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