UC1846/7
UC2846/7
UC3846/7
(Unless otherwise stated, these specifications apply for T
A
=-55°C to +125°C for UC1846/7;
ELECTRICAL
-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; V
IN
=15V, R
T
=10k,
CHARACTERISTICS (cont.)
C
T
=4.7nF, T
A
=T
J
.)
UC1846/UC1847
PARAMETER
Oscillator Section
Initial Accuracy
Voltage Stability
Temperature Stability
Sync Output High Level
Sync Output Low Level
Sync Input High Level
Sync Input Low Level
Sync Input Current
Error Amp Section
Input Offset Voltage
Input Bias Current
Input Offset Current
Common Mode Range
Open Loop Voltage Gain
Unity Gain Bandwidth
CMRR
PSRR
Output Sink Current
Output Source Current
High Level Output Voltage
Low Level Output Voltage
Current Sense Amplifier Section
Amplifier Gain
Maximum Differential Input
Signal (V
PIN 4
-V
PIN 3
)
Input Offset Voltage
CMRR
PSRR
Input Bias Current
Input Offset Current
Input Common Mode Range
Delay to Outputs
Current Limit Adjust Section
Current Limit Offset
Input Bias Current
Shutdown Terminal Section
Threshold Voltage
Input Voltage Range
Minimum Latching Current
(I
PIN 1
)
(Note 6)
3.0
1.5
3.0
1.5
mA
250
0
350
400
V
IN
250
0
350
400
V
IN
mV
V
V
PIN 3
=0V, V
PIN 4
=0V, Pin 7 Open
(Note 3)
V
PIN 5
=V
REF
, V
PIN 6
=0V
0.45
0.5
-10
0.55
-30
0.45
0.5
-10
0.55
-30
V
µA
T
J
=25°C, (Note 2)
V
PIN 3
=0V, Pin 1 Open (Notes 3 & 4)
Pin 1 Open (Note 3)
R
L
(Pin 7)=15kW
V
PIN 1
=0.5V, Pin 7 Open (Note 3)
V
CM
=1V to 12V
V
IN
=8V to 40V
V
PIN 1
=0.5V, Pin 7 Open (Note 3)
V
PIN 1
=0.5V, Pin 7 Open (Note 3)
0
200
60
60
1.1
1.2
5
83
84
-2.5
0.08
-10
1
V
IN
-3
500
0
200
25
60
60
1.1
1.2
5
83
84
-2.5
0.08
-10
1
V
IN
-3
500
25
V
mV
dB
dB
µA
µA
V
ns
2.5
2.75
3.0
2.5
2.75
3.0
V
V
IN
=8V to 40V
∆V
O
=1.2 to 3V, V
CM
=2V
T
J
=25°C (Note 2)
V
CM
=0V to 38V, V
IN
=40V
V
IN
=8V to 40V
V
ID
=-15mV to -5V, V
PIN 7
=1.2V
V
ID
=15mV to 5V, V
PIN 7
=2.5V
R
L
=(Pin 7) 15kΩ
0
80
0.7
75
80
2
-0.4
4.3
105
1.0
100
105
6
-0.5
4.6
0.7
1
0.5
-0.6
40
5
-1
250
V
IN
-2V
0
80
0.7
75
80
2
-0.4
4.3
105
1.0
100
105
6
-0.5
4.6
0.7
1
0.5
-0.6
40
10
-2
250
V
IN
-2V
mV
µA
nA
V
dB
MHz
dB
dB
mA
mA
V
V
Pin 8=0V
Pin 8=0V
Sync Voltage=3.9V, Pin 8=0V
1.3
3.9
2.5
1.5
1.3
T
J
=25°C
V
IN
=8V to 40V
Over Operating Range (Note 2)
3.9
39
43
-1
-1
4.35
2.3
2.5
3.9
2.5
1.5
3.9
47
2
39
43
-1
-1
4.35
2.3
2.5
47
2
kHz
%
%
V
V
V
V
mA
TEST CONDITIONS
UC2846/UC2847
MIN.
TYP.
MAX.
UC3846/UC3847
MIN.
TYP.
MAX. UNITS
3
TI [ TEXAS INSTRUMENTS ]
