UC1638
UC2638
UC3638
Unless otherwise specified; VCC = 15V, VEE =–15V, CT = 680pF, RT = 3k,
ELECTRICAL CHARACTERISTICS
VPVSET = 1.5V, VCOMP = 0V, VCSOUT = 0V, VDB = REF, VEXTREF = 0V, VSD =
VCC – 3V, TA = −55°C to 125°C for the UC1638, −25°C to 85°C for the UC2638,
0°C to 70°C for the UC3638. TA = TJ.
PARAMETER
Overall
TEST CONDITIONS
MIN
TYP
MAX UNITS
Supply Current, Operating
UVLO Threshold
UVLO Hysteresis
Voltage Amplifier
Input Offset Voltage
VSENSE Bias Current
Open Loop Gain
CMRR
15
9
23
10
mA
V
Reference to VEE
Reference to VEE
1
V
COMP = 0V
−15
0
0
0.5
100
100
90
15
2
mV
A
COMP = −5V to +5V
75
70
70
13
dB
dB
dB
V
VCM = −5V to +5V
PSRR
VCM = 0V, VCC − VEE = 10V to 36V
INV = −0.1V, RL = 10k
INV = +0.1V, RL = 10k
VOUT High
13.6
−13.8
12
VOUT Low
–13
V
±
Slew Rate Rising and Falling
Output Source Current
Output Sink Current
Gain Bandwidth Product
5V Reference
Overdrive = 1V
V/µs
mA
mA
MHz
COMP Shorted to VEE
COMP Shorted to VCC
FIN = 100kHz, 10mV p-p
5
15
1
15
40
5
Output Voltage
IREF = −1mA, TA = 25°C
IREF = −1mA
4.925
4.875
−15
5
5
5.075
5.125
15
V
Output Voltage
V
Load Regulation
IREF = −1mA to −10mA
VCC - VEE = 10V to 36V
VREF = 0V
2
mV
mV
mA
Line Regulation
−15
2
15
Short Circuit Current
Oscillator
15
70
Initial Accuracy
TA = 0°C – 70°C
86
76
98
2
110
kHz
%
Voltage Stability
VCC − VEE = 10V to 36V
Line, Temperature
Total Variation
98
0.5
120
3
kHz
µA
V
PVSET Input Bias Current
PVSET Input Voltage Range
Amplitude Limit
(Note 1)
(Note 1)
0.5
VREF
VCC−3
VEE+3
V
AOUT1, BOUT1 Output Drivers
Output Low Voltage
IOUT = 1mA, Ref. to PVE, PVE = 0V
IOUT = 50mA
0.9
1.2
0.1
1.3
1.8
50
V
V
Leakage Current
Output Voltage = 50V
µA
AOUT2, BOUT2 Output Drivers
Output High Voltage
IOUT = −20mA, Ref. to PVE, PVE = 0V
IOUT = −100mA, Ref. to PVE, PVE = 0V
IOUT = −20mA, Ref. to PVE, PVE = VEE
IOUT = 20mA, Ref. to PVE, PVE = 0V
IOUT = 100mA, Ref. to PVE, PVE = 0V
COUT = 1nF
12.2
12
13.5
13.5
14.4
0.4
V
V
Output High Clamp Level
Output Low Voltage
16.5
1
V
V
0.6
2.2
100
100
V
Output Rise Time
Output Fall Time
50
ns
ns
COUT = 1nF
50
3
TI [ TEXAS INSTRUMENTS ]
