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BM81810MUF-M Folha de dados(PDF) 56 Page - Rohm

Nome de Peças BM81810MUF-M
Descrição Electrónicos  Automotive Panel Power Management IC
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BM81810MUF-M Folha de dados(HTML) 56 Page - Rohm

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TSZ02201-0A3A0AS00510-1-2
© 2020 ROHM Co., Ltd. All rights reserved.
15.May.2020 Rev.001
TSZ22111
• 15 • 001
www.rohm.com
VDD Block Function
VDD Block (Buck DC/DC) can set below functions by EEPROM.
1.
VDD Voltage (Register Address 06h [5:0])
VDD voltage can be set by 0.05V step from 0.9V to 3.4V.
2.
SWB Switching Frequency (Register Address 0Ch [3:2])
Switching frequency can be set at 525KHz, 1.05MHz, or 2.1MHz.
3.
VDD Phase Adjust (Register Address 06h [7])
Phase Margin can be adjusted.
0
’b : VD_Phase_Set1
1
’b : VD_Phase_Set2
VIN[V]
VDD[V]
VDD Phase Adjust
0.9 to 1.25
1'b
1.3 to
0'b
3.3
0.9 to
0'b
5
Set VDD Phase Adjust 1
’b when On-duty < 25%.
4.
VDD Mode Select (Register Address 06h [6])
VDD Block can be switched to DC/DC or LDO Mode.
Since this function switch needs to change the application construction,
input writing signal by I2C cannot perform Register writing.
To write this Register setting, start-up bit(REG0Ch[7]) should be
”0”.
Figure 91. VDD Block Diagram
VINB
ERRAMP
PWM
PGNDB
VDD
SWB
VDD
DRIVER
LDO
DAC
REGISTER
DISCHARGE


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