EVLVIP27L-12WS STMicroelectronics, EVLVIP27L-12WS Datasheet
EVLVIP27L-12WS
Specifications of EVLVIP27L-12WS
Related parts for EVLVIP27L-12WS
EVLVIP27L-12WS Summary of contents
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Features ■ 800 V avalanche rugged power section ■ PWM operation with frequency jittering for low EMI ■ Operating frequency: – 60 kHz for L type – 115 kHz for H type ■ Standby power < 265 ...
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Contents Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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VIPER27 1 Block diagram Figure 2. Block diagram BRth 15uA SOFT START CONT . OVP LOGIC 6uA OVP FB 2 Typical power Table 2. Typical power Part number Adapter VIPER27 1. Typical continuous power in non ...
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Pin settings 3 Pin settings Figure 3. Connection diagram (top view) Note: The copper area for heat dissipation has to be designed under the DRAIN pins. Table 3. Pin description Pin n. DIP7 SO16N 1 1... ...
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VIPER27 4 Electrical data 4.1 Maximum ratings Table 4. Absolute maximum ratings Symbol V Drain-to-source (ground) voltage DRAIN Repetitive avalanche energy E AV (limited by T Repetitive avalanche current I AR (limited Pulse drain current (limited by ...
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Electrical data 4.3 Electrical characteristics (T = -25 to 125 ° Table 6. Power section Symbol Parameter V Break-down voltage BVDSS I OFF state drain current OFF Drain-source on state R DS(on) resistance Effective (energy related) C OSS ...
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VIPER27 Table 8. Controller section Symbol Parameter Feed-back pin V Over load shutdown threshold FBolp V Linear dynamics upper limit FBlin V Burst mode threshold FBbm V Burst mode hysteresis FBbmhys I Feed-back sourced current FB R Dynamic resistance FB(DYN) ...
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Electrical data Table 8. Controller section (continued) Symbol Parameter Brown out protection V Brown out threshold BRth V Voltage hysteresis above V BRhyst I Current hysteresis BRhyst V Clamp voltage BRclamp V Brown out disable voltage DIS Thermal shutdown T ...
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VIPER27 Figure 4. Minimum turn-on time test circuit 14 V Figure 5. Brown out threshold test circuit 14 V Figure 6. OVP threshold test circuit 14 V Note: Adjust V above V DD GND DRAIN VDD DRAIN 50 Ω CONT ...
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Typical electrical characteristics 5 Typical electrical characteristics Figure 7. Current limit vs T Figure 9. Drain start voltage vs T Figure 11. Brown out threshold vs T 10/31 Figure 8. Switching frequency Figure 10. HFB vs T ...
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VIPER27 Figure 13. Brown out hysteresis current vs T Figure 15. Operating supply current (switching Figure 17. Power MOSFET on-resistance vs T Figure 14. Operating supply current J Figure 16. current limit Figure 18. Power ...
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Typical electrical characteristics Figure 19. Thermal shutdown DDon V DDoff V DD(RESTART) I DRAIN HYST SD Normal operation 12/31 Shut down after over temperature Doc ID 15133 Rev 5 VIPER27 ...
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VIPER27 6 Typical circuit Figure 20. Min-features flyback application Figure 21. Full-features flyback application Vcc DRAIN CONTROL CONT FB ...
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Operation descriptions 7 Operation descriptions is a high-performance low-voltage PWM controller chip with an 800 V, avalanche VIPER27 rugged Power section. The controller includes: the oscillator with jittering feature, the start up circuits with soft-start feature, the PWM logic, the ...
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VIPER27 7.3 Power-up and soft-start up If the input voltage rises up till the device start threshold, V begins to grow due to the I high voltage start up circuit. If the V page 6 ) the power MOSFET starts ...
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Operation descriptions Figure 23. Timing diagram: normal power-up and power-down sequences DRAIN_START DDon V DDoff V DD(RESTART) V DRAIN (3mA) DDch Figure 24. Soft-start: timing diagram 16/31 Normal operation Power-on I ...
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VIPER27 7.4 Power down operation At converter power down, the system loses regulation as soon as the input voltage is so low that the peak current limitation is reached. The V the V threshold (see DDoff energy transfers to the ...
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Operation descriptions 7.7 Current mode conversion with adjustable current limit set point The device is a current mode converter: the drain current is sensed and converted in voltage that is applied to the non inverting pin of the PWM comparator. ...
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VIPER27 Where: ● the OVP threshold (see OVP ● the converter output voltage value to activate the OVP set by designer OUT OVP ● the auxiliary winding turns AUX ● the secondary ...
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Operation descriptions 7.9 About CONT pin Referring to the Figure 27 1. Current limit set point 2. Over voltage protection on the converter output voltage The Table 9 on page 20 activate one or plus of the CONT pin functions. ...
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VIPER27 When the feedback pin voltage reaches the threshold V starts to charge the feedback capacitor (C threshold, the converter is turned off and the start up phase is activated with reduced V FBolp value 0.6 mA, ...
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Operation descriptions Equation 7 Equation 8 The R is the dynamic resistance seen by the FB pin. FB(DYN) The C capacitor fixes the OLP delay and usually C FB1 The Equation 5 can be still used to calculate the OLP ...
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VIPER27 7.11 Burst-mode operation at no load or very light load When the load decrease the feedback loop reacts lowering the feedback pin voltage falls down the burst mode threshold, V switched on. After the MOSFET stops, as ...
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Operation descriptions Figure 31. Brown-out protection: BR external setting and timing diagram DIS BRth I BRhyst Rl Fixed the V and the V INon can be established for the calculation of the resistors R ...
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VIPER27 nd 7.13 2 level over current protection and hiccup mode The is protected against short circuit of the secondary rectifier, short circuit on the VIPER27 secondary winding or a hard-saturation of fly-back transformer. Such as anomalous condition is invoked ...
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Package mechanical data 8 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 ...
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VIPER27 Figure 33. Package dimensions Doc ID 15133 Rev 5 Package mechanical data 27/31 ...
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Package mechanical data Table 11. SO16 narrow mechanical data Dim ccc 28/31 mm Min. Typ. 0.1 1.25 0.31 0.17 9.8 9.9 5.8 6 3.8 3.9 1.27 0.25 0.4 ...
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VIPER27 Figure 34. SO16 narrow mechanical data Doc ID 15133 Rev 5 Package mechanical data 29/31 ...
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Revision history 9 Revision history Table 12. Document revision history Date 16-Jan-2009 20-Jul-2009 22-Oct-2009 16-Jun-2010 30-Jul-2010 30/31 Revision 1 Initial release 2 Added SO16 narrow package. 3 Updated Table 5 on page 5 Figure 3 on page 4 4 Updated ...
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