SI3200-BS Silicon Laboratories Inc, SI3200-BS Datasheet
SI3200-BS
Specifications of SI3200-BS
Available stocks
Related parts for SI3200-BS
SI3200-BS Summary of contents
Page 1
... Si3200 Introduction This application note presents a method of offloading power dissipation from the Si3200 linefeed device and onto either an external linear regulator or an external resistor. A design method to select the optimal voltage drop across the external power offload circuit based upon system requirements is also presented. Once the ...
Page 2
... VBATH VBATH 5 5 Si3200 0.1uF 0.1uF VBHI = -56Vdc Resistor Offload Circuit Table 1. System Requirements Symbol T a (max) I lim I bias (max VBHI + Rev. 0.1 40.2k 9 Battery Select Circuit Si3200 Channel 1 Units ° Ω feet/meters Ω/foot or Ω/meter Volts Volts ...
Page 3
... Actually desired to have d(max) P under P Si3200 2 × × modified to include a factor to scale LIM provide margin, resulting in Equation 5. For example, let k = 0.80 so that power dissipation in the Si3200 will d(max) Rev. 0.1 AN91 x L term in Equation 2 vanishes resulting × × ...
Page 4
... The offload circuit (resistor or linear regulator) is not electrically required to be placed close to pin 6 (VBATL) of the Si3200 and should therefore be placed up to two inches (approximately 5 cm) away from the Si3200 device, thus, physically separating components that are dissipating appreciable power. ...
Page 5
... The bundled Excel file provides a very useful tool for analyzing the power dissipation of the Si3200 as a function of loop length and other user-entered parameters. The user enters the desired values for the various parameters at the top of the worksheet and the Rev ...
Page 6
... AN91 worksheet calculates and displays the power limit for the Si3200 and the power dissipated in the Si3200 as a function of loop length. The worksheet also takes care of calculating the battery switching voltage threshold between VBLO and VBHI so that the displayed power dissipation takes into consideration which is the applicable battery supply (VBLO or VBHI), depending on loop length ...
Page 7
... BATHLPF = 2 800) = 0xA10 1 d(max) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 71.4 °C/W. ja Figure 3. Si3200 Power Calculation (example) = (150 °C – 85 °C) Rev. 0.1 AN91 and verifying °C 350 °C. The d(max which yields (max) = 150 ° DEC2HEX ( (32V/0.628 V) ...
Page 8
... Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap- plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories, Silicon Labs, ISOmodem, and ISOcap are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. ...