TEA2018A Ver la hoja de datos (PDF) - STMicroelectronics
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TEA2018A Datasheet PDF : 7 Pages
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TEA2018A
CURRENT MODE SWITCHING
POWER SUPPLY CONTROL CIRCUIT
. 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
1
GROUND
2
COLLECTOR CURRENT SENSING
3
NEGATIVE SUPPLY VOLTAGE
4
8
ERROR AMPLIFIER NON-INVERTING INPUT
7
DEMAGNETIZATION SENSING
6
POSITIVE SUPPLY VOLTAGE
5
OUTPUT
May 1993
1/7
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