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BM81810MUF-M 데이터시트(PDF) 51 Page - Rohm

부품명 BM81810MUF-M
부품 상세설명  Automotive Panel Power Management IC
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제조업체  ROHM [Rohm]
홈페이지  http://www.rohm.com
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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
VGH Block Function
VGH Block (Positive Charge Pump) can set below functions by EEPROM.
1.
VGH (HOT) Voltage (Register Address 01h [7:0])
VGH (HOT) voltage can be set in 0.2V step from 8.0V to 35.0V.
2.
DRP Switching Frequency (Register Address 0Ch [5:4])
Switching frequency can be set at AVDD frequency x1, x1/2, or x1/4.
3.
VGH (COLD) Voltage (Register Address 02h [6:0])
To set VGH (COLD) voltage can have the VGH voltage relates to NTC Pin voltage, when NTC Function is used.
VGH (COLD) voltage range can be set in 0.2V step from VGH (HOT) + 0V to VGH (HOT) + 15.0V.
Refer
“NTC Block Function” for the detail description of NTC Function.
4.
VGH Mode Select (Register Address 0Ch [6])
Boost Stage of Positive Charge Pump can be set by x2, x3, or x4.
x2, x3 can be formed with internal element by EEPROM setting.
x4 can be formed by connecting with external Diode.
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”.
The VGH voltage output range with the AVDD voltage is related, and may take UVP without being able to output the
VGH voltage of the setting when do not choose appropriate constitution.
Please choose appropriate constitution referring after the following pages.
5.
VGH Discharge enable (Register Address 0Ah [7])
When OFF sequence, VGH pin Discharge function can be Enable/Disable.
This function is to confirm when IC starts to operate. If read-and-write is performed after IC starts, the first time
OFF sequence will not be reflected.
Figure 83. VGH Block Diagram
level shift
DRP
VGH
CPP2
level shift
REGISTER
VGH
DRIVER
ERRAMP
CP_CLK
level shift
level shift
VCP
CPP1
DAC
AVDD
DISCHARGE


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