Datasheet

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UCC2810
UCC3810
SLUS162D – FEBRUARY 1999 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
All parameters are the same for both channels, –40°C ≤ T
A
≤ 85°C for the UCC2810, 0°C ≤ T
A
≤ 70°C for the UCC3810,
V
CC
= 10 V ; R
T
= 150 k Ω , C
T
= 120 pF; no load; T
A
= T
J;
(unless otherwise specified)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
PWM
R
T
= 150 k Ω , C
T
= 120 pF 45% 49% 50%
Maximum duty cycle
(2)
R
T
= 30 k Ω , C
T
= 120 pF 40% 45% 48%
Minimum on-time CS = 1.2 V, COMP = 5 V 130 ns
OUTPUT
I
OUT
= 20 mA 0.12 0.42
V
OL
Low-level output voltage I
OUT
= 200 mA 0.48 1.10
I
OUT
= 20 mA, V
CC
= 0 V 0.7 1.2 V
I
OUT
= –20 mA 0.15 0.42
V
OH
High-level output voltage (V
CC
– OUT)
I
OUT
= –200 mA 1.2 2.3
t
R
Rise time, OUT C
OUT
= 1 nF 20 50
ns
t
F
Fall time, OUT C
OUT
= 1 nF 30 60
UNDERVOLTAGE LOCKOUT (UVLO)
Start threshold voltage 9.6 11.3 13.2
Stop threshold voltage 7.1 8.3 9.5 V
Start-to-stop hysteresis 1.7 3.0 4.7
ENABLE2 input bias current ENABLE2 = 0 V -20 -35 -55 µA
ENABLE2 input threshold voltage 0.80 1.53 2.00 V
OVERALL
Startup current V
CC
< Start threshold voltage 0.15 0.25
Operating supply current, outputs off VCC = 10 V, FB = 2.75 V 2 3
VCC = 10 V, FB = 0 V, 3.2 5.1
mA
CS = 0 V, RT = 150 k Ω
Operating supply current, outputs on
VCC = 10 V, FB = 0 V, 8.5 14.5
CS = 0 V, RT = 30 k Ω
VCC internal zener voltage I
CC
= 10 mA 11.0 12.9 14.0
V
VCC internal zener voltage minus start 0.4 1.2
threshold voltage
4
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