VIPer53 - E OFF-line primary switch General features Type European (195 - 265Vac) US / Wide range (85 - 265 Vac) DIP-8 50W 30W PowerSO-10TM 65W 40W PowerSO-10 DIP-8 Features Description ■ Switching frequency up to 300kHz ■ Current limitation ■ Current mode control with adjustable limitation ■ Soft start and shut-down control ■ Automatic burst mode in standby condition (“Blue Angel“ compliant ) ■ Undervoltage lockout with Hysteresis ■ HIgh voltage star-tup current source ■ Overtempe
Contents VIPer53 - E Contents 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIPer53 - E Electrical data 1 Electrical data 1.1 Maximum rating 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.
Electrical characteristics 2 VIPer53 - E Electrical characteristics TJ = 25°C, VDD = 13V, unless otherwise specified Table 3. Symbol BVDSS IDSS RDS(on) Power section Parameter Test conditions Drain-source voltage ID = 1mA; VCOMP = 0V Off state drain current Static drain-source On state resistance Min. Typ. Max. Unit 620 V VDS = 500V; VCOMP = 0V; TJ = 125°C 150 µA 1 1.7 Ω Ω ID = 1A; VCOMP = 4.5V; VTOVL = 0V TJ = 25°C 0.9 TJ = 100°C tfv Fall time ID = 0.
VIPer53 - E Electrical characteristics Table 5. Symbol Supply section Parameter Test conditions Min. Typ. Max. Unit Drain voltage starting threshold VDD = 5V; IDD = 0mA 34 IDDch1 Startup charging current VDD = 0 ... 5V; VDS = 100V Figure 5 on page 10 -12 mA IDDch2 Startup charging current VDD = 10V; VDS = 100VFigure 5. -2 mA IDDchoff Startup charging current in thermal shutdown VDD = 5V; VDS = 100VFigure 7.
Electrical characteristics Table 7. Symbol HCOMP VIPer53 - E PWM comparator section Parameter ∆VCOMP / ∆IDPEAK VCOMPos VCOMP Offset Test conditions VCOMP = 1 ... 4 V Figure 10. dID/dt = 0 Typ. Max. Unit 1.7 2 2.3 V/A dID/dt = 0 Figure 10. on page 11 IDlim Peak drain current limitation ICOMP = 0mA; VTOVL = 0V Figure 10. dID/dt = 0 IDmax Drain current capability VCOMP = VCOMPovl; VTOVL = 0V dID/dt = 0 td Min. 0.5 V 1.7 2 2.3 A 1.6 1.9 2.
VIPer53 - E 3 Pin connections and function Pin connections and function Figure 1. Pin connection (top view) COMP 1 8 TOVL OSC 2 7 VDD SOURCE 3 6 NC SOURCE 4 5 DRAIN DIP-8 Figure 2.
Pin connections and function Table 10. Pin function Pin Name Pin function VDD Power supply of the control circuits. Also provides the charging current of the external capacitor during start-up. The functions of this pin are managed by four threshold voltages: - VDDon: Voltage value at which the device starts switching (Typically 11.5 V). - VDDoff: Voltage value at which the device stops switching (Typically 8.4 V). - VDDreg: Regulation voltage point when working in primary feedback (Trimmed to 15 V).
VIPer53 - E 4 Operation pictures Operation pictures Figure 3. Rise and fall time ID C<
Operation pictures Figure 5. VIPer53 - E Start-up VDD current Figure 6. Blanking time tb IDD IDD0 tb1 VDDhyst VDDoff VDDon VDD IDDch2 VDS = 100 V FSW = 0 kHz tb2 IDDch1 VCOMPbl Figure 7. Thermal shutdown Figure 8.
VIPer53 - E Operation pictures Figure 9. Shutdown action Figure 10. Comp pin gain and offset VOSC VOSChi VOSClo IDpeak t VCOMP IDlim IDmax Slope = 1 / HCOMP VCOMPoff t ID VCOMP VCOMPos VCOMPovl VCOMPhi t Figure 11.
Operation pictures VIPer53 - E Figure 12. Oscillator schematic Vcc VDD Rt OSC PWM section 320 Ω Ct SOURCE The switching frequency settings shown on the graphic here below is valid within the following boundaries: Rt > 2kΩ FSW = 300kHz Figure 13. Oscillator settings Frequency (kHz) 300 2.2nF 1nF 4.
VIPer53 - E Operation pictures Figure 14. Error amplifier test cpfiguration Vin VDD DRAIN OSC 15V TOVL COMP SOURCE Vout R 2.5 V This configuration is for test purpose only. In order to insure a correct stability of the error amplifier, a capacitor of 10nF (minimum value: 8nF) should be always connected between COMP pin and ground. See figures Figure 18, 19 and 22. Figure 15. Error amplifier transfer function Gain (dB) 60 Open 40 R = 10 kΩ 20 R = 2.
Operation pictures VIPer53 - E Figure 16. Typical frequency variation vs. junction temperature Normalised Frequency 1.04 1.02 1 0.98 0.96 -20 0 20 40 60 80 100 120 Temperature (°C) Figure 17. Typical current limitation vs. junction temperature Normalised IDlim 1.04 1.02 1 0.98 0.
VIPer53 - E 5 Primary regulation configuration example Primary regulation configuration example Figure 18. Off line power supply with auxiliary supply feedback F1 C1 AC IN D1 T1 C2 R1 R2 C3 T2 D2 L1 D4 D3 R4 C8 C9 DC OUT U1 VIPer73 R3 VDD DRAIN C10 OSC 15V TOVL C4 COMP R6 1k C5 SOURCE R5 C11 10nF C6 C7 The schematic on Figure 18 delivers a fixed output voltage by using the internal error amplifier of the device in a primary feedback configuration.
Primary regulation configuration example VIPer53 - E The switching frequency can be set to any value through the choice of R3 and C5. This allows to optimize the efficiency of the converter by adopting the best compromise between switching losses, EMI (Lower with low switching frequencies) and transformer size (Smaller with high switching frequencies). For an output power of a few watts, typical switching frequencies between 20kHz and 40kHz because of the small size of the transformer.
VIPer53 - E 6 Secondary feedback configuration example Secondary feedback configuration example Figure 19.
Secondary feedback configuration example VIPer53 - E Since the dynamic characteristics of the converter are set on the secondary side through components associated to U3, the compensation network has only a role of gain stabilization for the optocoupler, and its value can be freely chosen. R5 can be set to a fixed value of 1kΩ, offering the possibility of using C7 as a soft start capacitor: When starting up the converter, the VIPer53 device delivers a constant current of 0.
VIPer53 - E 7 Current mode topology Current mode topology The VIPer53-E implements the conventional current mode control method for regulating the output voltage. This kind of feedback includes two nested regulation loops: The inner loop controls the peak primary current cycle by cycle. When the Power MOSFET output transistor is on, the inductor current (primary side of the transformer) is monitored with a SenseFET technique and converted into a voltage.
Standby mode 8 VIPer53 - E Standby mode The device offers a special feature to address the low load condition. The corresponding function described hereafter consists of reducing the switching frequency by going into burst mode, with the following benefits: – It reduces the switching losses, thus providing low consumption on the mains lines. The device is compliant with “Blue Angel” and other similar standards, requiring less than 0.5 W of input power when in standby.
VIPer53 - E Standby mode Equation 3 1 2 P STBY = --- • F SWnom • Ip ( V COMPbl ) • Lp 2 Where Ip(VCOMPbl2) is the peak Power MOSFET current corresponding to a compensation voltage of VCOMPbl (1V). Note: The power point PSTBY where the converter is going into burst mode does not depend on the input voltage.
High voltage Start-up current source 9 VIPer53 - E High voltage Start-up current source An integrated high voltage current source provides a bias current from the DRAIN pin during the start-up phase. This current is partially absorbed by internal control circuits in standby mode with reduced consumption, and also supplies the external capacitor connected to the VDD pin.
VIPer53 - E High voltage Start-up current source Figure 21.
Short-circuit and overload protection 10 VIPer53 - E Short-circuit and overload protection A VCOMPovl threshold of about 4.35V has been implemented on the COMP pin. When VCOMP goes above this level, the capacitor connected on the TOVL pin begins to charge. When reaching typically VOVLth (4V), the internal MOSFET driver is disabled and the device stops switching. This state is latched because of to the regulation loop which maintains the COMP pin voltage above the VCOMPovl threshold.
VIPer53 - E 11 Transconductance error amplifier Transconductance error amplifier The VIPer53-E includes a transconductance error amplifier. Transconductance Gm is the change in output current ICOMP versus change in input voltage VDD.
Transconductance error amplifier VIPer53 - E optocoupler, the internal error amplifier is fully used for regulation). A typical schematic corresponding to this situation can be seen on Figure 18. The transfer function of the power cell is represented as G(s) in Figure 24 Iexhibits a pole which depends on the output load and on the output capacitor value. As the load of a converter may change, two curves are shown for two different values of output resistance value, RL1 and RL2.
VIPer53 - E Transconductance error amplifier The lowest load gives another condition for stability: The frequency FBW1 must not encounter the second order slope generated by the load pole and the integrator part of the error amplifier. This condition can be met by adjusting the CCOMP value: Equation 13 R L1 ⋅ C OUT C COMP > ------------------------------------------------------ ⋅ 2 6.
Transconductance error amplifier VIPer53 - E Figure 23. Typical transfer functions Gain (dB) 60 Rcomp=4.7k Ccomp=470nF 50 40 30 20 10 0 -10 1 10 100 1k 10k 100k 1M Frequency (Hz) Phase (°) 0 Rcomp=4.
VIPer53 - E Transconductance error amplifier Figure 24. Complete converter transfer function G(S) 1 ----------------------------------------------π⋅ R ⋅ C L1 OUT 1 ----------------------------------------------π⋅ R ⋅ C L2 OUT F 1 1 ----------------------------------------------------------2 ⋅ π ⋅ ESR ⋅ C OUT F(S) 1 ---------------------------------------------------------------------------2⋅ π⋅ R ⋅ C COMP COMP FC F 1 F(S).
Special recommendations 12 VIPer53 - E Special recommendations As steted in the error amplifier section, a capacitor of 10nF capacitor (minimum value: 8nF) should always be connected to the COMP pin to ensure correct stability of the internal error amplifier Figure 18, 19 and 22. In order to improve the ruggedness of the device versus eventual drain overvoltages, a resistance of 1kΩ should be inserted in series with the TOVL pin, as shown on Figure 18, Figure 19 on page 17.
VIPer53 - E 14 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark.
Package mechanical data Table 11. VIPer53 - E DIP8 mechanical data Dimensions Databook (mm) Ref. Nom. Min A 5.33 A1 0.38 A2 2.92 3.30 4.95 b 0.36 0.46 0.56 b2 1.14 1.52 1.78 c 0.20 0.25 0.36 D 9.02 9.27 10.16 E 7.62 7.87 8.26 E1 6.10 6.35 7.11 e 2.54 eA 7.62 eB L 10.92 2.92 Package Weight Figure 25. Package dimensions 32/36 Max 3.30 Gr. 470 3.
VIPer53 - E Package mechanical data Table 12. PowerSO-10 mechanical data Dimensions Databook (mm) Ref. Nom. A Min 3.35 Max 3.65 A1 0.00 0.10 B 0.40 0.60 c 0.35 0.55 D 9.40 9.60 D1 7.40 7.60 E 9.30 9.50 E1 7.20 7.40 E2 7.20 7.60 E3 6.10 6.35 E4 5.90 6.10 e 1.27 F 1.25 H 13.80 h L 14.40 0.50 1.20 q α 1.35 1.80 1.70 0° 8° Figure 26.
Order codes 15 VIPer53 - E Order codes Table 13.
VIPer53 - E 16 Revision history Revision history Table 14. Revision history Date Revision 13-Nov-2006 1 Changes Initial release.
VIPer53 - 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.
