HT7A4016 -- Low Power, Wide Temperature Range General Purpose Current Mode PWM Controller

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.

Features

  • Input voltage range: 4.75V to 24V
  • High Performance, Low Cost Current Mode PWM Controller especially designed for Energy Star 2.0
  • Very Low Startup Current (<20uA) 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

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