TDE3247
Interface circuit (relay and lamp driver)
Features
■High output current
■Adjustable short-circuit protection to ground
■Internal thermal protection with hysteresis to avoid the intermediate output levels
■Large supply voltage range: 8 to 30V
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Short-circuit protection to VCC |
SO-14 |
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Open ground protection |
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Description
The TDE3247 is a monolithic amplifier designed for high current and high voltage applications, specifically to drive lamps, relays and stepping motors.
The Device is essentialy blow-out proof. Current limiting is available to limit the peak output current to a safe value, the adjustment only required an external resistor.
In addition, thermal shut-down is provided to keep the IC from overheating.
If external dissipation becomes too high, the driver will shut-down to prevent excessive heating.
The output is also protected against short-circuit with the positive power supply.
The device operates over a wide range of supply voltage from standard ±15V operational amplifier supplies down to the single 12V or 24V used for industrial electronic systems.
Order codes
Part number |
Package |
Packaging |
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TDE3247FP |
SO-14 |
Tube |
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TDE3247FPT |
SO-14 |
Tape & Reel |
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June 2006 |
Rev 2 |
1/15 |
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www.st.com |
Contents |
TDE3247 |
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Contents
1 |
Schematic diagram and pin connections . . . . . . . . . . . . . . . . . . . . . . . |
. 3 |
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2 |
Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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3 |
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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3.1 |
Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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4 |
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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5 |
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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6 |
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
14 |
2/15
TDE3247 |
Schematic diagram and pin connections |
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Figure 1. Schematic diagram
Figure 2. Pin connections
3/15
Electrical ratings |
TDE3247 |
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Table 1. |
Absolute maximum ratings |
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Symbol |
Parameter |
Value |
Unit |
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VCC |
Supply Voltage |
36 |
V |
VO |
Differential Input Voltage |
36 |
V |
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VI |
Input Voltage |
36 |
V |
IO |
Output Current |
300 |
mA |
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PTOT |
Power Dissipation |
Internally limited |
W |
Toper |
Ambient Temperature Range |
–25 to 85 |
° C |
TSTG |
Storage Temperature Range |
–65 to +150 |
° C |
Table 2. |
Thermal data |
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Junction-ceramic Substrate |
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Rth |
(case glued to substrate) |
90 |
°C/W |
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For SO-14 |
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Junction-ceramic Substrate |
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Rth |
(case glued to substrate, substrate |
65 |
°C/W |
temperature maintened constant) |
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For SO-14 |
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4/15
TDE3247 Electrical characteristics
3 |
Electrical characteristics |
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(-25°C ≤TA 85°C, 8V ≤VCC ≤30V, IO ≤150mA, TJ ≤150°C, unless otherwise specified) Note: 1 |
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Table 3. |
Electrical characteristics |
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Symbol |
Parameter |
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VIO |
Input Offset Voltage |
Note 2 |
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2 |
50 |
mV |
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IIB |
Input Bias Current |
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0.1 |
1.5 |
µA |
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VCC = 24V, IO = 0A, |
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ICC |
Supply Current |
Tamb = 25°C |
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High Level |
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4 |
10 |
mA |
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Low Level |
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2 |
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mA |
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VCM |
Common Mode Input |
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2 |
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VCC-2 |
V |
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Voltage Range |
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ISC |
Short-circuit Current |
VCC = 24V, Tamb = 25°C |
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250 |
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mA |
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RSC = 3.3Ω |
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Output Saturation Voltage |
(VI+- VI-) ≤50mV |
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V |
CC |
- V |
I = 150mA, R |
= 0 |
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1.2 |
1.8 |
V |
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O |
(Output High) |
O |
SC |
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TJ = 25°C |
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Output Leakage Current |
VO = 0V, VCC = 24V |
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IOL |
TJ = 25°C |
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1 |
100 |
µA |
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(Output Low) |
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TJ = 85°C |
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500 |
µA |
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IOS |
Minimum Short-current |
Tamb = 25°C, VCC = 24V |
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50 |
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mA |
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Output Current |
RSC = ∞ |
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Note: 1 For operating at high temperatures, the device must be derated based on a 150°C maximum junction and a junction to ambient thermal resistance of 110°C/W
2The offset voltage given in the maximum value of input voltage required to drive the output voltage within 2V of the ground or the supply voltage.
5/15