TEA2018A SGS-Thomson-Microelectronics, 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 3) ...
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... 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 2.4 2 ...
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... A 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 ...
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... 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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... Typ. Max. Min. 3.32 0.020 1.65 0.045 0.55 0.014 0.304 0.008 10.92 9.75 0.313 2.54 7.62 7.62 6.6 5.08 3.81 0.125 1. 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 0.060 7/7 ...