STEVAL-ISA025V1 STMicroelectronics, STEVAL-ISA025V1 Datasheet - Page 14
![EVAL BOARD 30A 400KHZ L6730](/photos/9/13/91327/steval-isa025v1_sml.jpg)
STEVAL-ISA025V1
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STEVAL-ISA025V1
Manufacturer:
STMicroelectronics
Quantity:
1
Device description
5
5.1
14/52
Device description
Oscillator
The switching frequency is internally fixed to 400 kHz. The internal oscillator generates the
triangular waveform for the PWM charging and discharging an internal capacitor (F
kHz). This current can be varied using an external resistor (R
and GND or V
maintained at fixed voltage (typ. 1.2 V), the frequency is increased (or decreased)
proportionally to the current sunk (sourced) from (into) the pin. In particular by connecting
R
following relationship:
Connecting R
to the following relationship:
Switching frequency variation vs. R
Figure 4.
T
versus GND the frequency is increased (current is sunk from the pin), according to the
Switching frequency variation versus RT
1500
1400
1300
1200
1100
1000
T
CCDR
900
800
700
600
500
400
300
200
100
to V
0
CCDR
in order to change the switching frequency. Since the OSC pin is
Rosc connected to GND
100
reduces the frequency (current is sourced into the pin), according
Fsw
Fsw
200
Doc ID 11938 Rev 3
=
=
400
400
T
300
is shown in
KHz
KHz
+
−
400
Rosc (KOHM)
R
Rosc connected to Vccdr
R
. 9
. 3
OSC
OSC
88
01
(
500
(
Figure
⋅
⋅
K
10
K
10
Ω
Ω
6
7
)
)
600
4.
(1)
(2)
T
700
) connected between OSC pin
800
900 1000
L6730 - L6730B
SW
= 400