SLVT229 December   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 High Side Gate Drive Circuit
      2. 2.2.2 PWM Generation Circuit
    3. 2.3 Highlighted Products
      1. 2.3.1 UCC21330-Q1 Overview
      2. 2.3.2 UCC27211A-Q1 Overview
      3. 2.3.3 TPS1212-Q1 Overview
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Efficiency Data
      2. 3.3.2 Efficiency Graphs
      3. 3.3.3 Output Voltage Ripple
      4. 3.3.4 Thermal Images
      5. 3.3.5 Switch Voltage Stress of High Side Switches
      6. 3.3.6 Load Transients
      7. 3.3.7 Reverse Step-up Operation of SCC
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 PCB Layout Recommendations
    2. 4.2 Documentation Support
    3.     Trademarks

1.1 Key System Specifications

Table 1-1 Key System Specifications
Parameters Test Condition Min Nom Max Unit
INPUT CONDITIONS
Input voltage / 36 48 52 (absmax70) Volt
Input current / / 20 25 Ampere
OUTPUT CONDITIONS
Output voltage 3:1 conversion ratio 12 16 17.33 Volt
4:1 conversion ratio 9 12 13 Volt
Output current 3:1 conversion ratio / / 65 Ampere
4:1 conversion ratio / / 80 Ampere
Output voltage ripple 3:1 conversion ratio / / 270 millivolt
4:1 conversion ratio / / 250 millivolt
Output power / / 960 2000 (transient, 2s) Watt
SYSTEM CHARACTERISTICS

Efficiency%

(power stage only; bias is not included)

3:1 conversion ratio;

Vin = 48V, Vout = 15.81V, Iout = 25A (max efficiency)

 98.69 %

3:1 conversion ratio;

Vin = 48V, Vout = 15.77V, Iout = 30A (half load)

 98.62 %

3:1 conversion ratio;

Vin = 48V, Vout = 15.51V, Iout = 60A (full load)

 97.56 %

4:1 conversion ratio;

Vin = 48V, Vout = 11.84V, Iout = 30A (max efficiency)

 98.54 %

4:1 conversion ratio;

Vin = 48V, Vout = 11.78V, Iout = 40A (half load)

 98.33 %

4:1 conversion ratio;

Vin = 48V, Vout = 11.52V, Iout = 80A (full load)

 96.68 %
Operating ambient -40 25 105 Deg C
Switching frequency / 140 / 320 kHz
Load transient

3:1 conversion ratio;

0A to 60A; dI/dt = 0.1A/us

 -3.13 1.56 %

4:1 conversion ratio

0A to 80A; dI/dt = 0.1A/us

 -2.78 2.08 %