SLVSFE3B November   2020  – May 2021

PRODUCTION DATA

1. Features
2. Applications
3. Description
4. Revision History
5. Device Comparison Table
6. Pin Configuration and Functions
7. Specifications
8. Detailed Description
1. 8.1 Overview
2. 8.2 Functional Block Diagram
3. 8.3 Feature Description
4. 8.4 Device Functional Modes
9. Application and Implementation
10. 10Power Supply Recommendations
11. 11Layout
12. 12Device and Documentation Support
13. 13Mechanical, Packaging, and Orderable Information

• DDF|8

#### 8.3.5.1 Supply Sensing with VSNS For Loop Power Mode (TPS26610)

For the TPS26610 device, the set-point for transition to loop power mode can be set by connecting resistors (R1, R2) from +Vs pin to VSNS pin and GND pin as shown in Figure 8-15. The set-point can be calculated as per Table 8-1. It is recommended to use resistors R1 and R2 for supply sensing when voltage across burden resistor (ILOOP × RBurden) is more than 1.8 V. If VSNS is left open or floating, TPS26610 device transitions to loop power mode when +Vs is less than 1.8 V.

Table 8-1 Supply Sensing with VSNS for Loop Power Mode
Device Power Mode +Vs Voltage
±Vs Supplies +Vs ≥ V(SNSR) × (R1 + R2)/R2(1)
Loop Power +Vs ≤ V(SNSF) × (R1 + R2)/R2(1)(2)
Use (R1 + R2) ≤ (+Vs)/(45 μA). For V(SNSR) and V(SNSF) values, see Electrical Characteristics
Keep V(SNSF) × (R1 + R2)/R2 > (ILOOP × RBurden)
Figure 8-15 Supply Sensing with VSNS
 +Vs = 15 V, –Vs = –15 V, ROUT = 250 Ω, MODE = GND
Figure 8-16 Transition to Loop Power with R1 = 47 kΩ and R2 = 6.8 kΩ for Supply Sensing
 +Vs = 15 V, –Vs = –15 V, ROUT = 250 Ω, MODE = GND
Figure 8-17 Transition to ± Vs Supplies Power with R1 = 47 kΩ and R2 = 6.8 kΩ for supply Sensing