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參數(shù)資料
| 型號(hào)： | TLE5226G |
| 廠商： | SIEMENS A G |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | Smart Quad Channel Low-Side Switch |
| 中文描述： | 5 A BUF OR INV BASED PRPHL DRVR, PDSO20 |
| 文件頁(yè)數(shù)： | 7/13頁(yè) |
| 文件大?。?/td> | 196K |
| 代理商： | TLE5226G |
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TLE 5226 G
Semiconductor Group
Page
1998-02-04
7
Application Description
This IC is especially designed to drive inductive loads (relays, electromagnetic valves).
Integrated clamp-diodes limit the output voltage when inductive loads are discharged.
Four open-drain logic outputs indicate the status of the integrated ciruit. The following conditions are
monitored and signalled:
- overloading of output (also shorted load to supply) in active mode
- open and shorted load to ground in active and inactive mode
- overtemperature
Circuit Description
Input Circuits
The control and enable inputs, both active high, consist of schmitt triggers with hysteresis. All inputs
are connected with pull-down current sources. Not connected inputs are interpreted as LOW.
In standby mode (STBY = LOW ) the current consumption is greatly reduced. The circuit is active
when STBY = HIGH.
If the standby function is not used, it is allowed to connect the standby pin directly to V
S
.
Switching Stages
The four power outputs consist of DMOS-power transistors with open drains. The output stages are
shorted loads protected throughout the operating range. Integrated clamp-diodes limit voltage
overshoots produced when inductive loads are demagnetized.
Parallel to the DMOS transistors there are internal pull down resistors. They are provided to detect an
open load condition in the off state. They will be disconnected in the standby mode.
Protective Circuits
The outputs are protected against current overload and overtemperature.
There is no protection against reverse polarity of the supply voltage.
Error Detection
The status outputs indicate the switching state under normal conditions (LOW = off; HIGH = on). If an
error occurs, the logic level of the status output is inverted, as listed in the diagnostic table below.
The state of the error detection circuits is directly dependent on the input status.
If current overload or overtemperature occurs, the error condition is stored into an internal register and
the output is shutdown. The reset is done by switching off the corresponding control input.
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