L6919E View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6919E' PDF : 33 Pages View PDF
L6919E
PIN FUNCTION
N
Name
Description
1
LGATE1 Channel 1 LS driver output.
A little series resistor helps in reducing device-dissipated power.
2
VCCDR LS drivers supply: it can be varied from 5V to 12V buses.
Filter locally with at least 1µF ceramic cap vs. PGND.
3
PHASE1 Channel 1 HS driver return path. It must be connected to the HS1 mosfet source and provides
the return path for the HS driver of channel 1.
4
UGATE1 Channel 1 HS driver output.
A little series resistor helps in reducing device-dissipated power.
5
BOOT1 Channel 1 HS driver supply. This pin supplies the relative high side driver.
Connect through a capacitor (100nF typ.) to the PHASE1 pin and through a diode to VCC
(cathode vs. boot).
6
VCC Device supply voltage. The operative supply voltage is 12V ±10%.
Filter with 1µF (Typ.) capacitor vs. GND.
7
GND All the internal references are referred to this pin. Connect it to the PCB signal ground.
8
COMP This pin is connected to the error amplifier output and is used to compensate the control
feedback loop.
9
FB
This pin is connected to the error amplifier inverting input and is used to compensate the
voltage control feedback loop.
A current proportional to the sum of the current sensed in both channel is sourced from this pin
(50µA at full load, 70µA at the Constant Current threshold). Connecting a resistor between this
pin and VSEN pin allows programming the droop effect.
10
VSEN Manages Over&Under-voltage conditions and the PGOOD signal. It is internally connected with
the output of the Remote Sense Buffer for Remote Sense of the regulated voltage.
If no Remote Sense is implemented, connect it directly to the regulated voltage in order to
manage OVP, UVP and PGOOD.
Connecting 1nF capacitor max vs. SGND can help in reducing noise injection.
11
FBR Remote sense buffer non-inverting input. It has to be connected to the positive side of the load
to perform a remote sense.
If no remote sense is implemented, connect directly to the output voltage (in this case connect
also the VSEN pin directly to the output regulated voltage).
12
FBG Remote sense buffer inverting input. It has to be connected to the negative side of the load to
perform a remote sense.
Pull-down to ground if no remote sense is implemented.
13
ISEN1 Channel 1 current sense pin. The output current may be sensed across a sense resistor or
across the low-side mosfet RdsON. This pin has to be connected to the low-side mosfet drain or
to the sense resistor through a resistor Rg.
The net connecting the pin to the sense point must be routed as close as possible to the
PGNDS net in order to couple in common mode any picked-up noise.
14 PGNDS1 Channel 1 Power Ground sense pin. The net connecting the pin to the sense point must be
routed as close as possible to the ISEN1 net in order to couple in common mode any picked-up
noise.
15 PGNDS2 Channel 2 Power Ground sense pin. The net connecting the pin to the sense point must be
routed as close as possible to the ISEN2 net in order to couple in common mode any picked-up
noise.
16
ISEN2 Channel 2 current sense pin. The output current may be sensed across a sense resistor or
across the low-side mosfet RdsON. This pin has to be connected to the low-side mosfet drain or
to the sense resistor through a resistor Rg.
The net connecting the pin to the sense point must be routed as close as possible to the
PGNDS net in order to couple in common mode any picked-up noise.
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