EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 35
![EVAL BOARD FOR L6730XX](/photos/9/30/93060/eval6730_sml.jpg)
EVAL6730
Manufacturer Part Number
EVAL6730
Description
EVAL BOARD FOR L6730XX
Manufacturer
STMicroelectronics
Type
Motor / Motion Controllers & Driversr
Datasheets
1.L6730TR.pdf
(52 pages)
2.L6730DTR.pdf
(50 pages)
3.EVAL6730.pdf
(9 pages)
4.EVAL6732.pdf
(43 pages)
Specifications of EVAL6730
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Power - Output
66W
Voltage - Output
3.3V
Current - Output
20A
Voltage - Input
4.5 ~ 14V
Regulator Topology
Buck
Frequency - Switching
400kHz
Board Type
Fully Populated
Utilized Ic / Part
L6730
Input Voltage
8 V to 52 V
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
L6208
Other names
497-5501
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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
35/52