2?A Coulomb Counter Bidirectional

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TS1108 Coulomb Counter: Bidirectional Current Sense Amplifier with Integrator + Comparator

The TS1108 coulomb counter accurately measures battery depletion while also indicating the battery charging polarity. The battery discharge current is monitored by a current-sense amplifier through an external sense resistor. Utilizing an Integrator and a Comparator plus a Monoshot, the TS1108 voltage-to-frequency converter provides a series of 90 μs output pulses at COUT which represents an accumulation of coulombs flowing out of the battery. The charge count frequency is adjustable by the integration resistor and capacitor.

Symmetry Electronics is an authorized Silicon Labs distributor.


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Coulomb Counting plus Charge Polarity
Adjustable Charge Count Frequency
External Crystal Oscillator Not Required
Low Supply Current
Current Sense Amplifier: 0.68 A
IVDD: 1.93 A
High Side Bidirectional Current Sense Amplifier
Wide CSA Input Common Mode Range: +2 V to +27 V
Low CSA Input Offset Voltage: 150 V(max)
Low Gain Error: 1%(max)
Two Gain Options Available:
Gain = 20 V/V : TS1108-20
Gain = 200 V/V : TS1108-200
16-Pin TQFN Packaging (3 mm x 3 mm)

Previously Viewed Products

2?A Coulomb Counter Bidirectional
Part #: TS1108-20ITQ1633
2?A Coulomb Counter Bidirectional