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LED2001PHR Arkusz danych(PDF) 11 Page - STMicroelectronics

Numer części LED2001PHR
Szczegółowy opis  4 A monolithic step-down current source with synchronous rectification
PDF  42 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED2001PHR Arkusz danych(HTML) 11 Page - STMicroelectronics

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LED2001
Functional description
The error amplifier output is compared with the inductor current sense information to
perform PWM control.
5.5
Thermal shutdown
The shutdown block generates a signal that disables the power stage if the temperature of
the chip goes higher than a fixed internal threshold (150 ± 10 °C typical). The sensing
element of the chip is close to the PDMOS area, ensuring fast and accurate temperature
detection. A 15 °C typical hysteresis prevents the device from turning ON and OFF
continuously during the protection operation.
Table 5. Uncompensated error amplifier characteristics
Description
Value
Transconductance
250 µS
Low frequency gain
96 dB
CC
195 pF
RC
70 K
Ω



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