L6562 STMICROELECTRONICS | Alldatasheet
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Technical content
1.1 APPLICATIONS
2 Description
Figure 2. Block Diagram Figure 1. Packages Table 1. Order Codes
2 Description (continued)
wide-range-mains operation with an extremely low THD, even over a large load range. 25°C) internal voltage reference. norms (Blue Angel, EnergyStar, Energy2000, etc.). tion for EN61000-3-2 compliant SMPS's up to 300W. Table 2. Absolute Maximum Ratings Figure 3. Pin Connection (Top view) Table 3. Thermal Data
Table 4. Pin Description regulator is fed into the pin through a resistor divider. #1) to achieve stability of the voltage control loop and ensure high power factor and low THD. divider and provides the sinusoidal reference to the current loop. reference, generated by the multiplier, to determine MOSFET’s turn-off. edge triggers MOSFET’s turn-on. 6 GND Ground. Current return for both the signal part of the IC and the gate driver. limit is extended to 22V min. to provide more headroom for supply voltage changes. Table 5. Electrical Characteristics
(3) Parameters guaranteed by design, functionality tested in production. Table 5. Electrical Characteristics (continued)
3 Typical Electrical Characteristics
Figure 4. Supply current vs. Supply voltage Figure 5. Start-up & UVLO vs. Tj Figure 6. IC consumption vs. Tj Figure 7. Vcc Zener voltage vs. Tj
Figure 20. Gate-drive clamp vs. Tj Figure 21. UVLO saturation vs. Tj
4 Application Information
4.1 Overvoltage protection
advantage is the precision: the tolerance of the detection current is 12%, that is 12% tolerance on ∆Vo. Since ∆Vo << Vo, the tolerance on the absolute value will be proportionally reduced. erance on the OVP level due to the L6562 will be 40·0.12=4.8V, that is 1.2% of the regulated value.
ear region. As a result, the L6562 will work in burst-mode, with a repetition rate that can be very low. of the Vcc capacitor and increase the hold-up capability of the IC supply system.
4.2 THD optimizer circuit
Harmonic Distortion) of the current is considerably reduced. reverse-biased and the input current flow to temporarily stop. Figure 22. THD optimization: standard TM PFC controller (left side) and L6562 (right side) waveforms of a standard TM PFC controller are compared to those of the L6562.
Figure 25. EVAL6562-80W: PCB and component layout (Top view, real size: 57 x 108 mm) Table 6. EVAL6562N: Evaluation results at full load Table 7. EVAL6562N: Evaluation results at half load
Table 8. EVAL6562N: No-load measurements Figure 26. Line filter (not tested for EMI compliance) used for EVAL6562N evaluation
5 Package Information
ECOPACK specifications are available at: www.st.com. Figure 27. DIP-8 Mechanical Data & Package Dimensions
Figure 28. SO-8 Mechanical Data & Package Dimensions 0.15mm (.006inch) in total (both side).
6 Revision History
Table 9. Revision History Changed input of the power amplifier connected to Multiplier (Fig. 2). May 2005 7 Modified Table 2: Absolute Maximim Ratings. November 2005 8 Added in Section 5 the ECOPACK® certicate of conformity.
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