TL1454, TL1454Y

DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)

CONTROL CIRCUIT

SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997

10

POST OFFICE BOX 655303

POST OFFICE BOX 1443

supply current

PARAMETER

TEST CONDITIONS

TL1454

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICC(stby)

Standby supply current

RT open,

CT = 1.5 V, No load,

VO (COMP1, COMP2) = 1.25 V,

3.1

6

mA

ICC(average)

Average supply current

RT = 10 kΩ,

50% duty cycle,

CT = 120 pF,

Outputs open

3.5

7

mA

reference

PARAMETER

TEST CONDITIONS

TL1454Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Vref

Output voltage, REF

IO = 1 mA,

1.25

V

Input regulation

VOC = 3.6 V to 20 V,

IO = 1 mA

2

mV

Output regulation

IO = 0.1 mA to 1 mA

1

mV

Output voltage change with temperature

IO = 1 mA

– 1.25

mV

Output voltage change with temperature

IO = 1 mA

–2.5

mV

IOS

Short-circuit output current

Vref = 0 V

30

mA

undervoltage lockout (UVLO)

PARAMETER

TEST CONDITIONS

TL1454Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIT +

Positive-going threshold voltage

2.9

V

VIT –

Negative-going threshold voltage

2.7

V

Vhys

Hysteresis, VIT + – VIT –

200

mV

short-circuit protection (SCP)

PARAMETER

TEST CONDITIONS

TL1454Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIT

Input threshold voltage

1

V

Vstby†

Standby voltage

No pullup

185

mV

VI(latched)

Latched-mode input voltage

No pullup

60

mV

VIT(COMP)

Comparator threshold voltage

COMP1, COMP2

1

V

Input source current

VO(SCP) = 0

–15

µA

† This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology.

oscillator

PARAMETER

TEST CONDITIONS

TL1454Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

fosc

Frequency

CT = 120 pF,

RT = 10 kΩ

500

kHz

Standard deviation of frequency

50

kHz

Frequency change with voltage

VCC = 3.6 V to 20 V

5

kHz

Frequency change with temperature

–2

kHz

Frequency change with temperature

–10

kHz

Maximum ramp voltage

1.8

V

Minimum ramp voltage

1.1

V