Datasheet

UCC28700, UCC28701
UCC28702, UCC28703
www.ti.com SLUSB41 – JULY 2012
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VDD = 25 V, R
CBC
= R
NTC
= open, -20°C ≤ T
A
≤ 125°C, T
J
= T
A
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Protection
V
OVP
Over-voltage threshold At VS input, T
J
= 25°C 4.52 4.6 4.68
V
V
OCP
Over-current threshold At CS input 1.4 1.5 1.6
I
VSL(run)
VS line-sense run current Current out of VS pin – increasing 190 220 260
µA
I
VSL(stop)
VS line-sense stop current Current out of VS pin – decreasing 70 80 95
K
VSL
VS line-sense ratio I
VSL(run)
/ I
VSL(stop)
2.5 2.8 3.05 A/A
Thermal shut-down
T
J(stop)
Internal junction temperature 165 °C
temperature
Cable Compensation (UCC28700 only)
Cable compensation
V
CBC(max)
Voltage at CBC at full load 2.8 3.0 3.4 V
maximum voltage
V
CBC
= open, change in VS regulating level at full
V
CVS(min)
Compensation at VS -45 -15 25
load
mV
Maximum compensation at V
CBC
= 0 V, change in VS regulating level at full
V
CVS(max)
275 320 365
VS load
Cable Compensation (UCC28701/2/3 only)
Compensation at VS
V
CVS
Change in VS regulating level at full load -45 -15 25
(UCC28701)
Compensation at VS
V
CVS
Change in VS regulating level at full load 100 mV
(UCC28702)
Compensation at VS
V
CVS
Change in VS regulating level at full load 200
(UCC28703)
NTC Input (UCC28701/2/3 only)
V
NTCTH
NTC shut-down threshold Fault UVLO cycle when below this threshold 0.95 V
I
NTC
NTC pull-up current Current out of pin 105 µA
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