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BD9P105MUF-CE2 Folha de dados(PDF) 8 Page - Rohm

Nome de Peças BD9P105MUF-CE2
Descrição Electrónicos  3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BD9P105MUF-CE2 Folha de dados(HTML) 8 Page - Rohm

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© 2019 ROHM Co., Ltd. All rights reserved.
28.Apr.2020 Rev.001
www.rohm.com
TSZ22111 • 15 • 001
BD9P1x5MUF-C Series
TSZ02201-0J1J0AL01500-1-2
Description of Blocks - continued
-
PWM Comp
This block compares the output voltage of the GmAmp2 (Vc) and the saw tooth waveform (Vr) to control the switching
duty.
-
Ramp
This block generates the saw tooth waveform (Vr) from the clock signal generated by OSC.
-
Control Logic
This block controls switching operation and protection functions.
-
Driver
This circuit drives the gates of the output FETs.
-
Sleep Comp
If output/feedback voltage becomes 101.3 % (Typ) or more, this block puts the device into SLEEP state. This state is
released when output/feedback voltage becomes 101.0 % (Typ) or less.
-
ZX Comp
This block stops the switching by detecting reverse current of the SW current at LLM control.
-
HOCP Comp
This block detects the current flowing through the High Side FET and limits the current of 2.2 A (Min) or more. This
function works in abnormal situation such as the SW pin shorted to GND condition in order to prevent the High Side FET
from destruction.
-
Reset
When the output voltage reaches -4.7 % (Typ) or more of the normal regulation voltage, the open drain MOSFET
connected to the RESET pin turns off in 3.6 ms (Typ) and the output of the RESET pin becomes high by its external
pull-up resistor.
When the output voltage reaches -7.2 % (Typ) or less, the RESET pin open drain MOSFET turns on and the RESET pin
is pulled down with an impedance of 190 Ω (Typ).
-
Discharge
This block discharges the output voltage during EN is low and before VOUT start up. The VOUT_DIS pin is pulled down
with an impedance of 75 Ω (Typ).


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