TL1454A_14 Datasheet, PDF (8/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454A, TL1454AY
DUALĆCHANNEL PULSEĆWIDTHĆMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
recommended operating conditions
Supply voltage, VCC
Error amplifier common-mode input voltage
Output voltage, VO
Output current, IO
COMP source current
COMP sink current
Reference output current
COMP dc load resistance
Timing capacitor, CT
Timing resistor, RT
Oscillator frequency
Operating free-air temperature, TA
TL1454AC
MIN
3.6
− 0.2
100
10
5.1
50
− 20
MAX
20
1.45
20
± 40
− 45
100
1
4000
100
2000
85
UNIT
V
V
V
mA
µA
µA
mA
kΩ
pF
kΩ
kHz
°C
electrical characteristics over recommended operating free-air temperature range, V_CC = 6 V,
f_osc = 500 kHz (unless otherwise noted)
reference
PARAMETER
Vref
Output voltage, REF
Input regulation
Output regulation
Output voltage change with temperature
IOS
Short-circuit output current
TEST CONDITIONS
IO = 1 mA,
IO = 1 mA
VOC = 3.6 V to 20 V,
IO = 0.1 mA to 1 mA
TA = TA(min) to 25°C,
TA = 25°C to 85°C,
Vref = 0 V
TA = 25°C
IO = 1 mA
IO = 1 mA
IO = 1 mA
TL1454A
MIN TYP MAX
1.22 1.26 1.32
1.20
1.34
2
6
1 7.5
−12.5 −1.25 12.5
−12.5 −2.5 12.5
30
UNIT
V
mV
mV
mV
mA
undervoltage lockout (UVLO)
VIT ₊
VIT _−
Vhys
PARAMETER
Positive-going threshold voltage
Negative-going threshold voltage
Hysteresis, VIT ₊ − VIT _−
TEST CONDITIONS
TA = 25°C
TL1454A
MIN TYP MAX
2.9
2.7
100 200
UNIT
V
V
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
VIT
Vstby†
VI(latched)
Input threshold voltage
Standby voltage
Latched-mode input voltage
TA = 25°C
No pullup
VIT(COMP) Comparator threshold voltage
COMP1, COMP2
Input source current
TA = 25°C,
VO(SCP) = 0
† _{This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology.}
TL1454A
MIN TYP MAX
0.93
1 1.07
140 185 230
60 120
1
−5 −15 −20
UNIT
V
mV
mV
V
µA
8
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265