TL1451A Datasheet, PDF (4/29 Pages) Texas Instruments – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
electrical characteristics over recommended operating free-air temperature range, V_CC = 6 V,
f = 200 kHz (unless otherwise noted)
reference section
PARAMETER
Output voltage (pin 16)
Output voltage change with temperature
Input voltage regulation
Output voltage regulation
Short-circuit output current
† _{All typical values are at TA = 25°C.}
undervoltage lockout section
TEST CONDITIONS
IO = 1 mA
TA = –20°C to 25°C
TA = 25°C to 85°C
VCC = 3.6 V to 40 V
IO = 0.1 mA to 1 mA
VO = 0
TL1451AC
MIN TYP† MAX
2.4
2.5 2.6
– 0.1% ±1%
– 0.2% ±1%
2 12.5
1 7.5
3
10
30
UNIT
V
mV
mV
mA
PARAMETER
Upper threshold voltage (VCC)
Lower threshold voltage (VCC)
Hysteresis (VCC)
Reset threshold voltage (VCC)
† _{All typical values are at TA = 25°C.}
short-circuit protection control section
TEST CONDITIONS
IO(ref) = 0.1 mA, TA = 25°C
TL1451AC
MIN TYP† MAX
2.72
2.6
80 120
1.5 1.9
UNIT
V
V
mV
V
PARAMETER
Input threshold voltage (SCP)
Standby voltage (SCP)
Latched input voltage (SCP)
Input (source) current
Comparator threshold voltage (FEEDBACK)
† _{All typical values are at TA = 25°C.}
oscillator section
TEST CONDITIONS
TA = 25°C
No pullup
No pullup
VI = 0.7 V,
TA = 25°C
TL1451AC
MIN TYP† MAX
0.65 0.7 0.75
140 185 230
60 120
–10 –15 –20
1.18
UNIT
V
mV
mV
µA
V
PARAMETER
Frequency
Standard deviation of frequency
Frequency change with voltage
Frequency change with temperature
† _{All typical values are at TA = 25°C.}
TEST CONDITIONS
CT = 330 pF,
CT = 330 pF,
VCC = 3.6 V to 40 V
TA = –20°C to 25°C
TA = 25°C to 85°C
RT = 10 kΩ
RT = 10 kΩ
TL1451C
MIN TYP† MAX
200
10%
1%
– 0.4% ± 2%
– 0.2% ± 2%
UNIT
kHz
4
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