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HV9606

Supertex Inc
Part Number HV9606
Manufacturer Supertex Inc
Description HV9606 Current-Mode PWM Controller with Supervisor
Published Mar 26, 2005
Detailed Description HV9606 Initial Release HV9606 Current-Mode PWM Controller with Supervisor Features Synchronous Forward, Forward, and Fl...
Datasheet PDF File HV9606 PDF File

HV9606
HV9606


Overview
HV9606 Initial Release HV9606 Current-Mode PWM Controller with Supervisor Features Synchronous Forward, Forward, and Flyback Controller Lowest External Parts Count, Smallest Magnetics Eliminates Bootstrap Transformer Winding Supervisor Circuit Reduces Output Capacitance* up to 40% Supervisor Circuit Functions as µP Supply Monitor and POR 15V to 250V Start-Up Regulator with START/STOP Control <1mA Operating, <6µA Standby Input Current VDD Powered Operation down to 2.
9V Charge Pump Gate Drive Supply Programmable Soft Start Under Voltage Lockout with Programmable Hysteresis <50% Duty Cycle Operation 15kHz to 400kHz Fixed Frequency PWM Operation Fault Tolerant Peer-to-Peer Synchronization Precision !1% Band Gap Voltage Reference Current Sense Leading Edge Blanking Small SSOP-20 Footprint *For short duration line loss, supervisor disables soft start if output within tolerance when VIN returns and thus reduces holdup requirements.
General Description The HV9606 PWM controller allows the design of high efficiency (>90%) power supplies for distributed board mounted power (BMP) applications.
Due to its high frequency capability it can provide high currents (20A @ 3.
3V) with small transformers and due to its low internal operating voltage and current is also able to achieve high efficiencies in low power applications.
The HV9606 utilizes fixed frequency current mode control with duty cycle internally limited to <50%.
It supports both isolated and nonisolated topologies and provides all the necessary functions to implement a flyback, forward or synchronous forward converter with a minimum of external parts.
Due to its low VDD operation the bootstrap magnetic winding is eliminated in non-isolated topologies.
An on chip charge pump generates the gate drive voltage for driving an external N-channel MOSFET and eliminates the need for clamping by offering 250V immunity to high voltage transients common in telecom and network systems.
It conforms to the requirements of IEEE 802.
3 ...


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