EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 17
![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
L6730C - L6730D
Figure 8.
The reference of the error amplifier is clamped with this voltage (Vss) until it reaches the
programmed value: 0.6V or 1.2V. During the soft-start phase the converter works in closed
loop. The L6730C can only source current during the soft-start phase in order to manage the
prebias start-up applications. The L6730D can always sink current and so it can be used to
supply the DDR Memory termination BUS. If an over current is detected during the soft-start
phase, the device provides a constant-current-protection. In this way, in case of short soft-start
time and/or small inductor value and/or high output capacitors value and thus, in case of high
ripple current during the soft-start, the converter can start-up in any case, limiting the current
(see section 4.5 Monitoring and protections) but not entering in HICCUP mode. The soft-start
phase ends when Vss reaches 3.5V. After that the over-current-protection triggers the HICCUP
mode (L6730C). With the L6730D there is the possibility to set the HICCUP mode or the
constant current mode after the soft-start acting on the multifunction pin CC/O/U. With the
L6730 the low-side MOSFET(s) management after soft-start phase depends on the S/O/U pin
state (see related section). If the sink-mode is enabled the converter can sink current after soft-
start (see figure 9) while, if the sink-mode is disabled the converter never sinks current (see
figure 10)..
Sink-mode enabled: Inductor current during and after soft-start (L6730C).
V
V
V
I
OUT
L
SS
CC
Device description
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