Datasheet
ELECTRICAL CHARACTERISTICS
UCC2817-EP
UCC2818-EP
www.ti.com
........................................................................................................................................................................................... SLUS716 – DECEMBER 2008
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
Supply Current
Supply current, off V
CC
= (V
CC
turn-on threshold – 150 300 µ A
0.3 V)
Supply current, on V
CC
= 12 V, No load on 2 4 6 mA
DRVOUT
UVLO
VCC turn-on threshold UCC2817 15.4 16 16.6 V
VCC turn-off threshold UCC2817 9.4 9.7 V
UVLO hysteresis UCC2817 5.8 6.3 V
Maximum shunt voltage UCC2817 15.4 17 17.5 V
VCC turn-on threshold UCC2818 9.7 10.2 10.9 V
VCC turn-off threshold UCC2818 9.4 9.7 V
UVLO hysteresis UCC2818 0.3 0.5 V
Voltage Amplifier
Input voltage 7.309 7.5 7.691 V
VSENSE bias current V
SENSE
= V
REF
, VAOUT = 2.5 V 50 200 nA
Open-loop gain VAOUT = 2 V to 5 V 50 90 dB
High-level output voltage I
L
= – 150 µ A 5.3 5.5 5.6 V
Low-level output voltage I
L
= 150 µ A 0 50 150 mV
Overvoltage Protection and Enable
VREF + VREF + VREF +
Overvoltage reference V
0.48 0.5 0.52
Hysteresis 300 500 600 mV
Enable threshold 1.7 1.9 2.1 V
Enable hysteresis 0.1 0.2 0.3 V
Current Amplifier
Input offset voltage V
CM
= 0 V, V
CAOUT
= 3 V – 3.5 0 2.5 mV
Input bias current V
CM
= 0 V, V
CAOUT
= 3 V – 50 – 100 nA
Input offset current V
CM
= 0 V, V
CAOUT
= 3 V 25 100 nA
Open-loop gain V
CM
= 0 V, V
CAOUT
= 2 V to 5 V 86 dB
V
CM
= 0 V to 1.5 V,
Common-mode rejection ratio 55 80 dB
V
CAOUT
= 3 V
High-level output voltage I
L
= – 120 mA 5.6 6.5 6.9 V
Low-level output voltage I
L
= 1 mA 0.1 0.2 0.5 V
Gain bandwidth product
(1)
2.5 MHz
Voltage Reference
Input voltage 7.3 7.5 7.65 V
Load regulation I
REF
= 1 mA to 2 mA 0 10 mV
Line regulation V
CC
= 10.8 V to 15 V
(2)
0 10 mV
Short-circuit current V
REF
= 0 V – 20 – 25 – 50 mA
Oscillator
Initial accuracy T
A
= 25 ° C 85 100 115 kHz
Voltage stability V
CC
= 10.8 V to 15 V – 1.5% 1.5%
Total variation Line, temperature 80 120 kHz
Ramp peak voltage 4.5 5 5.5 V
(1) Ensured by design, not production tested.
(2) Reference variation for V
CC
< 10.8 V is shown in Figure 8 .
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): UCC2817-EP UCC2818-EP