參數(shù)資料
型號: TPS61045DRB
廠商: Texas Instruments, Inc.
英文描述: DIGITALLY ADJUSTABLE LCD BOOST CONVERTER
中文描述: 數(shù)字可調(diào)液晶Boost變換器
文件頁數(shù): 10/20頁
文件大?。?/td> 499K
代理商: TPS61045DRB
www.ti.com
t
d1
t
(DWN)
t
d1
t
(OFF)
Device Enabled
Device Disabled
High
Low
EN
t
d1
t
(UP)
TPS61045
SLVS440A–JANUARY 2003–REVISED SEPTEMBER 2003
DETAILED DESCRIPTION (continued)
Table 1. Timing Table
DAC OUTPUT DO
TIME
LOGIC LEVEL
Increase one step
t
(UP)
= 1 μs to 60 μs
t
(DWN)
= 140 μs to 240 μs
t
(OFF)
560 μs
t
d1
= 1 μs
Low
Decrease one step
Low
Shutdown
Low
Delay between steps
High
Figure 16. CTRL Timing Diagram
UNDERVOLTAGE LOCKOUT
An undervoltage lockout feature prevents misoperation of the device at input voltages below 1.5 V (typ). As long
as the input voltage is below the undervoltage threshold the device remains off, with the input switch (Q1) and
the main switch (Q2) open.
THERMAL SHUTDOWN
An internal thermal shutdown is implemented in the TPS61045 that shuts down the device if the typical junction
temperature of 160
°
C is exceeded. If the device is in thermal shutdown mode, the input switch (Q1) and the main
switch (Q2) are open.
10
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