Datasheet

UCC28700, UCC28701
UCC28702, UCC28703
SLUSB41 – JULY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS
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
Bias Supply Input
I
RUN
Supply current, run I
DRV
= 0, run state 2.1 2.65 mA
I
WAIT
Supply current, wait I
DRV
= 0, wait state 85 110
µA
I
START
Supply current, start I
DRV
= 0, V
VDD
= 18 V, start state 1.0 1.5
I
FAULT
Supply current, fault I
DRV
= 0, fault state 2.1 2.8 mA
Under-Voltage Lockout
V
VDD(on)
VDD turn-on threshold V
VDD
low to high 19 21 23
V
V
VDD(off)
VDD turn-off threshold V
VDD
high to low 7.7 8.1 8.45
VS Input
V
VSR
Regulating level Measured at no-load condition, T
J
= 25°C 4.01 4.05 4.09 V
V
VSNC
Negative clamp level I
VS
= -300 µA, volts below ground 190 250 325 mV
I
VSB
Input bias current V
VS
= 4 V -0.25 0 0.25 µA
CS Input
V
CST(max)
Max CS threshold voltage V
VS
= 3.7 V
(1)
715 750 775
mV
V
CST(min)
Min CS threshold voltage V
VS
= 4.35 V
(1)
230 250 270
K
AM
AM control ratio V
CST(max)
/ V
CST(min)
2.75 3.0 3.15 V/V
constant-current regulating
V
CCR
CC regulation constant 310 319 329 mV
level
Line compensating current
K
LC
I
VSLS
= -300 µA, I
VSLS
/ current out of CS pin 23 25 28 A/A
ratio
T
CSLEB
Leading-edge blanking time DRV output duration, V
CS
= 1 V 195 235 275 ns
DRV
I
DRS
DRV source current V
DRV
= 8 V, V
VDD
= 9 V 20 25 mA
R
DRVLS
DRV low-side drive resistance I
DRV
= 10 mA 6 12 Ω
V
DRCL
DRV clamp voltage V
VDD
= 35 V 14 16 V
R
DRVSS
DRV pull-down in start state 150 200 230 kΩ
Timing
f
SW(max)
Maximum switching frequency V
VS
= 3.7 V
(1)
120 130 140 kHz
f
SW(min)
Minimum switching frequency V
VS
= 4.35 V
(1)
875 1000 1100 Hz
T
ZTO
Zero-crossing timeout delay 1.8 2.1 2.45 µs
(1) These devices automatically vary the control frequency and current sense thresholds to improve EMI performance, these threshold
voltages and frequency limits represent average levels.
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