SLUAAK3 January   2024 UCC256402

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2UCC25640X HS Pin Has Wide dv/dt Sensing Range
  6. 3UCC256402/4 Eliminating the Need for the Auxpower
  7. 4UCC25640X has Higher Vcc Startup Voltage to Support Lower Vcc Capacitance
  8. 5UCC25640X has Programmable Burst Mode Threshold
  9. 6UCC256402A Supports Input OVP to Protect PSU if Grid Voltage is Unstable
  10. 7UCC25640X has Diversity Version for Each Application
  11. 8Summary
  12. 9References

7 UCC25640X has Diversity Version for Each Application

UCC25640X has diversity version to meet different requirement at each application.

See the detailed difference of each device in the following.

  • UCC256402: without the Xcap discharge function can support the DC input (lighting and industrial PSU)
  • UCC256402A: based on the UCC256402 and add input OVP function.
  • UCC256403: without the HV start up function to support the PSU with Aux power (industrial PSU and high-power TV)
  • UCC256404: normal AC input application
  • UCC256403/4A: based on the UCC256403/4 and output OVP is the latch mode
Table 7-1 UCC25640X Function Comparison Table
Device Integrated high voltage startup Integrated X-cap discharge Require external bias supply Burst soft on/off BLK OVP BW OVP mode
UCC256402 Yes No No No No Restart
UCC256402A Yes No No No Yes Restart
UCC256403 No No Yes Yes No Restart
UCC256403A No No Yes No No Latch
UCC256404 Yes Yes No Yes No Restart
UCC256404A Yes Yes No No No Latch
UCC256404B Yes Yes No Yes No Restart
Table 7-2 UCC25640X Parameter Difference Table
Device burst package size BLK start BLK stop BLK OVP Vcc startup voltage FB pin current source Highest AC zero crossing detection test current HB-HS voltage rating
UCC256402 16 3V 2.2V NA 26V 82uA NA 17V
UCC256402A 16 3V 2.2V 4V 26V 82uA NA 17V
UCC256403 40 3V 2.2V NA 10.9V 164uA NA 17V
UCC256403A 16 3V 2.2V NA 10.9V 164uA NA 17V
UCC256404 40 1V 0.9V NA 26V 82uA 1.7mA 17V
UCC256404A 16 1V 0.9V NA 26V 82uA 1.7mA 17V
UCC256404B 40 1V 0.9V NA 26V 82uA 1.3mA 25V