Datasheet
UCC2817-EP
UCC2818-EP
SLUS716 – DECEMBER 2008 ...........................................................................................................................................................................................
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ELECTRICAL CHARACTERISTICS (continued)
T
A
= – 55 ° C to 125 ° C, T
A
= T
J
, V
CC
= 12 V, R
T
= 22 k Ω , C
T
= 270 pF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Ramp amplitude voltage (peak
3.5 4 4.5 V
to peak)
Peak Current Limit
PKLMT reference voltage – 15 15 mV
PKLMT propagation delay 150 350 500 ns
Multiplier
High line, low power output I
AC
= 500 µ A, V
FF
= 4.7 V,
11 – 6 – 33
current VAOUT = 1.25 V
High-line, high-power output I
AC
= 500 µ A, V
FF
= 4.7 V,
– 53 – 90 – 112
current VAOUT = 5 V
Low-line, low-power output I
AC
= 150 µ A, V
FF
= 1.4 V,
I
MOUT
– 8 – 19 – 50 µ A
current VAOUT = 1.25 V
Low-line, high-power output I
AC
= 150 µ A, V
FF
= 1.4 V,
– 268 – 300 – 350
current VAOUT = 5 V
I
AC
= 150 µ A, V
FF
= 1.3 V,
IAC limited output current – 250 – 300 – 400
VAOUT = 5 V
I
AC
= 200 µ A, V
FF
= 3 V,
Gain constant (K) 0.5 1 1.6 1/V
VAOUT = 2.5 V
I
AC
= 150 µ A, V
FF
= 1.4 V,
0 – 2
VAOUT = 0.25 V
I
AC
= 500 µ A, V
FF
= 4.7 V,
I
MOUT
Zero current 0 – 2 µ A
VAOUT = 0.25 V
I
AC
= 500 µ A, V
FF
= 4.7 V,
0 – 3.5
VAOUT = 0.5 V
I
AC
= 150 µ A, V
FF
= 1.4 V,
Power limit (I
MOUT
× V
FF
) – 375 – 420 – 490 µ W
VAOUT = 5 V
Feed Forward
VFF output current I
AC
= 300 µ A – 140 – 150 – 160 µ A
Soft Start
Softstart charge current – 6 – 10 – 16 µ A
Gate Driver
Pullup resistance I
O
= – 100 mA to – 200 mA 5 12 Ω
Pulldown resistance I
O
= 100 mA 2 10 Ω
C
L
= 1 nF, R
L
= 10 Ω ,
Output rise time 25 50 ns
V
DRVOUT
= 0.7 V to 9 V
C
L
= 1 nF, R
L
= 10 Ω ,
Output fall time 10 50 ns
V
DRVOUT
= 9 V to 0.7 V
Maximum duty cycle 93% 95% 99%
Minimum controlled duty cycle At 100 kHz 2%
Zero Power
Zero-power comparator Measured on VAOUT 0.2 0.33 0.5 V
threshold
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