參數(shù)資料
型號: HCD66717A13BP
廠商: Hitachi,Ltd.
英文描述: TRANSISTOR,BJT,NPN,700V V(BR)CEO,8A I(C),TO-247VAR
中文描述: (低功耗點陣液晶顯示控制器/驅(qū)動器)
文件頁數(shù): 51/90頁
文件大?。?/td> 716K
代理商: HCD66717A13BP
HD66717
503
Power Supply for Liquid Crystal Display Drive
When External Power Supply and Internal Operational Amplifiers are Used
To supply LCD drive voltage directly from the external power supply without using the internal booster,
circuits should be connected as shown in Figure 30. Here, contrast can be adjusted through the CT bits of
the contrast-control instruction.
The HD66717 incorporates a voltage-follower operational amplifier for each of V1 to V5 to reduce
current flowing through the internal bleeder-resistors, which generate different levels of liquid-crystal
drive voltages. Thus, potential differences between V
CC
and V1 and between V
EE
and V5 must be 0.4V or
greater. Note that the OPOFF pin must be grounded when using the operational amplifiers.
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