The LM5026 PWM controller contains all of the features necessary to implement power converters utilizing the active clamp and 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 and 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 8 V to 100 V. Additional features include programmable maximum duty cycle, line undervoltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1-MHz capable oscillator with synchronization input and output capability, precision reference, and thermal shutdown.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM5026 Active Clamp Current Mode PWM Controller datasheet (Rev. E) | PDF | HTML | Nov 30, 2015 |
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| Application note | Operation and Benefits of Active-Clamp Forward Power Converters | Mar 22, 2007 |
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LM5026 Active Clamp Current Mode PWM Controller
PMP11478 is an isolated active clamp forward converter accepts a voltage range of 24-36V and delivers a 12V output at 2.5A. This design uses the LM5026 active clamp current-mode controller. Output voltage regulation is maintained using an LMV431 shunt regulator and opto-coupler feedback. Schottky (...)
This forward-converter reference design is designed for an isolated 60-W, 12-V intermediate bus voltage rail. It operates in a wide-input range of 9 V to 60 V. The design features LM5026, a 100-V active clamp current mode PWM controller. A self-driven secondary rectifier with UCC27511 4-A and 8-A (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (NHQ) | 16 | Ultra Librarian |
| TSSOP (PW) | 16 | Ultra Librarian |
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