Datasheet

UCC28050, UCC28051
UCC38050, UCC38051
SLUS515F−SEPTEMBER 2002 − REVISED MARCH 2009
5
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ELECTRICAL CHARACTERISTICS
T
A
= 0_C to 70_C for the UCC3805x, –40_C to 105_C for the UCC2805x, T
A
= T
J
, V
CC
= 12 V.
zero power
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Zero power comparator threshold
(1)
Measured on V
COMP
2.1 2.3 2.5 V
zero current detect
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input threshold (rising edge)
(1)
1.5 1.7 2.0 V
Hysteresis
(1)
250 350 450 mV
Input high clamp I = 3 mA 5 6 V
Input low clamp I = −3 mA 0.30 0.65 0.90 V
Restart time delay 200 400 μs
current sense comparator
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input bias current CS = 0 V 0.1 1.0 μA
Input offset voltage
(1)
−10 10 mV
Delay to output CS to DRV 300 450 ns
Maximum current sense threshold voltage 1.55 1.70 1.80 V
PFC gate driver
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
GT1 pull up resistance I
OUT
= –125 mA 5 12 Ω
GT1 pull down resistance I
OUT
= 125 mA 2 10 Ω
GT1 output rise time C
LOAD
= 1 nF, R
LOAD
= 10 Ω 25 75 ns
GT1 output fall time C
LOAD
= 1 nF, R
LOAD
= 10 Ω 10 50 ns
(1) Ensured by design. Not production tested.