This is a design circuit for frequency regulator circuit. This circuit is based on LM5007 for control the operation of the circuit. This is the figure of the circuit;
The LM5007 buck regulator differs in operation from other conventional control methods, such as fixed frequency current-mode, fixed on-time voltage mode, variable on-time, and variable off-time. The LM5007 hysteretic constant frequency control method offers better performance with smaller output capacitance and no loop compensation. The LM5007 is a high voltage IC designed to accept an input voltage of 9V - 75V (80V max). The bootstrap diode and high voltage N-Channel MOSFET buck switch are integrated in the IC, making the LM5007 attractive for applications where board space is at a premium.
The current loop formed by D1, L1, and C2 should be as small as possible. The ground connection from C2 to C1 should be as short and direct as possible. If the internal dissipation of the LM5007 produces excessive junction temperatures during normal operation, good use of the PC board’s ground plane can help considerably to dissipate heat.
[Circuit schematic source: National Semiconductor Notes]
The LM5007 buck regulator differs in operation from other conventional control methods, such as fixed frequency current-mode, fixed on-time voltage mode, variable on-time, and variable off-time. The LM5007 hysteretic constant frequency control method offers better performance with smaller output capacitance and no loop compensation. The LM5007 is a high voltage IC designed to accept an input voltage of 9V - 75V (80V max). The bootstrap diode and high voltage N-Channel MOSFET buck switch are integrated in the IC, making the LM5007 attractive for applications where board space is at a premium.
The current loop formed by D1, L1, and C2 should be as small as possible. The ground connection from C2 to C1 should be as short and direct as possible. If the internal dissipation of the LM5007 produces excessive junction temperatures during normal operation, good use of the PC board’s ground plane can help considerably to dissipate heat.
[Circuit schematic source: National Semiconductor Notes]
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