FDMS2380 Fairchild Semiconductor, FDMS2380 Datasheet - Page 6

• Manufacturer Part Number: FDMS2380
• Description: IC SOLENOID DRIVER DUAL 18QFN
• Manufacturer: Fairchild Semiconductor
• Type: Low Sider

Specifications of FDMS2380

• Input Type: Non-Inverting
• Number Of Outputs: 2
• On-state Resistance: 30 mOhm
• Current - Output / Channel: 5A
• Voltage - Supply: 6 V ~ 26 V
• Operating Temperature: -40°C ~ 160°C
• Mounting Type: Surface Mount
• Package / Case: 18-FQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Peak Output: -
• Other names: FDMS2380TR

FDMS2380 Rev. A
Overvoltage (see figure 4) While in the Excitation mode if
the V
V
mode and a protection fault signal on the diagnostic pin
DIAG is generated. This condition is not reset by INA going
low but by the voltage of the V
V
time the device is driven into the Excitation state while the
over-voltage condition exists.
The FDMS2380 is designed with a fast responding over-
voltage circuit that disables the output slope control circuit
which minimizes radiated EMI. However, voltage transitions
on the V
need to be limited to a rise time no faster then 2.2 V/μs
through the use of a power supply bypass capacitor.
Undervoltage (see figure 6) The FDMS2380 will operate
down to a minimum voltage of V
drops below this minimum voltage the device is forced into
the Standby mode. If INA is high during this condition a 2 μs
to 10 μs protection fault pulse is issued on the diagnostic
DIAG pin. In addition, a diagnostic pulse will be generated
each time INA transitions from a low to a high logic level
while remaining in this under-voltage condition.
The FDMS2380 will return to normal operation when V
is 6 volts or greater.
Operational Truth Table
H = High, L = Low, X = Don’t Care
General operation INA and INB are standard logic inputs that control Standby, Excitation, Recirculation, Diagnostics, and
Fast turn-off modes in the FDMS2380.
Conditions
Standby Mode:
Soft Short Test Mode
Excitation Mode: (No protection faults)
Recirculation Mode
Fast Turn-off Mode: V
Alternator Load Dump: V
Thermal Shutdown: T
Current Trip: I
Overvoltage: V
Undervoltage: V
Open Load: I
(Figure 5)
BATT(ov)
BATT(ov)
BATT
BATT
, the FDMS2380 is forced into the Recirculation
level. A protection fault pulse will be issued each
pin rises above the over-voltage threshold,
pin which exceed 30 volts above the battery
OUT
OUT
BATT
BATT
< I
> I
OUT(ol)
> V
OUT(trip)
< V
J
FB
> T
BATT(ov)
< V
BATT(uv)
OUT
J(tsd)
refer to Open Load waveforms
OUT
> V
BATT
BATT(uv)
< V
OUT(cl1)
pin returning below the
OUT(cl1
. If the battery supply
)
BATT
6
INA
L
L
H
H
L
L
H
H
H
H
Diagnostic Functions
Open Load Detect (see figure 5) While INA and INB are
high, if the load current fails to rise above the open load
current level, I
load diagnostic fault will be issued. The diagnostic pin will
be driven low on the falling edge of the INB signal and
remain low until INA is returned to a logic 0 condition. The
open load detect mechanism senses current flowing through
the NDMOS at the falling edge of the INB signal. If an open
load condition exists during the Excitation phase but is
corrected before the INB falling edge the open load
condition would not be detected and the open load
diagnostic fault would not be generated.
of the FDMS2380 and the PDMOS and NDMOS output
transistors will be driven into the operational modes as
commanded by the INA and INB inputs.
If during the detection of the open load condition a protection
fault condition also arises, the open load diagnostics will be
terminated and then after a 2 μs to 10 μs blanking period the
protection diagnostic will be generated.
The open load detection circuit does not alter the operation
-
INB
L
H
H
L
L
X
X
H
H
X
OUT(ol)
-
, before INB transitions low an open
NDMOS
OFF
OFF
ON
OFF
OFF
NDMOS in UIS
operation
OFF
OFF
OFF
OFF
-
www.fairchildsemi.com
PDMOS
OFF
ON
ON
ON
V
to V
NA
ON
ON
ON
OFF
OUT
OUT(cl2)
clamped
-