L6564D STMicroelectronics, L6564D Datasheet

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Features ■ Fast “bidirectional” input voltage feedforward 2 (1/V correction) ■ Accurate adjustable output overvoltage protection ■ Protection against feedback loop disconnection (latched shutdown) ■ Inductor saturation protection ■ AC brownout detection ■ Low (≤100 µA) start-up current ■ 6 ...

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Contents Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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L6564 List of table Table 1. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of figure List of figure Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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L6564 1 Description The L6564 is a current-mode PFC controller operating in transition mode (TM) and represents the compact version of L6563S as it embeds the same driver, reference and control stages in a very compact 10 pin SO package. ...

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Maximum ratings 2 Maximum ratings 2.1 Absolute maximum ratings Table 1. Absolute maximum ratings Symbol Vcc --- --- ZCD VFF pin Other pins 2.2 Thermal data Table 2. Thermal data ...

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L6564 3 Pin connection Figure 2. Pin connection Table 3. Pin description n° Name Inverting input of the error amplifier. The information on the output voltage of the PFC pre- regulator is fed into the pin through a resistor divider. ...

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Pin connection Table 3. Pin description (continued) n° Name PFC pre-regulator output voltage monitoring/disable function. This pin senses the output voltage of the PFC pre-regulator through a resistor divider and is used for protection purposes. If the voltage on the ...

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L6564 4 Electrical characteristics T = -25 to 125 ° MΩ between pin V FF Electrical characteristics Table 4. Symbol Parameter Supply voltage Vcc Operating range Vcc Turn-on threshold On Vcc Turn-off threshold Off Vcc ...

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Electrical characteristics Electrical characteristics (continued) Table 4. Symbol Parameter GB Gain-bandwidth product Source Current I COMP Sink Current Upper Clamp Voltage V Burst-mode Voltage COMP Lower Clamp Voltage Boost inductor saturation detector V Threshold on current sense CS_th I E/A ...

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L6564 Electrical characteristics (continued) Table 4. Symbol Parameter Voltage feedforward V Linear operation range VFF ΔV Dropout V -V MULTpk VFF ΔV Line drop detection thresh. VFF ΔV Line drop detection thresh. VFF R Internal discharge resistor DISCH V Disable ...

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Typical electrical performance 5 Typical electrical performance Figure 3. IC consumption vs V   100 10 1 Co=1nF f =70kHz Tj = 25°C 0.1 0.01 0. 001 Vcc [V ] Figure 5. Vcc Zener voltage vs ...

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L6564 Figure 7. Feedback reference vs T   2. 2. -50 - (C) Figure 9. UVLO saturation vs T   1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 ...

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Typical electrical performance Figure 11. Inductor saturation threshold vs T   1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 -50 - (C) Figure 13. ZCD sink/source capability vs T   ...

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L6564 Figure 15. R discharge vs T   -50 - (C) Figure 17 dropout vs T MULTpk VFF   ...

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Typical electrical performance Figure 20. Multiplier characteristics @   ...

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L6564 Figure 24. Gate drive output saturation vs T   -50 - (C) Figure 26. Start-up timer period vs T   450 400 350 300 250 200 150 ...

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Application information 6 Application information 6.1 Overvoltage protection Normally, the voltage control loop keeps the output voltage Vo of the PFC pre-regulator close to its nominal value, set by the ratio of the resistors R1 and R2 of the output ...

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L6564 6.2 Feedback failure protection (FFP) The OVP function above described handles “normal” over voltage conditions, i.e. those resulting from an abrupt load/line change or occurring at start-up. In case the overvoltage is generated by a feedback disconnection, for instance ...

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Application information Figure 28. Voltage feedforward: squarer-divider (1/V In this way a change of the line voltage will cause an inversely proportional change of the half sine amplitude at the output of the multiplier (if the line voltage doubles the ...

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L6564 The twice-mains-frequency (2 peak amplitude that, with good approximation, is given by: where f is the line frequency. The amount of 3rd harmonic distortion introduced by this L ripple, related to the amplitude of its 2 Figure 29 shows ...

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Application information 6.4 THD optimizer circuit The L6564 is provided with a special circuit that reduces the conduction dead-angle occurring to the AC input current near the zero-crossings of the line voltage (crossover distortion). In this way the THD (total ...

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L6564 Figure 31. THD optimization: standard TM PFC controller (left side) and L6564 (right side)   Rectified mains voltage Imains Input current Essentially, the circuit artificially increases the ON-time of the power switch with a positive offset added to the ...

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Application information However, in some applications such as ac-dc adapters, where the PFC pre-regulator is turned off at light load for energy saving reasons, even a well-designed boost inductor may occasionally slightly saturate when the PFC stage is restarted because ...

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L6564 6.6 Power management/housekeeping functions A communication line with the control IC of the cascaded dc-dc converter can be established via the disable function included in the PFC_OK pin (see “Feedback failure protection” section for more details). Typically this line ...

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Application information Table 5. Summary of L6564 idle states Condition Caused or revealed bey UVLO Feedback disconnected Standby AC Brownout OVP Low consumption Saturated boost inductor 26/33 IC behavior Vcc < Vcc Disabled Off PFC_OK > V PFC_OK_S AND Latched ...

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L6564 7 Application examples and ideas Figure 34. Demonstration board EVL6564-100W, wide-range mains: electrical schematic Application examples and ideas Doc ID 16202 Rev 2 27/33 ...

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Application examples and ideas Figure 35. L6564 100 W TM PFC: compliance to EN61000-3-2 standard   Meas ured value 1 0.1 0.01 0.001 0.0001 ...

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L6564 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 at: www.st.com. ...

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Package mechanical data Figure 39. SSO10 package dimensions 30/33 Doc ID 16202 Rev 2 L6564 8140761 rev. A ...

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... L6564 9 Ordering codes Table 7. Ordering information Order codes L6564D L6564DTR Package SSO10 Doc ID 16202 Rev 2 Ordering codes Packing Tube Tape and reel 31/33 ...

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Revision history 10 Revision history Table 8. Document revision history Date 08-Sep-2009 23-Dec-2010 32/33 Revision 1 Initial release. Updated: Figure 1, Figure 2 Table 5, Chapter 6.2, Doc ID 16202 Rev 2 Changes 19, Figure 27, Figure 29, Table Chapter ...

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... L6564 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. ...