HT7A4016 Datasheet | Holtek Semiconductor

.DataSheet.co.kr HT7A4016 Low Power, Wide Temperature Range General Purpose Current Mode PWM Controller Feature - High Performance, Low Cost Current Mode PWM Controller especially designed for Energy Star 2.0 - Very Low Startup Current (<20μA) and Operating Current - High-Voltage CMOS Process with Excellent ESD protection (>3KV) - ±5% Trimmed Oscillator for Precise Frequency Control - LEB (Leading-Edge Blanking) on CS Pin - Internal Slope pensation - Programmable Switching Frequency - Internally Trimmed Reference with UVLO (Under Voltage Lockout) - Cycle-by-Cycle Current Limiting General Description The HT7A4016 is a controller IC that includes the necessary Features to implement off-line or DC-DC current mode control schemes with a minimal external parts count. Internal circuits include a specially designed Mixed-Mode/Analog Interface for multifunction and multi-topology control schemes (DC-DC Buck/Boost, Off-line AC-DC), a trimmed oscillator for precise duty-cycle control under voltage lockout with a start-up current of less than 0.5mA, a wide temperature range, precise voltage reference, internal Slope pensation and Leading-Edge Blanking. The HT7A4016 Features basic system protection functions such as Cycle-by-Cycle Current Limiting and Under Voltage Lock-Out (UVLO). A Multi-Function Pin can be used as a dimming function for LED driving, and as a primary feedback control for Primary-Side Feedback AC-DC applications. Applications - Switching AC-DC Adaptors - DC-DC Switching Buck/Boost Converters - LED Backlights for LCD/LED TVs Application Circuits VIN=24V VCC Vref RT 0.1uF 2.2K GND CS MF GD P/FB 33pF 470uF/50V 10 1N4148 20 10K 470K 1nF 2K 46uH HFB20HJ20C 470uF /63V 40K Vo=55V/75W 0.1uF/100V IRF540 820 0.22 0.22 220pF Rev....