STR-E1555 Datasheet | Sanken

PFC/DC-DC Systematic bo Power IC March, 2006 - General Description - Package---SLA21Pin STR-E1555 is a Hybrid IC power-factor-corrected switching mode power supply (SMPS). Start-up circuit and a controller of PFC and DC/DC parts are built in one chip. In addition, this chip and Power MOS FET for DC/DC part are incorporated into a SIP package thanks to High Voltage BCD Process technology. STR-E1555 includes the System of Prioritized PFC-Startup for prevention of Start-up Error. Our proprietary Multi Mode Control system simplifies the design of High Efficiency and Low EMI power supply system with a small number of discrete ponents. Additionally, since built-in Auto Standby Function with AC input pensation reduces power consumption at standby, STR-E1555 is optimum for downsizing and standardization of power supply system. STR-E1555 enables to configure the optimum system for diverse PFC outputs because the power MOSFET is provided externally. - Features - Integrated PFC Control Block 1. Critical Conduction Mode for High Efficiency and Low EMI 2.Built-in Multiplier with AC input pensation - High Efficiency and Low EMI DC/DC Control Block 1. Multi Mode Control (1) Quasi Resonant -------------------- Middle ~ Heavy Load (2) PWM（100k Hz）with Frequency Jitter -------------------- Light ~ Middle Load (3) Low Frequency Operation ------- No Load ~ Extremely Light Load - PFC <=> DC/DC Part Harmonized Operation System 1. PFC Priority Start-up System for Prevention of Start-up error 2. Auto Standby System with AC input pensation 3. PFC operation stops automatically with delay timer (at standby) - Protection Functions 1. Over Current Protection with AC input voltage pensation for PFC part (OCP) 2. High Speed Over Voltage Protection for PFC part (OVP) <No latch mode> 3. Over Current Protection for DC/DC part (OCP) 4. Over Load Protection for DC/DC part (OLP) 5. Input Power Limitation System at Intermittent Oscillation 6. Thermal Shut Down (TSD) 7....