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Details for UCC28950PW by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
PWM CNTRL PHASE-SHIFT 24TSSOP
UCC28950PW image

UCC28950PW by Texas Instruments

PWM CNTRL PHASE-SHIFT 24TSSOP
Features
(u00b13%) Cycle-by-Cycle Current Limit Protection With Hiccup Mode Support
150-u00b5A Start-Up Current
Average or Peak Current Mode Control With Programmable Slope Compensation and Voltage Mode Control
Closed Loop Soft Start and Enable Function
Direct Synchronous Rectifier (SR) Control
Enhanced Wide Range Resonant Zero Voltage Switching (ZVS) Capability
Light-Load Efficiency Management Including u2013 Burst Mode Operation u2013 Discontinuous Conduction Mode (DCM), Dynamic SR On and Off Control with Programmable Threshold u2013 Programmable Adaptive Delay
Naturally Handles Pre-Biased Start Up With DCM Mode
Programmable Switching Frequency up to 1 MHz with Bi-Directional Synchronization
VDD Undervoltage Lockout
Wide Temperature Range u201340u00b0C to +125u00b0C
Part Information
UCC28950PW image
RoHS Compliant
Description
The UCC28950 enhanced phase-shifted controller builds upon Texas Instrument’s industry standard UCx895 phase-shifted controller family with enhancements that offer best in class efficiency in today’s high performance power systems. The UCC28950 implements advanced control of the fullbridge along with active control of the synchronous rectifier output stage. The primary-side signals allow programmable delays to ensure ZVS operation over wide-load current and input voltage range, while the load current naturally tunes the secondary-side synchronous rectifiers switching delays, maximizing overall system efficiency. The UCC28950 also offers multiple light-load management features including burst mode and dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads. In addition, the UCC28950 includes support for current or voltage mode control. Programmable switching frequency up to 1 MHz and a wide set of protection features including cycle-by-cycle current limit, UVLO and thermal shutdown. A 90-degree phase-shifted interleaved synchronized operation can be easily arranged between two converters. The UCC28950 is available in TSSOP-24 package.
Specifications
Input Voltage:
3.6V
Output Voltage:
5V
Output Current:
20mA
Supply Voltage Min:
8V
Supply Voltage Max:
17V
Controller IC Case Style:
TSSOP
No. of Pins:
24Pins
Frequency:
1MHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (27-Jun-2018)
Base Number:
28950
Operating Temperature Range:
-40°C to +125°C
Power Dissipation Pd:
615mW
Supply Voltage Range:
8V to 17V
Alternate Descriptions
Soft Sw PWM Cntrlr 1-OUT Phase Shifted Full Bridge Controller 12V 1MHz 24-Pin TSSOP T/R Avnet America
Soft Sw PWM Cntrlr 1-OUT Phase Shifted Full Bridge Controller 12V 1MHz 24-Pin TSSOP T/R Avnet Europe