TEA2018 데이터 시트보기 (PDF) - STMicroelectronics

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TEA2018

CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT

STMicroelectronics 

TEA2018A

BLOCK DIAGRAM

TEA2018A

IS 7

DEMAGNETIZATION

SENSING

0.1V

VCC

6

INTERNAL

BIAS

VCC

MONITORING

VCC

” Good”

V REF

2.4V

Undervoltage

Rt Ct 1

OSCILLATOR

MAXIMUM

DUTY CYCLE

70%

COMPARATOR

8

G ≅ 50

2.4V

-1V

VOLTAGE

LIMITATION

&

FLIP-FLOP

Ic

RECOPY

&

1

DELAY

500ns

1

THERMAL

SHUTDOWN

5 OUTPUT

3

I SENSE

2

4

GROUND

V CC

ABSOLUTE MAXIMUM RATINGS

Symbol

VCC+

VCC-

IO(peak)

II

Tj

Toper

Tstg

Parameter

Positive Supply Voltage

Negative Supply Voltage

Peak Output Current (duty cycle < 5%)

Input Current (Pin 3)

Junction Temperature

Operating Ambient Temperature Range

Storage Temperature Range

Value

15

-5

±1

±5

+150

-20, +70

-40, +150

Unit

V

V

A

mA

oC

oC

oC

THERMAL DATA

Symbol

Rth (j-a)

Parameter

Junction-ambient Thermal Resistance

Value

80

Unit

oC/W

ELECTRICAL OPERATING CHARACTERISTICS

Tamb = 25oC, potentials referenced to ground (unless otherwise specified) (see test circuit)

Symbol

VCC+

VCC-

VCC(start)

VCC(stop)

Parameter

Positive Supply Voltage

Negative Supply Voltage

Minimum Positive Supply Voltage required for starting (VCC+ rising)

Minimum Positive Voltage below wich device stops operating (VCC+ falling)

Min. Typ. Max. Unit

6.6 8 15 V

-1 -3 -5 V

6 6.6 V

4.2 4.9 5.6 V

2/7

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