TS1108-20ITQ1633 Silicon Labs

TS1108 Data Sheet TS1108 Coulomb Counter: Bidirectional Current Sense Amplifier KEY FEATURES with Integrator + Comparator Coulomb Counting plus Charge Polarity The TS1108 coulomb counter accurately measures battery depletion while also indicat- Adjustable Charge Count Frequency ing the battery charging polarity. The battery discharge current is monitored by a current- External Crystal Oscillator Not Required sense amplifier through an external sense resistor. Utilizing an Integrator and a Compa- Low Supply Current rator plus a Monoshot, the TS1108 voltage-to-frequency converter provides a series of Current Sense Amplifier: 0.68 A 90 s output pulses at COUT which represents an accumulation of coulombs flowing out I : 1.93 A of the battery. The charge count frequency is adjustable by the integration resistor and VDD capacitor. High Side Bidirectional Current Sense Amplifier Applications Wide CSA Input Common Mode Range: +2 Power Management Systems V to +27 V Portable/Battery-Powered Systems Low CSA Input Offset Voltage: 150 V(max) Smart Chargers 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) silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 TS1108 Data Sheet Ordering Information 1. Ordering Information Table 1.1. Ordering Part Numbers Ordering Part Number Description Gain V/V TS1108-20IQT163 Coulomb counter: Bidirectional current sense amplifier with integrator and comparator 20 TS1108-200 IQT1633 Coulomb counter: Bidirectional current sense amplifier with integrator and comparator 200 Note: Adding the suffix T to the part number (e.g. TS1108-200IQT1633T) denotes tape and reel. silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 1