UC1854
UC2854
UC3854
Unless otherwise stated, V
CC
=18V, R
SET
=15k to ground, C
T
=1.5nF to ground, PKLMT=1V, ENA=7.5V,
ELECTRICAL
V
RMS
=1.5V, I =100
µ
A, I
SENSE
=0V, CA Out=3.5V, VA Out=5V, V
SENSE
=7.5V, no load on SS, CA Out,
CHARACTERISTICS
VA Out, REF,
AC
Drv, –55
o
C<T <125
o
C for the UC1854, –40
o
C<T <85
o
C for the UC2854, and
GT
A
A
0
o
C<T
A
<70
o
C for the UC3854, and T
A
=T
J
.
PARAMETER
CURRENT AMPLIFIER
Current Amp Offset Voltage
I
SENSE
Bias Current
Input Range, I
SENSE
, Mult Out
Current Amp Gain
Current Amp Output Swing
Current Amp Short Circuit Current
Current Amp Gain-BW Product
REFERENCE
Reference Output Voltage
V
REF
Load Regulation
V
REF
Line Regulation
V
REF
Short Circuit Current
MULTIPLIER
Mult Out Current I
AC
Limited
Mult Out Current Zero
Mult Out Current R
SET
Limited
Mult Out Current
TEST CONDITIONS
MIN
–4
–500
–0.3 to 2.5
80
CA Out=0V
T
A
=25
o
C (Note 6)
I
REF
=0mA, T
A
=25
o
C
I
REF
=0mA, Over Temp.
–10mA<I
REF
<0mA
15V<V
CC
<35V
REF=0V
I
AC
=100µA, R
SET
=10k, V
RMS
=1.25V
I
AC
=0µA, R
SET
=15k
I
AC
=450µA, R
SET
=15k, V
RMS
=1V, VA Out = 6V
I
AC
=50µA, V
RMS
=2V, VA=4V
I
AC
=100µA, V
RMS
=2V, VA=2V
I
AC
=200µA, V
RMS
=2V, VA=4V
I
AC
=300µA, V
RMS
=1V, VA=2V
I
AC
=100µA, V
RMS
=1V, VA=2V
(Note 5)
R
SET
=15k
R
SET
=8.2k
C
T
Ramp Peak-to-Valley Amplitude
C
T
Ramp Valley Voltage
GATE DRIVER
Maximum GT Drv Output Voltage 0mA load on GT Drv, 18V<V
CC
<35V
GT Drv Output Voltage High
GT Drv Output Voltage Low, Off
GT Drv Output Voltage Low
Peak GT Drv Current
GT Drv Rise/Fall Time
GT Drv Maximum Duty Cycle
CURRENT LIMIT
PKLMT Offset Voltage
PKLMT Input Current
PKLMT to GT Drv Delay
–200mA load on GT Drv, V
CC
=15V
V
CC
=0V, 50mA load on GT Drv
200mA load on GT Drv
10mA load on GT Drv
10nF from GT Drv to Gnd
1nF from GT Drv to Gnd
V
CA Out
=7V
–36
400
7.4
7.35
–15
–10
–50
–220
–2.0
–280
–50
–38
–165
–250
–95
–120
110
0.5 to 16
–20
800
7.5
7.5
5
2
–28
–200
–0.2
–255
–42
–27
–150
–225
–80
–1.0
55
102
5.4
1.1
14.5
12.8
0.9
1.0
0.1
1.0
35
95
–10
–200
10
–100
175
7.6
7.65
15
10
–12
–180
2.0
–220
–33
–12
–105
–150
–60
TYP
MAX
4
500
UNITS
mV
nA
V
dB
V
mA
kHz
V
V
mV
mV
mA
µA
µA
µA
µA
µA
µA
µA
µA
V
kHz
kHz
V
V
V
V
V
V
V
A
ns
%
mV
µA
ns
–5
Multiplier Gain Constant
OSCILLATOR
Oscillator Frequency
46
86
4.9
0.8
13
12
62
118
5.9
1.3
18
1.5
2.2
0.4
PKLMT=–0.1V
PKLMT falling from 50mV to –50mV
Note 5: Multiplier Gain Constant (k) is defined by:
I
Mult Out
=
k
×
I
AC
× (
VA Out
−
1
)
V
RMS2
Note 6: Guaranteed by design. Not 100% tested in production.
3
TI [ TEXAS INSTRUMENTS ]
