Part Number: LM5026
Function: Active Clamp Current Mode PWM Controller
Package: WSON, TSSOP 16 Pin Type
Manufacturer: Texas Instruments
Pinouts:
Description
The LM5026 PWM controller contains all of the features necessary to implement power converters utilizing the active clamp / reset technique with current mode control. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B).
The device can be configured to control either a P-Channel or N-Channel clamp switch. The main gate driver features a compound configuration, consisting of both MOS and Bipolar devices, providing superior gate drive characteristics. The LM5026 can be configured to operate with bias voltages over a wide input range of 8V to 100V.
Additional features include programmable maximum duty cycle, line under-voltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1MHz capable oscillator with synchronization input / output capability, precision reference and thermal shutdown.
Features
• Current Mode Control
• Internal 100V Start-up Bias Regulator
• 3A Compound Main Gate Driver
• High Bandwidth Opto-coupler Interface
• Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
• Versatile Dual Mode Over-Current Protection with hiccup delay timer
• Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
• Programmable Maximum Duty Cycle Clamp
• Programmable Soft-start
• Leading Edge Blanking
• Resistor Programmed 1MHz Capable Oscillator
• Oscillator Sync I/O Capability
• Precision 5V Reference
Applications
1. Server Power Supplies
2. 48-V Telecom Power Supplies
3. High Efficiency DC–DC Power Supplies
Other data sheets are available within the file:
LM5026MT, LM5026MT/NOPB, LM5026MTX/NOPB, LM5026SD/NOPB
LM5026 Datasheet PDF Download
