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L6566ATR Datasheet(PDF) 1 Page - STMicroelectronics |
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L6566ATR Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 51 page  May 2008 Rev 2 1/51 51 L6566A Multi-mode controller for SMPS with PFC front-end Features ■ Selectable multi-mode operation: fixed frequency or quasi-resonant ■ On-board 700 V high-voltage start-up ■ Advanced light load management ■ Low quiescent current (< 3 mA) ■ Adaptive UVLO ■ Line feedforward for constant power capability vs mains voltage ■ Pulse-by-pulse OCP, shutdown on overload (latched or autorestart) ■ Transformer saturation detection ■ Switched supply rail for PFC controller ■ Latched or autorestart OVP ■ Brownout protection ■ -600/+800 mA totem pole gate driver with active pull-down during UVLO ■ SO16N package Applications ■ Notebook, TV and LCD monitors adapters ■ High power chargers ■ PDP/LCD TV ■ Consumer appliances, like DVD, VCR, set-top box ■ IT equipment, games, aux. power supplies ■ Power supplies in excess of 150 W SO16N www.st.com Figure 1. Block diagram + - + - ZERO CURRENT DETECTOR 50 mV 100 mV VCC 915 7 ZCD COMP VFF CS GD 4 11 GND 3 LINE VOLTAGE FEEDFORWARD 1.5 V + - 4.5V DIS 8 LATCH LEB 14V Ref erence voltages 5 VCC 10 Internal supply VREF UVLO VOLTAGE REGULATOR & ADAPTIVE UVLO Vcc_PFC 6 IC_LATCH DISABLE UVLO IC_LATCH Q 12 + - AC_FAIL 13 AC_FAIL UVLO_SHF VCC 5.7V 1 HV SOFT-START & FAULT MNGT 14 SS OSC MODE/SC +- OSCILLATOR R S Q MODE SELECTION & TURN-ON LOGIC OVERVOLTAGE PROTECTION 7.7V OCP PWM TIME OUT TIME OUT + - Vth BURST-MODE LOW CLAMP & DISABLE OFF2 OFF2 IHV Hiccup-mode OCP logic 400 uA DRIVER OCP2 6.4V VCC Icharge OVPL OVP OVPL OVP OCP2 + - 0.450V 0.485V AC_OK 16 15 µA 3 V |
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