TEA2018A STMicroelectronics, TEA2018A Datasheet
TEA2018A
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TEA2018A Summary of contents
Page 1
... 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 . ...
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... TEA2018A BLOCK DIAGRAM TEA2018A DEMAGNETIZATION I 7 SENSING S 0. OSCILLATOR t t MAXIMUM DUTY CYCLE 70% COMPARATOR 2.4V -1V VOLTAGE LIMITATION 3 I SENSE ABSOLUTE MAXIMUM RATINGS Symbol V + Positive Supply Voltage Negative Supply Voltage CC I (peak) Peak Output Current (duty cycle < 5 Input Current (Pin Junction Temperature ...
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... Output Current O f Operating Frequency oper TEST CIRCUIT 59k 1% 1.2nF 1% Parameter + < CC(start +8V (+8V < < +14V 1nF) t Parameter 470 10 22nF 22nF TEA2018A 22nF 4.7nF 100 TEA2018A Min. Typ. Max. Unit 0.7 1.1 1 1.6 mA -1100 -1000 -880 mV 1000 75 100 125 2.3 2 0.5 %/V ...
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... Outside the regulation area and in the on(max) absence of current limitation, the maximum con- function at duction time is set at about the period minimum conducting time is ensured on(min) during each period (see Figure 2) - Supply voltage monitoring : The TEA2018A will stop operating if V threshold level OUTPUT FILTER FLIP-FLOP OSCILLATOR ...
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... Figure TEA2018A 5 3 SCHEMATICS OF INPUTS AND OUTPUTS + DISCH. OSC on(min 0. ref 0. 0. GND Ic TEA2018A COLLECTOR CURRENT BIAS CURRENT 5/7 ...
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... Operating Frequency 30kHz 6/7 V rising]. CC During this time the TEA2018A draws only 1mA (typically). When the voltage on pin 6 reaches this threshold, base drive pulses appear. The energy drawn by these pulses tends to dis- charge the power supply storage capacitor. How- ever a hysteresis of about 1.1V (typically implemented to avoid the device from stopping ...
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... C system, is granted provided that the system conforms to C Standard Specifications as defined by Philips. TEA2018A b1 Inches Typ. Max. 0.131 0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 ...