TL1454CPW Datasheet, PDF (10/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454, TL1454Y
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997
electrical characteristics over recommended operating free-air temperature range, V_CC = 6 V,
f_osc = 500 kHz (unless otherwise noted) (continued)
supply current
PARAMETER
TEST CONDITIONS
TL1454
UNIT
MIN TYP MAX
ICC(stby)
Standby supply current
ICC(average) Average supply current
RT open, CT = 1.5 V, No load,
VO (COMP1, COMP2) = 1.25 V,
RT = 10 kΩ,
50% duty cycle,
CT = 120 pF,
Outputs open
3.1
6 mA
3.5
7 mA
electrical characteristics, V_CC = 6 V, f_osc = 500 kHz, T_A = 25°C (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454Y
MIN TYP MAX
Vref
Output voltage, REF
IO = 1 mA,
Input regulation
VOC = 3.6 V to 20 V, IO = 1 mA
Output regulation
IO = 0.1 mA to 1 mA
Output voltage change with temperature
IO = 1 mA
IO = 1 mA
IOS
Short-circuit output current
Vref = 0 V
1.25
2
1
– 1.25
–2.5
30
UNIT
V
mV
mV
mV
mA
undervoltage lockout (UVLO)
PARAMETER
VIT ₊
VIT _–
Vhys
Positive-going threshold voltage
Negative-going threshold voltage
Hysteresis, VIT ₊ – VIT _–
TEST CONDITIONS
TL1454Y
MIN TYP MAX
2.9
2.7
200
UNIT
V
V
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
VIT
Vstby†
VI(latched)
Input threshold voltage
Standby voltage
Latched-mode input voltage
No pullup
VIT(COMP) Comparator threshold voltage
COMP1, COMP2
Input source current
VO(SCP) = 0
† _{This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology.}
TL1454Y
MIN TYP MAX
1
185
60
1
– 15
UNIT
V
mV
mV
V
µA
oscillator
PARAMETER
fosc
Frequency
Standard deviation of frequency
Frequency change with voltage
Frequency change with temperature
Maximum ramp voltage
Minimum ramp voltage
TEST CONDITIONS
CT = 120 pF,
RT = 10 kΩ
VCC = 3.6 V to 20 V
TL1454Y
MIN TYP MAX
500
50
5
–2
– 10
1.8
1.1
UNIT
kHz
kHz
kHz
kHz
V
V
10
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