LCS703LG Power Integrations

HiperLCS Family Integrated LLC Controller, High-Voltage Power MOSFETs and Drivers B+ Product Highlights D VCCH Features LLC half-bridge power stage incorporating controller, high and CONTROL low-side gate drives, and high-voltage power MOSFETs Standby VCC Supply +V HB Eliminates up to 30 external components High maximum operating frequency of 1 MHz HV DC OV/UV Input Nominal steady-state operation up to 500 kHz VREF Dramatically reduces magnetics size and allows use of SMD R RTN FMAX ceramic output capacitors DT/BF IS Precise duty symmetry balances output rectifier current, improving HiperLCS R efficiency BURST 50% 0.3% typical at 300 kHz FB G S1/S2 B- Comprehensive fault handling and current limiting PI-6159-060211 Programmable brown-in/out thresholds and hysteresis LLC Feedback Circuit Undervoltage (UV) and overvoltage (OV) protection Programmable over-current protection (OCP) Figure 1. Typical Application Circuit LCD TV and PC Main Power Supply. Short-circuit protection (SCP) Over-temperature protection (OTP) Programmable dead-time for optimized design Output Power Table Programmable burst mode maintains regulation at no-load and 1 improves light load efcfi iency Product Maximum Practical Power Programmable soft-start time and delay before soft-start LCS700HG/LG 110 W Accurate programmable minimum and maximum frequency limits Single package designed for high-power and high-frequency LCS701HG/LG 170 W Reduces assembly cost and reduces PCB layout loop areas Simple single clip attachment to heat sink LCS702HG/LG 220 W Staggered pin arrangement for simple PC board routing and high-voltage creepage requirements LCS703HG/LG 275 W Paired with HiperPFS PFC product gives complete, high efficiency, low part count PSU solutions LCS705HG/LG 350 W Applications LCS708HG/LG 440 W High-efficiency power supplies (80 PLUS Silver, Gold and Platinum) Table 1. Output Power Table. LCD TV power supplies Notes: LED street and area lighting 1. Maximum practical power is the power the part can deliver when properly Printer power supplies mounted to a heat sink and a maximum heat sink temperature of 90 C. Audio amplifier Description The HiperLCS is an integrated LLC power stage incorporating a multi-function controller, high-side and low-side gate drivers, plus two power MOSFETs in a half-bridge congfi uration. Figure 1 shows a simpliefi d schematic of a HiperLCS based power stage where the LLC resonant inductor is integrated into the transformer. The variable frequency controller provides high-efficiency by switching the power MOSFETs at zero voltage (ZVS), eliminating switching losses. www.power.com May 2017 This Product is Covered by Patents and/or Pending Patent Applications.LCS700-708 VCC DRAIN (D) VREF 3.4 V REGULATOR UVLO VCCH UVLO + LLC ON SOFT-START DELAY 131,072 LLC VSDH/ CLOCK CYCLES OV/UV VSDL DEBOUNCE + OVER- 3 LLC CLOCK TEMPERATURE CYCLES VOVH/ PROTECTION VOVL + IS HB VISF LEVEL SHIFT 7 CONSECUTIVE + LLC CLK LLC CLOCK CYCLES VISS VREF FEEDBACK (FB) OUTPUT LLC DEAD-TIME DT/BF CONTROL CLOCK GENERATOR LOGIC DEBOUNCE + 3 LLC CLOCK CYCLES Bursting Thresholds DT/BF Control RESISTOR SENSOR PI-5755-060111 SOURCE (S1/S2) GROUND (G) Figure 2. Block Diagram. 2 Rev. G 05/17 www.power.com