TDE1708DFT
Intelligent power switch
Features
■Low side or high side switch configuration
■6 V to 48 V supply voltage range
■Overload and short circuit protections
■Internal voltage clamping
■Supply and output reversal protection
■Thermal shutdown
■GND and VS open wire protection
■Adjustable delay at switch on
■Indicator status led driver
■+5 V regulated aux. voltage
■High burst immunity
Description
The TDE1708DFT is an integrated power switch with up to 48 V power supply capability. Two output configurations are possible:
Load to GND (high side mode)
Load to VS (low side mode)
Especially dedicated to proximity detectors, its internal +5 V supply can be used to supply external circuits (See also AN495).
DFN (4x4)
A signal is internally generated to block the In signal, and prevent activation of the output switch, as long as an abnormal condition is detected. The power-on transition, as well as the chip over temperature and the output overcurrent, concur to the generation of such signal. A minimum delay of 25 ms (Typ. value) is added to the trailing edge of such signal to ensure that a stable normal situation is present when the signal disappears. The delay (of the disappearance of the block signal; no delay at its on set) can be further increased connecting a capacitor between pin3 and ground. It can drive resistive or inductive loads.
Order code |
Temp. range, °C |
Package |
Packing |
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TDE1708DFT |
-25 °C to +85 °C |
DFN (4x4) |
Tape and reel |
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February 2009 |
Rev 4 |
1/14 |
www.st.com
Contents |
TDE1708DFT |
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Contents
1 |
Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 3 |
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2 |
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5 |
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2.1 |
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5 |
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2.2 |
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5 |
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2.3 |
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6 |
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2.4 |
Dynamic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
3 |
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
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3.1 |
Adjustable input hysteresis circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
9 |
4 |
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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4.1 |
Foot print recommended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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4.2 |
DFN (4x4) mechanical data and package dimensions . . . . . . . . . . . . . . . |
11 |
5 |
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
13 |
2/14
TDE1708DFT |
Block and pin connection diagrams |
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3/14
Block and pin connection diagrams |
TDE1708DFT |
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Figure 2. Pin connection diagram (top view) |
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Table 2. |
Pin functions |
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Pin No |
Function |
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1 |
Led driver |
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2 |
High side output |
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3 |
Delay capacitance source |
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4 |
Ground |
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5 |
Input |
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6 |
Reg. voltage source |
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7 |
Supply voltage |
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8 |
Low side output |
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Note: |
Lead frame can be connected to ground. |
4/14
TDE1708DFT |
Electrical specifications |
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2.1Thermal data
Table 3. |
Thermal data |
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Symbol |
Description |
Value |
Unit |
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RthJA |
Thermal resistance junction-ambient. (max) |
32(1) |
°C/W |
RthJC |
Thermal resistance junction-case. (max) |
1.2 |
°C/W |
1. Soldered to a 4 layer board with 4 vias in the pad.
2.2Absolute maximum ratings
Table 4. |
Absolute maximum ratings |
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Symbol |
Parameter |
Value |
Unit |
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VS |
Supply voltage |
50 |
V |
VS |
Supply reverse voltage |
50 |
V |
Io |
Output current |
internally limited |
A |
Vreg |
Regulated voltage pin |
0 to 7 |
V |
Vdelay |
Delay cap. source pin |
0 to 5 |
V |
Vo |
Output dif. voltage |
55 |
V |
Vi |
Input voltage |
-10 to 50 |
V |
TJ |
Junction operating temperature |
Internally limited |
°C |
Tstg |
Storage temperature range |
-55 to 150 |
°C |
Ptot |
Power dissipation |
internally limited |
mW |
Ei |
Energy inductive load |
100 |
mJ |
5/14