RS2535 700V High Voltage Green Mode PWM Power Switch with Brownout DESCRIPTION RS2535 is a highly integrated current mode PWM power switch. It built in patent High voltage startup, optimized for high performance, exhibit extra low standby power consumption (<30mW) and costs effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed. At no load or light load condition, it operates in burst mode to minimize switching loss. Less than 30mW standby power consumption and very high conversion efficiency is thus achieved. Patent high voltage startup is implemented in RS2535, which features with short startup time and extra low standby current. RS2535 offers rich protections with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD under voltage lockout (UVLO), and over temperature protection (OTP), VDD over voltage protection (OVP). It also provides the protection with latched shut down including VDD over voltage protection. Excellent EMI performance is achieved with RS2535 proprietary frequency burst technique. The frequency at below 22kHz is minimized to avoid audible noise during operation. FEATURES Built-in 700V High Voltage Startup Patent High voltage startup technique Extra Low Standby (<30mW) Integrated with HV MOSFET Power on Soft Startup Frequency spreading to Minimize EMI Audio Noise Free Operation Fixed 65kHz Switching Frequency Brownout function Comprehensive Protection VDD Under Voltage Lockout with Hysteresis (UVLO) Cycle-by-cycle Over Current Protection (OCP) Overload Protection (OLP) with Auto-recovery Over Temperature Protection (OTP) with Auto-recovery VDD Over Voltage Protection (OVP) with Auto-recovery APPLICATIONS Offline AC/DC Fly-back Converter for AC/DC Adapter PDA Power Supplies Digital Cameras and Camcorder Adapter VCR, SVR, STB, DVD&DVCD Player SMPS Set-Top Box Power Auxiliary Power Supply for PC and Server Open-frame SMPS Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No.233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan RS2535 BLOCK DIAGRAM BO Drain 4 7/8 VDD VTH_BO HV 6 Logic Control Latch Internal supply R Soft Driver CS Float Q Soft-Start S LVDD Green model OSC OCP UVLO Slope compensation POR VDD 5 LEB 1 CS 2 FB Vth CPL OVP 5V VDD clamper Burst model PWM Compartor Debounce GND OLP 3 Simplified Internal Circuit Architecture APPLICATION CIRCUITS V1.0 2 December 2013 RS2535 ORDERING INFORMATION Device RS2535 Y Z Device Code Y is package & pin assignments designator : D : DIP-8 Z is Lead Free designator : P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package PIN ASSIGNMENTS CS 1 8 Drain FB 2 7 Drain GND 3 6 HV BO 4 5 VDD DIP-8 PIN DESCRIPTION Pin Name Description Pin No. CS Current sense input. Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at CS pin. Ground Connected resistors for brownout protection Power Supply Connected to the line input or bulk capacitor via resistors for startup. HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of the transformer. 1 FB GND BO VDD HV Drain V1.0 3 2 3 4 5 6 7,8 December 2013 RS2535 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.0 10 December 2013