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BD7700GU Datasheet(PDF) 6 Page - Rohm

Part # BD7700GU
Description  Charge Pump type for Flash
Download  13 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD7700GU Datasheet(HTML) 6 Page - Rohm

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Technical Note
6/12
www.rohm.com
2011.04 - Rev.A
© 2011 ROHM Co., Ltd. All rights reserved.
BD7700GU
Functional Description
1.
“FLASH” and “TORCH” and “Indicate” pin control
“FLASH” and “TORCH” select
“FLASH” and “TORCH” is selected by “CNT0” and “CNT1” pin.
Status is as bellows.
CNT1
CNT0
Status
0
0
All LED OFF
0
1
Indicate
1
0
TORCH
1
1
FLASH
“FLASH” control
“FLASH” status turns “High”, Flash LED Current is occurred, and “FLASH” status turns “Low”, Flash LED Current is
OFF.
“FLASH” status is set by CNT0 pin = “1” and CNT1 pin = “1”.
Flash term is maximum 1s by internal timer.
Fig-4. FLASH control and LED Current
Fig-5. FLASH control and LED Current (with Timer Limit)
CNT0
ILED
(0mA)
300mA
1s
CNT0
ILED
(0mA)
300mA
1s
CNT1
CNT1


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