TPS53632 Datasheet, PDF (28/43 Pages) Texas Instruments – 3-2-1 Phase D-CAP+™ Step-Down Driverless Controller for Low-Voltage Applications with I2C Interface Control

TPS53632
SLUSBW8 – SEPTEMBER 2014
www.ti.com
8.2.1.2.8 Step 8: Current Monitor (IMON) Setting
Set the analog current monitor so that at I_CC(max) the IMON pin voltage is 1.7 V. This corresponds to a digital I_OUT
value of ‘FF’ in I²C register 03H. The voltage on the IMON pin is shown in Equation 16.
&_{ÂÆÈÇ}
L
IH
H
I
E
:"_{ÂÆÈÇ};
:"_È¼É ;

H
Í
&_¼Ìá
ìÜØß×æ
1ÛÛÛ.
&
(16)
So,
1.7
=
10
×
l1
+
4_+/10
4_1%2
p
×
4_%5:ABB
;
×
+_%%(I=T
)
where
• I_CC(max)is 80 A
• R_CS(eff) is 0.244 mΩ
• R_OCP is 24 kΩ
(17)
Solving, R_IMON = 169 kΩ. R_IMON is connected from IMON pin to OCP-I pin.
28
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