|
ISL6726_14 Datasheet, PDF (1/20 Pages) Intersil Corporation – Active Clamp Forward PWM Controller | |||
|
Active Clamp Forward PWM Controller
ISL6726
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 âbrick-wallâ 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
+VIN
OUTM
LEVEL
SHIFT
-VIN
LEVEL
SHIFT
OUTAC
OUTM
OUTAC
-VIN
N- or P- CHANNEL ACTIVE CLAMP FORWARD
OUTAC
ASYMMETRIC HALF-BRIDGE
January 31, 2011
1
FN7654.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
|
▷ |