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UCC2540

Features: · On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck eration· Dual ±3-A TrueDrive™ Outputs· 1-MHz High Frequency Operation with 70-ns elay from SYNCIN to G1 Output· Leading Edge Modulation· Overcurrent Protection using a Parallel verage Current Mode Control L...

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SeekIC No. : 004535796 Detail

UCC2540: Features: · On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck eration· Dual ±3-A TrueDrive™ Outputs· 1-MHz High Frequency Operation with 70-ns elay from SYNCIN to G1 Ou...

UCC2540 Data Sheet

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Part Number:
UCC2540
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck eration
· Dual ±3-A TrueDrive™ Outputs
· 1-MHz High Frequency Operation with 70-ns elay from SYNCIN to G1 Output
· Leading Edge Modulation
· Overcurrent Protection using a Parallel verage Current Mode Control Loop
· 3 Modes to Support 2.7-V to 35-V Bias peration
· Reverse Current Protection for Output Stage
· User Programmable Shutdown
· ±1.0% Initial Tolerance Bandgap Reference
· High Bandwidth Error Amplifiers
· Thermally Enhanced HTSSOP 20-Pin PowerPAD™ Package


Application

· Secondary-Side Post Regulation (SSPR) for Multiple Output Power Supplies
· Cascaded Buck Converters
· Post Processing Converters for Bus Converter and DC Transformer Architectures



Pinout

Connection Diagram


Specifications

   
UCC2540
UNIT
Supply voltage range, VDD  
36
V
Supply current, IVDD VDD
50
mA
Analog input voltages CEA−, COMP, G2C, RAMP, SS, TR, VEA−
−0.3 to 3.6
V
VDRV
−0.3 to 9
G1, BST
SW−0.3 to SW+9
SW, SWS
−1 to 36
G2, G2S
−1 to 9
SYNCIN
−0.3 to 8.0
ink current (peak), IOUT_SINK G1, G2
3.5
A
Source current (peak), IOUT_SOURCE G1, G2
-3.5
Operating junction temperature range, TJ
−55 to 150
Storage temperature, Tstg
−65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
300

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, nd functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" s not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND. Currents are positive into, and negative out of the specified terminal.



Description

The UCC2540 is a secondary-side synchronous uck PWM controller for high current and low utput voltage applications. It can be used either s the local secondary-side controller for isolated c-to-dc converters using two-stage cascaded
topologies or as a secondary-side post regulator  (SSPR) for multiple output power supplies.

he UCC2540 runs with the synchronization ignal from either the primary side or the high duty ycle quasi-dc output of bus converters or dc ransformers. For higher efficiency, it also ncorporates the Predictive Gate Drive™echnology that virtually eliminates body diode onduction losses in synchronous rectifiers.




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