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
TL1451AC
PARAMETER
Output voltage (pin 16)
Output oltage
O tp t voltage change with temperat re
ith temperature
Input voltage regulation
Output voltage regulation
Short-circuit output current
† All typical values are at TA = 25°C.
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
3
MIN
2.4
TYP†
2.5
–0.1%
–0.2%
2
1
10
MAX
2.6
±1%
±1%
12.5
7.5
30
mV
mV
mA
UNIT
V
undervoltage lockout section
TL1451AC
PARAMETER
Upper threshold voltage (VCC)
Lower threshold voltage (VCC)
Hysteresis (VCC)
Reset threshold voltage (VCC)
† All typical values are at TA = 25°C.
IO( f) = 0 1 mA
O(ref) 0.1 mA,
TA = 25°C
80
1.5
TEST CONDITIONS
MIN
TYP†
2.72
2.6
120
1.9
MAX
UNIT
V
V
mV
V
short-circuit protection control section
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.
TEST CONDITIONS
TA = 25°C
No pullup
No pullup
VI = 0.7 V,
TA = 25°C
–10
TL1451AC
MIN TYP†
MAX
0.65
140
0.7
185
60
–15
1.18
0.75
230
120
–20
UNIT
V
mV
mV
µA
V
oscillator section
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†
200
10%
1%
–0.4%
–0.2%
±2%
±2%
MAX
UNIT
kHz
4
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