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TEA2018A Datasheet

  • TEA2018A

  • CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT

  • 7頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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TEA2018A
CURRENT MODE SWITCHING
POWER SUPPLY CONTROL CIRCUIT
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DIRECT DRIVE OF THE EXTERNAL
SWITCHING TRANSISTOR
POSITIVE AND NEGATIVE OUTPUT CUR-
RENTS UP TO 0.5 A
CURRENT LIMITATION
TRANSFORMER DEMAGNETIZATION
SENSING
FULL OVERLOAD AND SHORT-CIRCUIT
PROTECTION
PROPORTIONAL BASE CURRENT DRIVING
LOW STANDBY CURRENT BEFORE START-
ING (< 1.6 mA)
THERMAL PROTECTION
DESCRIPTION
The TEA2018A is an 8-pin DIP low-cost integrated
circuit designed for the control of switch mode
power supplies.
Due to its current mode regulation, the TEA2018A
facilitates design of power supplies with following
features :
High stability regulation loop
Automatic input voltage feed-forward in dis-
continuous mode fly-back
Automatic pulse-by-pulse current limitation
Typical applications : Video Display Units, TV sets,
typewriters, microcomputers and industrialapplica-
tions
Where synchronization is required, use the
TEA2019. For more details, see application
note AN406/0591
PIN CONNECTIONS
DIP8
(Plastic Package)
ORDER CODE :
TEA2018A
OSCILLATOR
GROUND
COLLECTOR CURRENT SENSING
NEGATIVE SUPPLY VOLTAGE
1
2
3
4
8
7
6
5
ERROR AMPLIFIER NON-INVERTING INPUT
DEMAGNETIZATION SENSING
POSITIVE SUPPLY VOLTAGE
2018A-01.EPS
OUTPUT
May 1993
1/7

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