L6728H STMicroelectronics, L6728H Datasheet - Page 13
![Voltage Mode PWM Controllers Sgl Output 300 KHz DFN-10](/photos/36/39/363959/dfn-10_sml.jpg)
L6728H
Manufacturer Part Number
L6728H
Description
Voltage Mode PWM Controllers Sgl Output 300 KHz DFN-10
Manufacturer
STMicroelectronics
Datasheet
1.L6728H.pdf
(32 pages)
Specifications of L6728H
Number Of Outputs
Single Output
Switching Frequency
300 KHz
Operating Supply Voltage
5 V to 12 V
Supply Current
6 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Package / Case
DFN-10
Mounting Style
SMD/SMT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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L6728H
8.1
Over current threshold setting
L6728H allows to easily program a 1
550 mV, simply by adding a resistor (R
will be automatically set accordingly.
During a short period of time (about 5 ms) following VCC rising over UVLO threshold, an
internal 10 µA current (I
across R
level over current threshold. The OC setting procedure overall time length is about 5 ms.
Connecting a R
threshold will be:
the programmed 2
R
In case R
values: an internal safety clamp on LGATE is triggered as soon as LGATE voltage reaches
600 mV, setting the maximum threshold and suddenly ending OC setting phase.
I
I
OCth1
OCth2
OCSET
values range from 5 kΩ to 55 kΩ.
=
=
OCSET
OCSET
I
------------------------------------------- -
1.5
OCSET
. This voltage drop will be sampled and internally held by the device as 1
OCSET
⋅
is not connected, the device sets the OCP thresholds to the maximum
I
------------------------------------------- -
R
nd
OCSET
dsON
⋅
level threshold will be:
R
resistor between LGATE and GND, the programmed 1
OCSET
R
OCSET
dsON
⋅
R
) is sourced from LGATE pin, determining a voltage drop
OCSET
Doc ID 15725 Rev 1
st
OCSET
level over current threshold ranging from 50 mV to
) between LGATE and GND. 2
Over current protection
nd
st
level threshold
level
13/32
st