SLUUCE8A February   2021  – October 2021 UCC25800-Q1

 

  1.   Trademarks
  2. 1 Description
  3. 2 Electrical Performance Specifications
  4. 3 Schematic Diagram
  5. 4 Description - How to Use
    1. 4.1 Typical Applications
    2. 4.2 Using the EVM with on-board Pre-regulator on Board
    3. 4.3 Using the EVM with an External DC Voltage Source
  6. 5 Test Setup
    1. 5.1 Test Setup Requirements
    2. 5.2 Test Setup Diagram
    3. 5.3 Test Points and Input / Output Terminals
  7. 6 Performance Data and Typical Characteristic Curves
    1. 6.1  Efficiency Result of the LLC Board with External DC Input Voltage
    2. 6.2  Efficiency Result of the LLC Board with Pre-regulator on Board
    3. 6.3  Efficiency Typical Results
    4. 6.4  Output Characteristics
    5. 6.5  Output Voltage Turn-on at Start Up
    6. 6.6  Output Ripple Voltage
    7. 6.7  Frequency Synchronized to External Signal
    8. 6.8  DIS-pin Enable and Dis-Enable
    9. 6.9  Load Transient Response
    10. 6.10 Switch-node Voltage and Current
    11. 6.11 Over-Current Limit and FLT-pin
    12. 6.12 CISPR-25 Class-5 Conducted EMI Test Result - Pass
    13. 6.13 Thermal Images at Full Load
  8. 7 Transformer Details
  9. 8 EVM Assembly and Layout
  10. 9 List of Materials
  11. 10Revision History

2 Electrical Performance Specifications

Table 2-1 UCC25800EVM-037 Electrical Performance Specifications(1)
PARAMETERTEST CONDITIONSMINNOMMAXUNIT
INPUT CHARACTERISTICS
VINInput voltage, DC

6

12

26

V

IIN

Input current at full loadVIN = 6 V

535

mA

VIN = 12 V

285

VIN = 26 V

140

OUTPUT CHARACTERISTICS
VOUT1Set-point, DCVIN = 6 to 26 V

17.93

18.10

18.27

V
IOUT1

Output current range

VIN = 6 to 26 V

0

85

mA

VOUT1

Load regulation

IOUT1 = IOUT2

No load to full load

-1.0

1.0

%

VOUT1

Pk-to-pk ripple

IOUT1 = IOUT2 at full load

50

mV

VOUT2Set-point, DCVIN = 6 to 26 V

-5.02

-4.98

-4.94

V

IOUT2Output current rangeVIN = 6 to 26 V

-85

0

mA

VOUT2Load regulationIOUT1 = IOUT2No load to full load

-1.0

1.0

%

VOUT2Pk-to-pk rippleIOUT1 = IOUT2at full load

35

mV

SYSTEMS CHARACTERISTICS

η

Efficiency, with pre-regulator

IOUT1 = IOUT2

VIN = 12 V, full load

59.3

%

ηEfficiency, without pre-regulatorIOUT1 = IOUT2

VIN = 15.6 V, full load

82.8

%

ηEfficiency, w/o pre-regulator and w/o output LDOIOUT1 = IOUT2

VIN = 15.6 V, full load

88.1

%

fSW

LLC Switching frequency

Normal operation

500

kHz

OCL

Output over-current limit

VIN = 6 to 26 V

100

mA

THOT

Max temperature on board

Ambient temperature TAMB = 25 °C

< 55

°C
VPOUT

Pre-regulator output voltage

VIN = 6 to 26 V

15.6

V

(1) The performance listed in this table is achieved based on the test results from a single board.