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TLE4262 Datasheet(PDF) 4 Page - Infineon Technologies AG |
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TLE4262 Datasheet(HTML) 4 Page - Infineon Technologies AG |
4 / 16 page Data Sheet 4 Rev. 2.8, 2008-05-19 TLE 4262 Circuit Description The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and drives the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any over-saturation of the power element. If the externally scaled down output voltage at the reset threshold input drops below 1.35 V, the external reset delay capacitor is discharged by the reset generator. If the voltage on the capacitor reaches the lower threshold V DRL, a reset signal is issued on the reset output and not cancelled again until the upper threshold V DU is exceeded. If the reset threshold input is connected to GND, reset is triggered at an output voltage of 4.5 V. The IC can be switched at the TTL-compatible, low-active inhibit input. It also includes a number of internal circuits for protection against: • Overload • Overtemperature • Reverse polarity Figure 2 Block Diagram AEB01081 Control Amplifier Buffer Reference Bandgap Adjustment Protection Circuit Control and Saturation Temperature Sensor Reset Generator 6 I Q D RO RADJ 3-5, 10-12 14 INH GND 1 7 9 13 |
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