E-L6598 STMicroelectronics, E-L6598 Datasheet
E-L6598
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E-L6598 Summary of contents
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... High voltage resonant controller Description The device is manufactured with the BCD OFF LINE technology, able to ensure voltage ratings up to 600 V, making it perfectly suited for AC/DC Adapters and wherever a resonant topology can be beneficial. The device is intended to drive two power MOSFET, in the classical half bridge topology ...
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... Contents 1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Block diagram description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.1 High/low side driving section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.2 Timing and oscillator section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.3 Bootstrap section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.4 Op amp section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.5 Comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7 Ordering codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8 Revision history ...
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... T j Ambient temperature T amb 1. The device is provided of an internal clamping zener between GND and the Vs pin, It must not be supplied by a low impedance voltage source. Note: ESD immunity for pins 14, 15 and 16 is guaranteed up to 900 (human body model). Table 2. Thermal data ...
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... C = 1nF load Output duty cycle Minimum output C = 470pF; f oscillation frequency R = 50kΩ fmin Soft start output C = 470pF oscillation frequency 50kΩ; R Doc ID 6554 Rev 7 Min. Typ. 10 10.7 7.3 8 2.7 14.6 15.6 suvn 2 suvp = 580 V = 562 V 100 150 = 0 170 250 ...
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... Output resistance Source output current V = 4.5V out Sink output current V = 0.2V out Op amp input common mode range Sense op amp gain band (1) width product DC open loop gain Enabling comparator threshold Enabling comparator threshold Minimum pulse length Doc ID 6554 Rev 7 Electrical characteristics Min. ...
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... Soft start timing capacitor Soft start frequency setting - low impedance voltage source -see also C Oscillator frequency setting - see also R Minimum oscillation frequency setting - low impedance voltage source - see also C Sense op amp output - low impedance Sense op amp inverting input -high impedance Sense op amp non inverting input - high impedance ...
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... L6598 4 Timing diagram Figure 3. EN2 timing diagrams Figure 4. EN1 timing diagrams Doc ID 6554 Rev 7 Timing diagram 7/24 ...
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... Timing diagram Figure 5. Oscillator/output timing diagram 8/24 Doc ID 6554 Rev 7 L6598 ...
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... MOS are used. The internal logic ensures a minimum dead time to avoid cross-conduction of the power devices. 5.2 Timing and oscillator section The device is provided of a soft start function. It consists in a period of time, T the switching frequency shifts from fstart to fmin. This feature is explained in the following description (ref. fig.7 and fig.8). Figure 6. ...
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... In this way the soft start time depends only on the capacitor C constant (Soft start timing constant) is 0.15 s/μF. The current I is fed to the oscillator as shown in fig twice mirrored (x4 and x8) osc generating the triangular wave on the oscillator capacitor C structure of the oscillator (fig.7), a good relationship to compute an approximate value of the ...
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... L6598 The degree of approximation depends on the frequency value, but it remains very good in the range from 30 kHz to 100 kHz (figg.9-13) Figure 7. Oscillator block Doc ID 6554 Rev 7 Block diagram description 11/24 ...
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... Block diagram description Figure 8. Typ. f vs. R min fmin Figure 10. Typ vs. start min 470 pF fstar f 12/ 470 pF Figure 9. Figure 11. f Doc ID 6554 Rev 7 Typ vs start min fstar C = 470 different min f f L6598 ...
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... The diode connected in series to the DMOS has been added to avoid undesirable turn on of it. The introduction of the diode prevents any current can flow from the Vboot pin to the VS one in case that the supply is quickly turned off when the internal capacitor of the pump is not fully discharged ...
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... DMOS, and T semi-period of the switching frequency minus the dead time). The typical resistance value of the bootstrap DMOS is 150 Ω. For example using a power MOS with a total gate charge the drop on the bootstrap driver is about switching frequency of 200 kHz. In fact: Equation 9 ...
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... Short pulses ( 200 ns) on comparators input are recognized. The EN1 input (active high), has a threshold of 0.6 V (typical value) forces the device in a latched shut down state (e.g. LVG low, HVG low, oscillator stopped the under voltage conditions. Normal operating conditions are resumed after a power-off power-on sequence. The EN2 input (active high), with a threshold of 1 ...
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... Block diagram description Figure 16. Typ. fmin vs. temperature Figure 18. Typ. fstart vs. temperature 16/24 Figure 17. Start-up current vs temperature Figure 19. Quiescent current vs temperature Doc ID 6554 Rev 7 L6598 ...
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... L6598 Figure 20. Vs thresholds and clamp vs temp. Figure 22. LVG source and sink current vs. temperature Figure 21. HVG source and sink current vs. temperature Figure 23. Soft-start timing constant vs. temperature Doc ID 6554 Rev 7 Block diagram description 17/24 ...
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... Block diagram description Figure 24. Wide range AC/DC adapter application 18/24 Doc ID 6554 Rev 7 L6598 ...
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... L6598 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 trademark. Doc ID 6554 Rev 7 Package mechanical data ® 19/24 ...
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... Package mechanical data DIM 20/24 Plastic DIP-16 (0.25) MECHANICAL DATA mm. MIN. TYP MAX. 0.51 0.77 1.65 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 Doc ID 6554 Rev 7 L6598 inch MIN. TYP. MAX. 0.020 0.030 0.065 0.020 0.010 0.787 0.335 0.100 ...
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... Doc ID 6554 Rev 7 Package mechanical data inch MIN. TYP. MAX. 0.068 0.004 0.010 0.063 0.013 0.018 0.007 0.010 0.019 0.385 0.393 0.228 ...
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... Ordering codes 7 Ordering codes Table 6. Ordering information Order codes L6598 L6598D L6598D016TR 22/24 Package DIP16 SO16N Doc ID 6554 Rev 7 L6598 Packing Tube Tube Tape and reel ...
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... Revision Changed the impagination following the new release of “corporate 5 technical pubblication design guide”. Done a few of corrections in the text. Added ordering number fot the tape and reel version, updated 6 Table 4 on page 4 7 Updated Table 4 on page 4 Doc ID 6554 Rev 7 ...
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