Product Summary
The UCC3580 family of PWM controllers is designed to implement a variety
of active clamp/reset and synchronous rectifier switching converter topologies. While containing all the necessary functions for fixed frequency, high
performance pulse width modulation, the additional feature of this design is
the inclusion of an auxiliary switch driver which complements the main
power switch, and with a programmable deadtime or delay between each
transition. The active clamp/reset technique allows operation of single
ended converters beyond 50% duty cycle while reducing voltage stresses
on the switches, and allows a greater flux swing for the power transformer.
This approach also allows a reduction in switching losses by recovering energy stored in parasitic elements such as leakage inductance and switch
capacitance.
The oscillator is programmed with two resistors and a capacitor to set
switching frequency and maximum duty cycle. A separate synchronized
ramp provides a voltage feedforward pulse width modulation and a programmed maximum volt-second limit. The generated clock from the oscillator contains both frequency and maximum duty cycle information.
Parametrics
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V IVDD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA LINE, RAMP . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to VDD + 1V ILINE, IRAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA DELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3V IDELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA IOUT1 (tpw < 1 s and Duty Cycle < 10%) . . . . . . . 0.6A to 1.2A IOUT2 (tpw < 1 s and Duty Cycle < 10%) . . . . . . . 0.4A to 0.4A ICLK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA to 100mA OSC1, OSC2, SS, SHTDWN, EAIN . . . . . 0.3V to REF + 0.3V IEAOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA to 5mA IREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2V to 0.2V Storage Temperature . . . . . . . . . . . . . . . . . . . 65°C to +150°C Junction Temperature. . . . . . . . . . . . . . . . . . . 55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C All voltages are with respect to ground unless otherwise stated. Currents are positive into, negative out of the specified terminal. Consult Packaging Section of Databook for thermal limitations and considerations of packages
Features
Provides Auxiliary Switch Activation
Complementary to Main Power
Switch Drive
Programmable deadtime (Turn-on
Delay) Between Activation of Each
Switch
Voltage Mode Control with
Feedforward Operation
Programmable Limits for Both
Transformer Volt- Second Product
and PWM Duty Cycle
High Current Gate Driver for Both
Main and Auxiliary Outputs
Multiple Protection Features with
Latched Shutdown and Soft Restart
Low Supply Current (100 A Startup,
1.5 mA Operation)
Diagrams
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Image | Part No | Mfg | Description | Pricing (USD) |
Quantity | |||||||||||||
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UCC3580D-4 |
Texas Instruments |
Voltage Mode PWM Controllers Single Ended Active Clamp/Reset PWM |
Data Sheet |
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UCC3580D-4G4 |
Texas Instruments |
Voltage Mode PWM Controllers Single Ended Active Clamp/Reset PWM |
Data Sheet |
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