VDD = VDDoff ... 35 V; TJ = 0 ... 100 °C Table 7. PWM comparator section Symbol Parameter Test conditions GID IDlim IFBsd RFB td tb tONmin IFB to ID current gain Peak current limitation (See Figure 12 on page 14) VFB = 0 V (See Figure 12 on page 14) IFB shutdown current FB pin input impedance (See Figure 12 on page 14) ID = 0 mA (See Figure 12 on page 14) Current sense delay to turn-OFF ID = 0.4 A Blanking time Minimum turn-ON time Min Typ Max Unit 54 60 66 kHz Min Typ Max Unit 560 0.56 0.7 0.84 A 0.9 mA 1.2 kΩ 200 ns 500 ns 700 ns Table 8. Symbol TSD THYST Overtemperature section Parameter Test conditions Thermal shutdown temperature (See Figure 13 on page 14) Thermal shutdown hysteresis (See Figure 13 on page 14) Min Typ Max Unit 140 170 °C 40 °C Table 9. Typical power capability (1) Mains type SO-8 European (195 - 265 Vac) US / Wide range (85 - 265 Vac) 12 W 7W 1. Above power capabilities are given under adequate thermal conditions DIP-8 20 W 12 W Doc ID 12050 Rev 2 5/21 Pin connections and function VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 3 Pin connections and function Figure 2. Pin connection SOURCE 1 SOURCE 2 FB 3 VDD 4 8 DRAIN 7 DRAIN 6 DRAIN 5 DRAIN SO-8 SOURCE 1 SOURCE 2 FB 3 VDD 4 8 DRAIN 7 DRAIN 6 DRAIN 5 DRAIN DIP-8 Figure 3. Current and voltage conventions IDD ID VDD IFB DRAIN FB CONTROL VDD VD VFB VIPer22A SOURCE Table 10. Pin function Pin Name Pin function VDD SOURCE DRAIN FB Power supply of the control circuits. Also provides a charging current during start up thanks to a high voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the VDD voltage and provides two thresholds: - VDDon: Voltage value (typically 14.5 V) at which the device starts switching and turns off the start up current source. - VDDoff: Voltage value (typically 8 V) at which the device stops switching and turns on the start up current source. Power MOSFET source and circuit ground reference. Power MOSFET drain. Also used by the internal high voltage current source during start up phase for charging the external VDD capacitor. Feedback input. The useful voltage range extends from 0 V to 1 V, and defines the peak drain MOSFET current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin shorted to the SOURCE pin. 6/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 4 Operations Operations 4.1 Rectangular U-I output characteristics Figure 4. Rectangular U-I output characteristics for battery charger F1 AC IN T2 C3 - + D4 C4 C5 ISO1 C6 R1 C2 D1 D3 U1 FB VDD CONTROL VIPerX2A DRAIN SOURCE T1 C1 D2 C7 R2 D5 DCOUT U2 R3 Vcc R4 Vref R5 C8 C9 C10 - + + - GND R7 R8 TSM101 R10 R6 R9 GND A complete regulation scheme can achieve combined and accurate output characteristics. Figure 4. presents a secondary feedback through an optocoupler driven by a TSM101. This device offers two operational amplifiers and a voltage reference, thus allowing the regulation of both output voltage and current. An integrated OR function performs the combination of the two resulting error signals, leading to a dual voltage and current limitation, known as a rectangular output characteristic. This type of power supply is especially useful for battery chargers where the output is mainly used in current mode, in order to deliver a defined charging rate. The accurate voltage regulation is also convenient for Li-ion batteries which require both modes of operation. Doc ID 12050 Rev 2 7/21 Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 4.2 Wide range of VDD voltage The VDD pin voltage range extends from 9 V to 38 V. This feature offers a great flexibility in design to achieve various behaviors. In Figure 4 on page 7 a forward configuration has been chosen to supply the device with two benefits: ● As soon as the device starts switching, it immediately receives some energy from the auxiliary winding. C5 can be therefore reduced and a small ceramic chip (100 nF) is sufficient to insure the filtering function. The total start up time from the switch on of input voltage to output voltage presence is dramatically decreased. ● The output current characteristic can be maintained even with very low or zero output voltage. Since the TSM101 is also supplied in forward mode, it keeps the current regulation up whatever the output voltage is.The VDD pin voltage may vary as much as the input voltage, that is to say with a ratio of about 4 for a wide range application. 4.3 Feedback pin principle of operation A feedback pin controls the operation of the device. Unlike conventional PWM control circuits which use a voltage input (the inverted input of an operational amplifier), the FB pin is sensitive to current. Figure 5. presents the internal current mode structure. Figure 5. Internal current control structure 8/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations The Power MOSFET delivers a sense current Is which is proportional to the main current Id. R2 receives this current and the current coming from the FB pin. The voltage across R2 is then compared to a fixed reference voltage of about 0.23 V. The MOSFET is switched off when the following equation is reached: R2 ⋅ (IS + IFB) = 0.23V By extracting IS: IS = 0----.--2---3----V-R2 – IFB Using the current sense ratio of the MOSFET GID: ID = GID ⋅ IS = GID ⋅ ⎛ ⎝ 0----.--2---3----V-R2 – IFB⎠⎞ The current limitation is obtained with the FB pin shorted to ground (VFB = 0 V). This leads to a negative current sourced by this pin, and expressed by: IFB = –0----.--2---3----V-R1 By reporting this expression in the previous one, it is possible to obtain the drain current limitation IDlim: IDlim = GI D ⋅ 0.23 V ⋅ ⎛ ⎝ --1---R2 + -R-1---1-⎠⎞ In a real application, the FB pin is driven with an optocoupler as shown on Figure 5. which acts as a pull up. So, it is not possible to really short this pin to ground and the above drain current value is not achievable. Nevertheless, the capacitor C is averaging the voltage on the FB pin, and when the optocoupler is off (start up or short circuit), it can be assumed that the corresponding voltage is very close to 0 V. For low drain currents, the formula (1) is valid as long as IFB satisfies IFB < IFBsd, where IFBsd is an internal threshold of the VIPer22A. If IFB exceeds this threshold the device will stop switching. This is represented on Figure 12 on page 14, and IFBsd value is specified in the PWM COMPARATOR SECTION. Actually, as soon as the drain current is about 12 % of Idlim, that is to say 85 mA, the device will enter a burst mode operation by missing switching cycles. This is especially important when the converter is lightly loaded. Doc ID 12050 Rev 2 9/21 Operations Figure 6. IFB transfer function IDpeak IDlim VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E t--O-----N-----m------i--n----⋅---V-----1---I--N--L 85mA t--O-----N-----m------i--n----⋅---V-----2---I--N--L 0 Part masked by the IFBsd threshold IFB IFBsd It is then possible to build the total DC transfer function between ID and IFB as shown on Figure 6 on page 10. This figure also takes into account the internal blanking time and its associated minimum turn on time. This imposes a minimum drain current under which the device is no more able to control it in a linear way. This drain current depends on the primary inductance value of the transformer and the input voltage. Two cases may occur, depending on the value of this current versus the fixed 85 mA value, as described above. 10/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 4.4 Startup sequence Figure 7. Startup sequence Operations This device includes a high voltage start up current source connected on the drain of the device. As soon as a voltage is applied on the input of the converter, this start up current source is activated as long as VDD is lower than VDDon. When reaching VDDon, the start up current source is switched OFF and the device begins to operate by turning on and off its main power MOSFET. As the FB pin does not receive any current from the optocoupler, the device operates at full current capacity and the output voltage rises until reaching the regulation point where the secondary loop begins to send a current in the optocoupler. At this point, the converter enters a regulated operation where the FB pin receives the amount of current needed to deliver the right power on secondary side. This sequence is shown in Figure 7. Note that during the real starting phase tss, the device consumes some energy from the VDD capacitor, waiting for the auxiliary winding to provide a continuous supply. If the value of this capacitor is too low, the start up phase is terminated before receiving any energy from the auxiliary winding and the converter never starts up. This is illustrated also in the same figure in dashed lines. Doc ID 12050 Rev 2 11/21 Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 4.5 Overvoltage threshold An overvoltage detector on the VDD pin allows the VIPer22A to reset itself when VDD exceeds VDDovp. This is illustrated in Figure 8. which shows the whole sequence of an overvoltage event. Note that this event is only latched for the time needed by VDD to reach VDDoff, and then the device resumes normal operation automatically. Figure 8. Overvoltage sequence VDD VDDovp VDDon VDDoff t VDS t 12/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 5 Operation pictures Figure 9. Rise and fall time ID VDS 90% tfv 10% t trv t Figure 10. Start-up VDD current IDD IDD0 VDDhyst Operation pictures C L D C << Coss VDD FB CONTROL VIPer22A DRAIN SOURCE 300V IDDch VDDoff Figure 11. Restart duty-cycle VDDon VDD 100 V≤ VDS ≤ 400 V Fsw = 0 kHz VDD VDDon VDDoff tCH tST DRST = ---------t--S-----T---------tST + tCH 10 F t VDD FB CONTROL 2V VIPer22A DRAIN SOURCE 100V Doc ID 12050 Rev 2 13/21 Operation pictures VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Figure 12. Peak drain current vs feedback current ID IDpeak 4mH 100V 1/FOSC t 18V VDD FB CONTROL DRAIN IFB 47nF VIPer22A SOURCE 100V VFB IFBsd ⋅ RFB The drain current limitation is obtained for VFB = 0 V, and a negative current is drawn from the FB pin. See the Application section for further details. IFB IDpeak IDlim GID = –Δ----I--ΔD----I-p-F---e-B---a---k-- IFB 0 IFBsd Figure 13. Thermal shutdown 14/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Figure 14. Switching frequency vs temperature Operation pictures Figure 15. Current limitation vs temperature Doc ID 12050 Rev 2 15/21 Package mechanical data VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. 16/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Table 11. DIP-8 mechanical data Dim. A A1 A2 b b2 c D E E1 e eA eB L Package Weight Min. 0.38 2.92 0.36 1.14 0.20 9.02 7.62 6.10 2.92 Figure 16. Package dimensions Package mechanical data Databook (mm.) Nom. 3.30 0.46 1.52 0.25 9.27 7.87 6.35 2.54 7.62 3.30 Gr. 470 Max. 5.33 4.95 0.56 1.78 0.36 10.16 8.26 7.11 10.92 3.81 Doc ID 12050 Rev 2 17/21 Package mechanical data Table 12. SO-8 mechanical data Dim. A A1 Min. 1.35 0.10 A2 1.10 B 0.33 C 0.19 D 4.80 E 3.80 e H 5.80 h 0.25 L 0.40 k ddd Figure 17. Package dimensions VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Databook (mm. Nom. 1.27 8° (max.) Max. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 6.20 0.50 1.27 0.1 18/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 7 Order codes Table 13. Order codes Order codes VIPER22ASTR-E VIPer22AS-E VIPer22ADIP-E Package SO-8 SO-8 DIP-8 Order codes Packaging Tape and reel Tube Tube Doc ID 12050 Rev 2 19/21 Revision history 8 Revision history VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Table 14. Document revision history Date Revision 09-Feb-2006 1 Initial release. 25-Nov-2010 2 Updated Table 11. Changes 20/21 Doc ID 12050 Rev 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com Doc ID 12050 Rev 2 21/21

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