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 Compensation 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.

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 Compensation

• Programmable Switching Frequency

• Internally Trimmed Reference with UVLO (Under Voltage Lockout)

• Cycle-by-Cycle Current Limiting

Applications

• Switching AC-DC Adaptors

• DC-DC Switching Buck/Boost Converters

• LED Backlights for LCD/LED TVs

Package 8 SOP-A