TLD5095EL Datasheet, PDF (28/31 Pages) Infineon Technologies AG – DC/DC Boost, Buck-Boost, SEPIC controller

TLD5095EL
Application Information
10.1
Further Application Information
In fixed frequency mode where an external resistor configures the switching frequency the minimum boost inductor
is given by the formula in Figure 23.
• L_MIN = Minimum Inductance Required During Fixed Frequency Operation
• V_BO = Boost Output Voltage
• R_CS = Current Sense Resistor
• f_FREQ = Switching Frequency
L_MIN ≥ _{1----0---6---×}^V---1--B-0--^O-_–---₃^[--V_[---V--^]--_]-^×---_×--R---f-^C-_F---_RS---^[_E--^Ω-_Q----_[]--H-----z---_]
Figure 23 Minimum Inductance Required During Fixed Frequency Operation (B2G configuration)
In synchronization mode where an external clock source configures the switching frequency the minimum boost
inductor is given by the formula in Figure 24.
• L_SYNC = Minimum Inductance Required During Synchronization Operation
• V_BO = Boost Output Voltage
• R_CS = Current Sense Resistor
L_SYNC ≥ _{1----0---6V---×}-^B--1--^O-0--^[-_–--V-₃--_[-^]--V--^×--_]---R-_×---^C--2-^S--5-^[--0^Ω---k--^]-H-----z-
Figure 24 Minimum Inductance Required During Synchronization Operation (B2G configuration)
• For further information you may contact http://www.infineon.com/
Datasheet
28
Rev. 1.1, 2009-12-16