STEVAL-ISA024V1 STMicroelectronics, STEVAL-ISA024V1 Datasheet - Page 15
![EVAL BOARD 20A 250KHZ L6725](/photos/9/14/91491/steval-isa024v1_sml.jpg)
STEVAL-ISA024V1
Manufacturer Part Number
STEVAL-ISA024V1
Description
EVAL BOARD 20A 250KHZ L6725
Manufacturer
STMicroelectronics
Type
DC/DC Switching Converters, Regulators & Controllersr
Specifications of STEVAL-ISA024V1
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
3.3V
Current - Output
20A
Voltage - Input
4.5 ~ 14V
Regulator Topology
Buck
Frequency - Switching
250kHz
Board Type
Fully Populated
Utilized Ic / Part
L6725
Input Voltage
4.5 V to 14 V
Output Voltage
3.3 V
Product
Power Management Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
L6725
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
L6725
Other names
497-5867
L6725 - L6725A
5.9
Figure 9.
5.10
Hiccup mode
During the soft-start phase the OCP provides a constant-current-protection. If during the T
the OCH comparator triggers an over current the high-side MOSFET(s) is immediately turned
OFF (after the masking time and the internal delay) and returned on at the next pwm cycle. The
limit of this protection is that the T
because during the masking time the peak-current-protection is disabled. In case of very hard
short circuit, even with this short T
is very helpful in this case to limit the current. If during the off-time the OCL comparator triggers
an over current, the high-side MOSFET(s) is not turned on until the current is over the valley-
current-limit. This implies that, if it is necessary, some pulses of the high-side MOSFET(s) will
be skipped, guaranteeing a maximum current due to the following formula:
Thermal shutdown
When the junction temperature reaches 150°C ±10°C the device enters in thermal shutdown.
Both MOSFETs are turned OFF and the soft-start capacitor is rapidly discharged with an
internal switch. The device does not restart until the junction temperature goes down to 120°C
and, in any case, until the voltage at the soft-start pin reaches 500mV.
Constant current and Hiccup Mode during an OCP.
I
MAX
=
I
VALLEY
ON
ON
+
cannot be less than masking time plus propagation delay,
, the current could escalate. The valley-current-protection
Vin
−
L
Vout
⋅
T
ON
,
MIN
(1)
VSS
Device description
VCOMP
I
L
15/32
ON