P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
TL431/TL431A/TL431B
P
R E C I S I O N P R O G R A M M A B L E R E F E R E N C E S
P R O D U C T I O N D A T A S H E E T
APPLICATION INFORMATION
R3 (see Note)
VBATT
12V
R1A
IO
R4
(Note)
TL431/A
& TL431B
TL431/A
& TL431B
RS
0.1%
R2A
R2B
R1B
R2B
Low Limit = 1 +
High Limit = 1 +
V
V
*
*
REF
LED On when
Low Limit < VBATT < High Limit
R1B
R2B
VREF
RS
REF
IO =
Note: R3 and R4 are selected to provide the desired LED intensity and≥ 1mA
cathode current to the TL431/A & TL431B at the available V+.
FIGURE 20 — VOLTAGE MONITOR
FIGURE 21 — PRECISION CONTANT-CURRENT SINK
PRODUCTIONDATA-InformationcontainedinthisdocumentisproprietarytoLinFinity, andiscurrentasofpublicationdate. Thisdocument
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright © 1999
Rev. 1.3 9/99
12
MICROSEMI [ Microsemi ]
