STEVAL-ISA025V1 STMicroelectronics, STEVAL-ISA025V1 Datasheet - Page 35

• Manufacturer Part Number: STEVAL-ISA025V1
• Description: EVAL BOARD 30A 400KHZ L6730
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA025V1

• Design Resources: STEVAL-ISA025V1 Gerber Files STEVAL-ISA025V1 Schematic STEVAL-ISA025V1 Bill of Materials
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 30A
• Voltage - Input: 4.5 ~ 14V
• Regulator Topology: Buck
• Frequency - Switching: 400kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6730
• Input Voltage: 4.5 V to 14 V
• Output Voltage: 3.3 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: L6730
• Kit Application Type: Power Management - Voltage Regulator
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6730
• Other names: 497-5868

L6730 - L6730B
6.4
Compensation network
The loop is based on a voltage mode control
the internal/external reference voltage and scaled by the external resistor divider. The error
amplifier output V
pulse-width modulated (PWM) with an amplitude of V
is filtered by the output filter. The modulator transfer function is the small signal transfer
function of V
L-Cout resonance and a zero at F
Gain of the modulator is simply the input voltage V
voltage: V
Figure 29. Compensation network
The compensation network consists in the internal error amplifier, the impedance networks
Z
provide a closed loop transfer function with the highest 0dB crossing frequency to have
fastest transient response (but always lower than fsw/10) and the highest gain in DC
conditions to minimize the load regulation error. A stable control loop has a gain crossing the
IN
(R3, R4 and C20) and Z
OSC
OUT
.
/V
COMP
COMP
. This function has a double pole at frequency F
is then compared with the oscillator triangular wave to provide a
FB
Doc ID 11938 Rev 3
(R5, C18 and C19). The compensation network has to
Z
ESR
FB
depending on the output capacitor’s ESR. The DC
(Figure
IN
29). The output voltage is regulated to
divided by the peak-to-peak oscillator
IN
at the PHASE node. This waveform
Z
IN
LC
Application details
depending on the
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