L6591 STMicroelectronics

L6591 PWM controller for ZVS half bridge Datasheet production data Features Complementary PWM control for soft-switched half bridge with programmable deadtime Up to 500 kHz operating frequency SO16 narrow Onboard high-voltage startup SO16 4% precision external reference Advanced light load management 600 V-rail compatible high-side gate driver with Adaptive UVLO integrated bootstrap diode and high dV/dt Pulse-by-pulse OCP immunity OLP (latched or autorestart) SO16N package Transformer saturation detection Interface with PFC controller Applications Latched disable input High power AC-DC adapter/charger Input for power-on sequencing or brownout Desktop PC, entry-level server protection Telecom SMPS Programmable soft-start Figure 1. Block diagram HV VCC 16 9 5 CLK OSC TIMING 25 V Vref HV generator ON/O FFand VREG 6 adaptive UV LOmanagement VREF Vcc OK 2 Low R DIS Sync hronous + UVLO S Q bootstra p diode 4.5V - DIS 15 BOOT 1.5V HICCUP - BLANKI NG S Q 14 PWM CTL + ISEN LEVEL R HVG 3 SHIFTER + PWM 13 - Vc c O K DIS FGND SHUT DO WN R PF C STOP Q VCC S OCP2 8 LINE OK OCP2 VREG BURST- M O DE CT RL 10 DI S 0.3 2mA Ilimre f + + LV G 0.8 V max. OCP 1.25V - - Low LINE OK - 1.75V 11 1 UV LO - GND LINE + 3R + SOFT-START R 15A 2.0 V 4 7 SS COMP August 2012 Doc ID 14821 Rev 6 1/41 This is information on a product in full production. www.st.com 41 Dead time adjustment & logicContents L6591 Contents 1 Description . 3 2 Pin settings 4 2.1 Connection . 4 2.2 Functions 4 3 Electrical data 7 3.1 Maximum ratings 7 3.2 Thermal data . 7 4 Electrical characteristics . 8 5 Typical characteristics 12 6 Application information . 21 6.1 High-voltage startup generator . 22 6.2 Operation at no load or very light load . 24 6.3 PWM control block 26 6.4 PWM comparator, PWM latch and hiccup mode OCP . 26 6.5 Latched shutdown 27 6.6 Oscillator and deadtime programming . 28 6.7 Adaptive UVLO . 30 6.8 Line sensing function 31 6.9 Soft-start and delayed latched shutdown upon overcurrent . 32 7 Summary of L6591 power management functions . 34 . 37 8 ECOPACK 9 Order codes . 39 10 Revision history . 40 2/41 Doc ID 14821 Rev 6