L6566BHTR STMicroelectronics

+ L6566BH Multimode controller for SMPS Datasheet production data Features Selectable multimode operation: fixed frequency or quasi-resonant On-board 840 V high voltage startup Advanced light load management Low quiescent current (< 3 mA) SO16N Adaptive UVLO Line feedforward for constant power capability -600/+800 mA totem pole gate driver with vs. mains voltage active pull-down during UVLO Pulse-by-pulse OCP, shutdown on overload SO16N package (latched or auto-restart) Transformer saturation detection Applications Programmable frequency modulation for EMI Industrial SMPS reduction SMPS running off rectified 3-phase input line Latched or auto-restart OVP Brownout protection Figure 1. Block diagram VREF SS COMP VFF 10 14 915 V CC 6.4V TIME OVPL OVP 1 SOFT-START OUT OFF2 LOW CLAMP I charge HV & & DISABLE FAULT MNGT 7.7V LINE VOLTAGE Q FEEDFORWARD IHV Ref erence VOLTAGE voltages CS REGULATOR Internal supply LEB VCC & 5 7 ADAPTIVE UVLO UVLO 1.5 V - + - + +- Vth PWM OCP VCC VCC UVLO SHF 400 uA + 6 FMOD Hiccup-mode - - 14V OCP logic 5.7V BURST-MODE + OCP2 4 GD OSC 13 OSCILLATOR R Q DRIVER MODE SELECTION S & MODE/SC 12 TURN-ON LOGIC TIME ZERO CURRENT 50 mV OUT OVPL - DETECTOR 100 mV ZCD + 4.5V OFF2 11 OVP OVERVOLTAGE LATCH PROTECTION DIS 8 IC LATCH 16 - AC OK AC FAIL DISABLE 15 A 0.450V 3 V + UVLO 0.485V 3 April 2012 Doc ID 16610 Rev 2 1/51 This is information on a product in full production. www.st.com 51 + - -Contents L6566BH Contents 1 Description . 6 2 Pin settings 8 2.1 Connections 8 2.2 Pin description 8 3 Electrical data . 11 3.1 Maximum rating 11 3.2 Thermal data 11 4 Electrical characteristics 12 5 Application information . 16 5.1 High voltage startup generator . 17 5.2 Zero-current detection and triggering block oscillator block 19 5.3 Burst-mode operation at no load or very light load 22 5.4 Adaptive UVLO . 23 5.5 PWM control block 24 5.6 PWM comparator, PWM latch and voltage feedforward blocks 25 5.7 Hiccup-mode OCP 28 5.8 Frequency modulation . 29 5.9 Latched disable function 31 5.10 Soft-start and delayed latched shutdown upon overcurrent . 32 5.11 OVP block . 33 5.12 Brownout protection . 36 5.13 Slope compensation . 39 5.14 Summary of L6566BH power management functions . 39 6 Application examples and ideas 43 2/51 Doc ID 16610 Rev 2