TDE1890D Datasheet PDF - ST Microelectronics
| Part Number | TDE1890D | |
| Description | 2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH | |
| Manufacturers | ST Microelectronics | |
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TDE1890
® TDE1891
2A HIGH-SIDE DRIVER
INDUSTRIAL INTELLIGENT POWER SWITCH
2A OUTPUT CURRENT
18V TO 35V SUPPLY VOLTAGE RANGE
INTERNAL CURRENT LIMITING
THERMAL SHUTDOWN
OPEN GROUND PROTECTION
INTERNAL NEGATIVE VOLTAGE CLAMPING
TO VS - 50V FOR FAST DEMAGNETIZATION
DIFFERENTIAL INPUTS WITH LARGE COM-
MON MODE RANGE AND THRESHOLD
HYSTERESIS
UNDERVOLTAGELOCKOUT WITH HYSTERESIS
OPEN LOAD DETECTION
TWO DIAGNOSTIC OUTPUTS
OUTPUT STATUS LED DRIVER
DESCRIPTION
The TDE1890/1891 is a monolithic Intelligent
Power Switch in Multipower BCD Technology, for
BLOCK DIAGRAM
MULTIPOWER BCD TECHNOLOGY
MULTIWATT11 MULTIWATT11V PowerSO20
(In line)
ORDERING NUMBERS:
TDE1891L
TDE1890V
TDE1890D
TDE1891V
driving inductive or resistive loads. An internal
Clamping Diode enables the fast demagnetization
of inductive loads.
Diagnostic for CPU feedback and extensive use
of electrical protections make this device ex-
tremely rugged and specially suitable for indus-
trial automation applications.
July 1998
1/12
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TDE1890 - TDE1891
APPLICATION INFORMATION
DEMAGNETIZATION OF INDUCTIVE LOADS
An internal zener diode, limiting the voltage
across the Power MOS to between 50 and 60V
(Vcl), provides safe and fast demagnetization of
inductive loads without external clamping devices.
The maximum energy that can be absorbed from
an inductive load is specified as 1J (at
Tj = 85°C).
To define the maximum switching frequency three
points have to be considered:
1) The total power dissipation is the sum of the
On State Power and of the Demagnetization
Energy multiplied by the frequency.
2) The total energy W dissipated in the device
during a demagnetization cycle (figg. 2, 3) is:
W = Vcl
L
RL
[Io
–
Vcl – Vs
RL
log
1
+
Vs
Vcl – Vs
]
Where:
Vcl = clamp voltage;
L = inductive load;
RL = resistive load;
Vs = supply voltage;
IO = ILOAD
3) In normal conditions the operating Junction
temperature should remain below 125°C.
If the demagnetization energy exceeds the rated
value, an external clamp between output and +VS
must be externally connected (see fig. 5).
The external zener will be chosen with Vzener
value lower than the internal Vcl minimum rated
value and significantly (at least 10V) higher than
the voltage that is externally supplied to pin 10,
i.e. than the supply voltage.
Alternative circuit solutions can be implemented
to divert the demagnetization stress from the
TDE1890/1, if it exceeds 1J. In all cases it is rec-
ommended that at least 10V are available to de-
magnetize the load in the turn-off phase.
A clamping circuit connected between ground and
the output pin is not recommended. An interrup-
tion of the connection between the ground of the
load and the ground of the TDE1890/1 would
leave the TDE1890/1 alone to absorb the full
amount of the demagnetization energy.
Figure 2: Inductive Load Equivalent Circuit
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TDE1890D electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TDE1890D.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
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