TS1110 Electronic Circuit Breaker and TS1107 Current Limiter User s Guide The TS1110 combines a very low power bidirectional current-sense amplifier (CSA) with KEY FEATURES a circuit breaker feature. The circuit breaker feature is supplied within the TS1110 as an FET control that drives the gate drive of an external P-channel MOSFET, disconnecting R : 50 m 0.5% SENSE the load from the power supply. The TS1110 provides a comparator that can be used for current limit detection with a latch-capable output. A digital SIGN output that indicates External Circuit Breaker PMOS Included the direction of current flow depending on the external connections to the RS+ and RS Adjustable Reference for Current Limiter input terminals is also provided. The TS1110 requires a very low 0.68 A CSA and 1.16 Compatible for Both Gain Options A VDD supply current while combining a 150 V(MAX) input offset voltage with a 0.6% 20 V/V gain error (MAX) for high-precision current measurements. The TS1110 provides a buf- 200 V/V fered CSA output, which can be connected with an RC Filter to reduce noise. ORDERING INFORMATION The TS1107 Current Limiter is a subset of the TS1110 Electronic Circuit Breaker and provides the same functionality minus the load disconnect feature. The TS1107 com- TS1110-20DB bines the very low power bidirectional current-sense amplifier (CSA) with a latch-capable TS1110-200DB current limiter comparator featuring an adjustable current threshold. The TS1107s CSA TS1107-20DB buffered output plus the current limiter comparator require a very low nominal supply cur- rent of 1.15 A. TS1107-200DB silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 TS1110 Electronic Circuit Breaker and TS1107 Current Limiter User s Guide TS1110-EVB Description 1. TS1110-EVB Description The TS1110 Evaluation Board is intended for evaluating the circuit breaker feature of the TS1110. The evaluation board includes a variable reference scheme so that the threshold for the current limit comparator can be adjusted. The jumper, JP1, can be connected so that the included potentiometer can be used to adjust the threshold. A P-channel MOSFET is included, enabling the circuit breaker feature. When CLATCH is tied HIGH, the current limit comparators output, COUT, indicates when the load has exceeded the current limit threshold and has thus been disconnected from the power supply. The Quick Start Procedure details two different load connec- tions. The first load connection corresponds to a load under the current limiters threshold, while the second load connection results in the current limiters output enabling the circuit breaker. Table 1.1. Component List Designation Quantity Description U1 1 TS1110-20, TS1110-200 U2 1 DMP2066LSN-7 RS1 1 50 m 0.5%, 1/2 W (1206) C1, C6 2 1 F 10%, 10 V (0603) C2, C7, C9, C10 4 0.1 F 10%, 10 V (0603) C5 1 0.47 F 10%, 10 V (0603) C8 1 1 nF 10%, 25 V (0603) R1 1 4.02 k 1%, 1/16 W (0603) R3 1 1 M 1%, 1/16 W (0603) R4, R5, R6 3 2 M 1%, 1/10 W (0603) R7 1 0 , 1 A (0603) J1, J2, J3, J4, J5, J6, J7 7 Header 1x1 JP1, JP3 2 Header 1x3 JP4, JP6, JP7, JP8, JP9, JP10, JP11, 8 Jumper JP12 JS1, JS4 2 Jumper Shunt silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 1