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 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.

Also Recommended LM5025▲ Active Clamp Voltage Mode PWM Controller LM5025A▲ Active Clamp Voltage Mode PWM Controller LM5034▲ Dual Interleaved Active Clamp Current Mode Controller LM5110 Dual 5A Compound Gate Driver With Negative Drive Capability LM5112 High Current 7A Single Low-Side Mosfet Driver LM3411 Feedback Control / Optocoupler Driver For Isolated Supplies MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram *click for larger image

Datasheet

Title		Size	Date	Other Language
	LM5026 Active Clamp Current Mode PWM Controller	657 Kbytes	15-Jan-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1387: Application Note 1387 LM5026 Evaluation Board	721 Kbytes	7-Sep-05	中文
	AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08
	AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07

More Application Notes

Title		Size	Date	Other Language
	AN-1976: Application Note 1976 LM5027 Evaluation Board	588 Kbytes	19-Aug-09
	AN-1696: Application Note 1696 Designing a Boost LED Driver Using the LM5022	286 Kbytes	22-Feb-08	中文
	AN-1314: Application Note 1314 LM5020 Evaluation Board	612 Kbytes	10-Feb-05
	AN-1605: Application Note 1605 LM5022 Boost LED Driver Evaluation Board	769 Kbytes	2-Oct-07
	AN-1557: Application Note 1557 LM5022 Evaluation Board	513 Kbytes	22-May-08	中文

Design Tools

Title	Size	Date
Article - Current Mirror Improves PWM Regulator's Performance

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5026MT	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5026MTX	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5026SD	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5026SDX	ABCD150XV1	0	3868	0	0	2595000	2	736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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