Document
L6562A
Transition-mode PFC controller
Preliminary Data
Features
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Proprietary multiplier design for minimum thd Very accurate adjustable output overvoltage protection Ultra-low (30µA) Start-up current Low (2.5mA) quiescent current Digital leading-edge blanking on current sense Disable function on E/A input 1.4% (@ TJ = 25 °C) internal reference voltage -600/+800mA totem pole gate driver with active pull-down during UVLO and voltage clamp DIP-8/SO-8 packages
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DIP-8
SO-8
Applications
PFC pre-regulators for:
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IEC61000-3-2 compliant SMPS (Flat TV, desktop PC, games) HI-END AC-DC adapter/charger up to 400W Electronic ballast Entry level server & web server
www.DataSheet4U.com
Figure 1.
Block diagram
March 2007
Rev 1
1/20
www.st.com 20
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
Contents
L6562A
Contents
1 2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 2.2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 4 5 6
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1 6.2 6.3 6.4 6.5 Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Disable function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 THD optimizer circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Operating with no auxiliary winding on the boost inductor . . . . . . . . . . . . 12 Comparison between the L6562A and the L6562 . . . . . . . . . . . . . . . . . . 13
7 8 9 10
Application examples and ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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L6562A
Description
1
Description
The L6562A is a current-mode PFC controller operating in Transition Mode (TM). Coming with the same pin-out as its predecessors L6561 and L6562, it offers improved performance. The highly linear multiplier.