psb2120 Infineon Technologies Corporation, psb2120 Datasheet
psb2120
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psb2120 Summary of contents
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ISDN Remote Power Controller (IRPC) Features Switched mode DC/DC-converter Switched mode DC/DC-converter CCITT (I.430) ISDN compatible Integrated 200 V power FET (only PSB 2120-P in P-DIP-22) Low power dissipation Supply voltage range Input undervoltage detection ...
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Pin Configurations (top view) P-DSO-24 Semiconductor Group P-DIP-22 2 PSB 2120 ...
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Pin Definitions and Functions Pin Pin Symbol Input (I) No. No. P-DSO P-DIP 1 1 SYNC COMP EME 8 8 POL ...
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Pin Definitions and Functions (cont’d) Pin Pin Symbol Input (I) No. No. P-DSO P-DIP 15 13 ENA GND EXT ...
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Figure 1 IRPC Functional Diagram Semiconductor Group 5 PSB 2120 ...
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Functional Description The reference provides a 4.0 V voltage for the regulation loop. A high gain error amplifier compares the reference voltage with the switch mode supply output voltage. The output of the error amplifier is compared with a periodic ...
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Figure 2 DC/DC-Conversion The PSB 2120 contains a SIPMOS-transistor for power handling. Non-isolated and isolated SMPS- configurations are possible. Logic and analog circuits are implemented in CMOS in order to achieve low power dissipation. The error amplifier compares the sensed ...
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Polarity Detection Emergency conditions are signaled to the TE by the reversed polarity of the line feeding voltage. When polarity reversal is detected via pin POL of the PSB 2120, emergency conditions are signaled to the microprocessor via pin EME, ...
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PSB 2120 Applications in ISDN-Environments Figure 3 shows an example out of the wide application field of the PSB 2120. In the network termination one PSB 2120 supplies the internal IC’s directly from the U–interface. A second IRPC, also powered ...
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Figure 3 IRPC in ISDN-Concept Semiconductor Group 10 PSB 2120 ...
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Switching Frequency Figure 4 Switching Frequency as a Function of Semiconductor Group R C and PSB 2120 ...
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Figure 5 PSB 2120 Minimum Configuration Semiconductor Group 12 PSB 2120 ...
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Figure 6 Advanced IRPC-Application with Power Housekeeping and Polarity Reversal Detection Semiconductor Group 13 PSB 2120 ...
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According to the application in figure 5 and an output power of 500 mW, will be 400 ms and Figure 7 Generation of a P-Reset Signal with the PSB 2120 Semiconductor Group PSB 2120 t ...
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Figure 8 PSB 2120 in Flyback Configuration with Transformer Isolation Semiconductor Group 15 PSB 2120 ...
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Figure 9 PSB 2120 in Flyback Configuration with Opto Isolation Semiconductor Group 16 PSB 2120 ...
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Absolute Maximum Ratings (All pin references made for P-DIP-22) Parameter Supply voltage DR (pin 10) referred to S0 (pin 11) Continuous drain current (pin 10) Supply voltage V (pin 22) referred to GND BAT Analog/digital input voltage referred to GND ...
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DC Characteristics (cont’d) Parameter Oscillator SYNC (pin1), RC (pin kHz OSC Initial accuracy f Voltage stability of OSC f Temperature stability of OSC Max. frequency H-sawtooth voltage L-sawtooth voltage ...
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DC Characteristics (cont’d) Parameter Pulse Width Modulator Duty cycle Undervoltage Detection Start-up threshold Threshold hysteresis C Soft Start (pin 6) SS Charging current Output Driver GA (pin ˚ – Power FET A L ...
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DC Characteristics (cont’d) Parameter Comparator CN (pin 15), CP (pin 16), Input offset voltage Input bias current Input voltage range Response time to signal at CO (pin 14 Short Circuit (pin 12), I Sense voltage Polarity Detection POL ...