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ISL6726 Datasheet(PDF) 1 Page - Renesas Technology Corp

Part No. ISL6726
Description  Active Clamp Forward PWM Controller
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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ISL6726 Datasheet(HTML) 1 Page - Renesas Technology Corp

 
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FN7654 Rev 0.00
Page 1 of 21
January 31, 2011
FN7654
Rev 0.00
January 31, 2011
ISL6726
Active Clamp Forward PWM Controller
DATASHEET
The ISL6726 is a highly featured single-ended PWM controller
intended for applications using the active clamp forward
converter topology in either n- or p-channel active clamp
configurations, the asymmetric half-bridge topology, and the
standard forward topologies with synchronous rectification. It
is a current-mode PWM controller with many features
designed to simplify its use. Among its many features are a
precision oscillator which allows accurate control of the
deadtime and maximum duty cycle, bi-directional
synchronization with 180° phase shift for interleaving
applications, adjustable soft-start and soft-stop, a low power
disable mode, and average current limit for “brick-wall”
overcurrent protection.
This advanced BiCMOS design features low start-up and
operating currents, adjustable switching frequency to greater
than 1MHz, high current FET drivers, and very low propagation
delays for a fast response to overcurrent faults.
Applications
• Telecom and Datacom Power Supplies
• AC/DC Power Supplies
• Battery Chargers
Features
• Precision Maximum Duty Cycle and Deadtime Control
• 125µA Typical Start-up Current
• Adjustable Peak and Average Current Limit Protection
• Programmable Oscillator Frequency
• Bi-Directional Synchronization with 180° Phase Shift for
Interleaved Converter Applications
• Adjustable Soft-Start and Selectable Soft-Stop
• Selectable Minimum Duty Cycle Clamp for Synchronous
Rectifier Applications
• Programmable Slope Compensation
• Supports N- and P-Channel Active Clamp FETs
• Programmable Switch Timing Between Main and Active
Clamp Outputs
• Programmable Undervoltage Lock-Out (UV)
• Input Voltage Dependent Duty Cycle Clamp
• ENABLE Input with Low Power Disable
• Internal Over-Temperature Protection
• Pb-Free (RoHS Compliant)
+VIN
OUTAC
OUTM
LEVEL
SHIFT
-VIN
N- or P- CHANNEL ACTIVE CLAMP FORWARD
ASYMMETRIC HALF-BRIDGE
+VIN
-VIN
OUTAC
OUTM
OUTAC
LEVEL
SHIFT


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