Datasheet

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SLUS274A – JANUARY 1999 – REVISED APRIL 2003
3
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ELECTRICAL CHARACTERISTICS
T
A
= –40°C to 85°C for UCC2913, T
A
= 0°C to 70°C for UCC3913, T
J
= T
A,
I
VDD
= 2 mA, CT = 4.7 pF, T
A
= T
J
(unless otherwise noted)
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
Minimum input current, VDD 1 2 mA
Regulator voltage 2 mA≤ I
SOURCE
≤ 10 mA 8.5 9.5 10.5
V
Undervoltage lockout off-voltage 6 7 8
V
FAULT TIMING
Overcurrent threshold voltage
T
J
= 25 °C 47.5 50.0 53.0
mV
Overcurrent threshold voltage
Over temperature 46.0 50.0 53.5
mV
Overcurrent input bias 50 500 nA
V
CT
= 1.0 V, I
PL
= 0 A –22 –36 –50 µA
Timing capacitance charge current
Overload condition,
V
SENSE
– V
IMAX
= 300 mV
–0.7 –1.2 –1.7 mA
Timing capacitance discharge current V
CT
= 1.0 V, I
PL
= 0 A 0.6 1.0 1.5 µA
Timing capacitance fault threshold voltage 2.2 2.4 2.6 V
Timing capacitance reset threshold voltage 0.32 0.50 0.62 V
Output duty cycle Fault condition, I
PL
= 0 A 1.7% 2.7% 3.7%
OUTPUT
High le el o tp t oltage
I
OUT
= 0 A 8.5 10
High-level output voltage
I
OUT
= –1 A 6 8
Low level output voltage
I
OUT
= 0 A,
V
SENSE
– V
IMAX
= 100mV
0.01
V
Low-level output voltage
I
OUT
= 2 A,
V
SENSE
– V
IMAX
= 100mV
0.2 0.6
LINEAR AMPLIFIER
Sense control voltage
V
IMAX
= 100 mV 85 100 115
mV
Sense control voltage
V
IMAX
= 400 mV 370 400 430
mV
Input bias 50 500 nA
SHUTDOWN/FAULT
Shutdown threshold voltage 1.4 1.7 2.0 V
Input current V
SD/FLT
= 5 V 15 25 45 µA
High-level output voltage 6.0 7.5 9.0
V
Low-level output voltage 0.01
V
Delay-to-output time 150 300 ns
POWER LIMITING
PL regulator voltage I
PL
= 64 µA 4.35 4.85 5.35 V
Duty cycle control
I
PL
= 64 µA 0.6% 1.2% 1.7%
Duty cycle control
I
PL
= 1 mA 0.045% 0.1% 0.17%
OVERLOAD
Delay-to-output time 300 500 ns
Output sink current V
SENSE
– V
IMAX
= 300mV 40 100 mA
Overload threshold voltage Relataive to I
IMAX
140 200 260 mV