Download The Rating of Power Transistor

The Rating of Power Transistor
VCBO
VCEO
VCES
VCER
• Typically VCBO ~ VCES > VCER > VCEO (VCER resister value less than 1K),
After test, VCES is close to VCBO.
• If VCER resister value less than 1K, VCES ~ VCER VCER is close to VCES,
After test, VCER is close to VCES.
• The voltage rating is tested according to the leakage current
– No IC current in this moment
– VCBO can only be used in normal mode condition
The Rating of Power Transistor
• If customer is doubt with the rating voltage of power transistor,
customer can simulation test with VCBO ,VCES , VCER , VCEO
• Inside chip VCER driver sink resistor is less than 10ohm, the VCER is
close to VCBO.
• More and more big semi-conductor company use Vces instead of
Vcbo to avoid mis-understanding. For example, above is the ST
datasheet, it change the spec Vcbo to Vces.