VIPER53-E STMicroelectronics, VIPER53-E Datasheet
VIPER53-E
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VIPER53-E Summary of contents
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... Vac) 30W 40W PowerSO-10 Description The VIPer53-E combines an enhanced current mode PWM controller with a high voltage MDMesh Power Mosfet in the same package. Typical applications cover offline power supplies with a secondary power capability ranging up to 30W in wide range input voltage, or 50W in single ...
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... Secondary feedback configuration example . . . . . . . . . . . . . . . . . . . . 17 7 Current mode topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 9 High voltage Start-up current source . . . . . . . . . . . . . . . . . . . . . . . . . . 22 10 Short-circuit and overload protection . . . . . . . . . . . . . . . . . . . . . . . . . . 24 11 Transconductance error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 12 Special recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 13 Software implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 14 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 15 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 2/36 VIPer53 - E ...
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... VIPer53 - E 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 ...
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... V DD DDon DDovp ... 100°C J Min. Typ. 620 = 0V TOVL 0.9 (1) 100 (1) 50 170 (2) 60 according to the initial drain ton 1 DSon ---------------- 300 Min. Typ. 95 100 93 100 ; 9 4 VIPer53 - E Max. Unit V 150 µ Max. Unit 105 kHz 107 kHz V V ...
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... VIPer53 - E Table 5. Supply section Symbol Drain voltage starting V DSstart threshold I Startup charging current DDch1 I Startup charging current DDch2 Startup charging current I DDchoff in thermal shutdown Operating supply current I DD0 not switching Operating supply current I DD1 switching V undervoltage DD V DDoff shutdown threshold V V startup threshold ...
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... TOVL 1.6 1.9 250 1 Figure 6. 300 400 Figure 6. 100 150 450 600 250 350 0.5 Min. Typ. 4.35 ; DDreg 50 150 4 8 Min. Typ. 140 160 40 VIPer53 - E Max. Unit 2.3 V/A V 2 500 ns 200 ns 750 ns 450 ns V Max. Unit V 250 Max. Unit °C °C ...
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... VIPer53 - E 3 Pin connections and function Figure 1. Pin connection (top view) COMP 1 OSC 2 3 SOURCE 4 SOURCE Figure 2. Current and voltage conventions V 8 TOVL 7 VDD DRAIN DIP VDD I OSC OSC 15V TOVL DD I TOVL V OSC V TOVL V Pin connections and function ...
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... This action is delayed by the timing capacitor connected tothe TOVL pin. Allows the connection of an external capacitor for delaying the overload protection, TOVL which is triggered by a voltage on the COMP pin higher than 4.35V. OSC Allows the setting of the switching frequency through an external Rt-Ct network. 8/36 Pin function capacitor. DD VIPer53 - E ...
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... VIPer53 - E 4 Operation pictures Figure 3. Rise and fall time 90 10% Figure 4. Overloaded event t VDD OSC 15V t rv TOVL Normal Abnormal operation operation V DDon V DDoff V COMP V DIFFovl V TOVL V OVLth t OVL V DS Not switching Switching Operation pictures C<<C OSS ...
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... HYST DDon V COMP 10/36 current Figure DDoff DDon V = 100 kHz SW Figure 8. Automatic startup Blanking time COMPbl Overvoltage event DDovp Abnormal operation V COMP V DS Switching VIPer53 - E V COMPhi Not switching ...
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... VIPer53 - E Figure 9. Shutdown action V OSC V OSChi V OSClo V COMP V COMPoff I D Figure 11. Output characteristics I COMP I COMPhi 0 I COMPlo Figure 10. Comp pin gain and offset I Dpeak t I Dlim I Dmax t V COMPos t Slope = DDreg Operation pictures Slope = COMP V COMP V V COMPovl ...
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... Figure 12. Oscillator schematic The switching frequency settings shown on the graphic here below is valid within the following boundaries: R > 300kHz SW Figure 13. Oscillator settings Frequency (kHz) 12/36 Vcc VDD Rt OSC 320 Ct SOURCE 300 2.2nF 4.7nF 100 10nF 22nF PWM section 1nF 10 100 (K ) VIPer53 - E ...
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... VIPer53 - E Figure 14. Error amplifier test cpfiguration 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 15. Error amplifier transfer function Gain (dB) ...
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... Operation pictures Figure 16. Typical frequency variation vs. junction temperature Normalised Frequency Figure 17. Typical current limitation vs. junction temperature Normalised IDlim 1.04 1.02 0.98 0.96 14/36 1.04 1.02 1 0.98 0.96 - Temperature (° Temperature (°C) VIPer53 - 100 120 60 80 100 120 ...
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... The secondary voltage has to be adjusted through the turn ratio of the transformer between auxiliary and secondary. The error amplifier of the VIPer53 is a transconductance type: its output is a current proportional to the difference of voltage between the V reference (i.e., the error voltage). As the transconductance value is set at a relatively low ...
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... For higher power, 70kHz to 130kHz are generally chosen. The R5 compensation resistor value sets the dynamic behavior of the converter. It can be adjusted to provide the best compromise between stability and recovery time with fast load changes. 16/36 VIPer53 - E ...
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... VIPer53 - E 6 Secondary feedback configuration example Figure 19. Off line power supply with optocoupler feedback When a more accurate output voltage is needed, the way is to monitor it directly secondary side, and drive the PWM controller through an optocoupler as shown on The optocoupler is connected in parallel with the compensation network on the COMP pin. ...
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... R5 can be set to a fixed value offering the possibility of using soft start capacitor: When starting up the converter, the VIPer53 device delivers a constant current of 0 the COMP pin, creating a constant voltage of 0. and a rising slope across C7. This voltage shape, together with the operating range of 0 ...
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... VIPer53 - E 7 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 ...
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... F tb RST SWnom 2 remains below 0.5V (See COMP ), the blanking COMPbl Figure 6 on page 10 Figure 20 on page COMP (Point 3) in order to pass into burst which is the normal switching frequency set and finally resumes normal RST ------ - + VIPer53 - E The 21. equals ...
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... VIPer53 - E Equation 3 Where Ip(V COMPbl voltage of V COMPbl Note: The power point PSTBY where the converter is going into burst mode does not depend on the input voltage. The standby frequency F Equation 4 The ratio between the nominal and standby switching frequencies can be as high as 4, depending on the Lp value and input voltage ...
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... C VDD V DDhyst shows a typical start-up event reached, the charging current is reduced DDoff equal and the auxiliary winding delivers some DD DDon allows a fast complete start-up time t DDoff VIPer53 - E DDon Figure 19 on starts from 0V with a charging DD , and SDU of the DD ...
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... VIPer53 - E Figure 21. Start-up waveforms DD1 I DDch2 I DDch1 V tSS DD V DDreg V DDst V DDsd tSU High voltage Start-up current source t t 23/36 ...
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... Figure 8 on page = V is shown. The corresponding parameter I COMP COMPovl pin does not receive any DD must be kept as low as possible, without – 6 tss C I OVL DDch2 -------------------------------------- - V DDhyst must also be VDD 10. In Figure 10 on page 11 represents the Dmax VIPer53 - E and DDoff the value Dmax ...
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... VIPer53 - E 11 Transconductance error amplifier The VIPer53-E includes a transconductance error amplifier. Transconductance Gm is the change in output current I Equation 8 The output impedance Z Equation 9 This last equation shows that the open loop gain A Equation 10 where Gm value for VIPer53 is typically 1.4mA/ well defined by specification, but Z tolerances ...
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... A zero at higher frequency values then appears, due to the output BW2 OUT2 ----------------------------------------------------- - R = ---------------- - COMP P MAX 2 OUT R L2 Figure 18. Figure 24 Iexhibits a pole Figure 23. Its bandwidth pole. L2 Figure 24. For maximum and ESR zero OUT Gm 1 and MAX P 2 VIPer53 - E load LIM SW ...
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... VIPer53 - E The lowest load gives another condition for stability: The frequency F 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 C Equation OUT With --------------- OUT1 R The above formula gives a minimum value for C ...
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... Transconductance error amplifier Figure 23. Typical transfer functions 28/36 Gain (dB - 100 1k Frequency (Hz) Phase (°) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 10 100 1k Frequency (Hz) VIPer53 - E Rcomp=4.7k Ccomp=470nF 10k 100k 1M Rcomp=4.7k Ccomp=470nF 10k 100k 1M ...
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... VIPer53 - E Figure 24. Complete converter transfer function G(S) 1 ---------------------------------------------- - OUT 1 ---------------------------------------------- - OUT 1 F(S) --------------------------------------------------------------------------- - 2 R COMP 1 F(S).G( Transconductance error amplifier F 1 ----------------------------------------------------------- 2 ESR C OUT COMP 29/36 ...
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... Software implementation All the above considerations and some others are included included in ST design software which provides all of the needed components around the VIPer device for specified output configurations, and is available on 30/36 19 and 22. 17. www.st.com. VIPer53 - E Figure 18, ...
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... VIPer53 - E 14 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 ...
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... Package mechanical data Table 11. DIP8 mechanical data Ref Package Weight Figure 25. Package dimensions 32/36 Dimensions Databook (mm) Nom. Min 0.38 2.92 3.30 0.36 0.46 1.14 1.52 0.20 0.25 9.02 9.27 7.62 7.87 6.10 6.35 2.54 7.62 2.92 3.30 Gr. 470 VIPer53 - E Max 5.33 4.95 0.56 1.78 0.36 10.16 8.26 7.11 10.92 3.81 ...
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... VIPer53 - E Table 12. PowerSO-10 mechanical data Ref Figure 26. Package dimensions Dimensions Databook (mm) Nom. Min 3.35 0.00 0.40 0.35 9.40 7.40 9.30 7.20 7.20 6.10 5.90 1.27 1.25 13.80 0.50 1.20 1.70 0° Package mechanical data Max 3.65 0.10 0.60 0.55 9.60 7.60 9.50 7.40 7.60 6.35 6.10 1.35 14.40 1.80 8° 33/36 ...
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... Order codes 15 Order codes Table 13. Order codes Part Number VIPer53DIP-E VIPer53SP-E VIPer53SPTR - E 34/36 Package DIP-8 PowerSO-10 PowerSO-10 VIPer53 - E Shipment Tube Tube Tape and reel ...
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... VIPer53 - E 16 Revision history Table 14. Revision history Date 13-Nov-2006 Revision 1 Initial release. Revision history Changes 35/36 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 36/36 Please Read Carefully: © 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com VIPer53 - E ...