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BM81810MUF-M 데이터시트(HTML) 60 Page - Rohm

부품명 BM81810MUF-M
상세내용  Automotive Panel Power Management IC
Download  78 Pages
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제조사  ROHM [Rohm]
홈페이지  http://www.rohm.com
Logo ROHM - Rohm

BM81810MUF-M 데이터시트(HTML) 60 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
PG/LDSW Block Function
PG/LDSW Block can switch PG (Power Good) and LDSW (Load Switch) function by EEPROM.
Case of PG Function,
When GPM Block becomes workable, PG pin will change from High to Low to recognize as all boost sequence is completed.
Case of LDSW Function,
This function is used when VGL voltage output is prior to AVDD voltage output.
With below application construction,
”Timing Chart 3” sequence can be realized.
LDSW on delay can be set by the formula below.
LDSW off delay can be set by the formula below.
where:
AVDD is AVDD setting voltage.
Vth is M_LDSW gate threshold voltage
When using the LDSW function, set the delay3 time to be longer than or equal to the sum of the maximum value including the
variation of the load switch ON delay time and VGL soft start time. If the delay3 time setting is short, UVP is applied at startup.
Figure 98. PG/LDSW Block Diagram
Figure 99. LDSW Function
Figure 100. LDSW Delay Time
PG/LDSW
SEQUENCE
LOGIC
VGL
PG/LDSW
M_LDSW
Gate
Voltage
AVDD
LSW ON Delay
PAVDD
EN
PG/LDSW
M_LDSW
Gate
Voltage
AVDD
LDSW OFF
Delay
PG/LDSW
SEQUENCE
LOGIC
PAVDD
AVDD
R_LSGATE
R_LDSW
C_LDSW
M_LDSW
C_GD


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