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| INA203-Q1_15 Datasheet, PDF (17/24 Pages) Texas Instruments – Unidirectional Measurement Current-Shunt Monitor with Dual Comparators | |||
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INA203-Q1
www.ti.com
SBOS539 â DECEMBER 2010
Raychem
Polyswitch
Load
< 18V
Battery
+5V Supply
VS+
OUT
CMP1 IN-
CMP1 IN+
CMP2 IN+
CMP2 IN-
GND
CBYPASS
0.01mF
INA203-Q1
x20
1.2V REF
VIN+
VIN-
1.2V REF OUT
CMP1 OUT
CMP2 OUT
CMP2 DELAY
CMP1 RESET
Reset
3.3kW
Pull-Up
Resistors
Overlimit(1)
Warning(1)
Latch
Optional
CDELAY
0.01mF
NOTE: (1) Warning at half current (with optional delay). Overlimit latches when Polyswitch opens.
Figure 38. Polyswitch Warning and Fault Detection Circuit
R5
100kW
R6
6.04kW
R3
14kW
R4
6.04kW
VS+
OUT
CMP1 IN-
CMP1 IN+
CMP2 IN+
CMP2 IN-
CBYPASS
0.01mF
GND
RSHUNT
0.02W
R1
100kW
R7
1kW
Load
Q2
NDS8434A
+5V Supply
INA203-Q1
x20
1.2V REF
VIN+
VIN-
1.2V REF OUT
CMP1 OUT
CMP2 OUT
CMP2 DELAY
CMP1 RESET
Reset
Latch
Q1
2N3904
R2
1kW
Figure 39. Lead-Acid Battery Protection Circuit
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): INA203-Q1
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