Datasheet

C
DPPM
+ t
DELAY
I
DPPM
+ 4.7 Nf
(21)
R
TMR
+
t
SAFETY*HR
3600 secńhr
K
TMR
+ 50 kW
(22)
TPS65820
www.ti.com .............................................................................................................................................................. SLVS663B – MAY 2006 – REVISED APRIL 2008
Program BAT Short-Circuit Delay (Used for Inserting Battery)
Program 5-Hour Safety timer
Disable/Program TS
R
TS
= 49.9k – fixed resistor to disable TS input.
V
TS
= I
TS
× R
TS
= 20 µ A × 49.9 k Ω = 0.998 V
The TS pin has a 20- µ A current source output that biases the resistor or thermistor. If V
TS
is within the 0.5- to
2.5-V window, normal operation is allowed. If a 503AT thermistor is used, the typical range is 4 ° C to 41 ° C.
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