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參數(shù)資料
| 型號： | tle 5209 |
| 廠商： | SIEMENS AG |
| 英文描述： | H-Bridge for DC-Motor Applications(H橋直流電機(jī)驅(qū)動器) |
| 中文描述： | H型直流電橋電機(jī)應(yīng)用（高橋直流電機(jī)驅(qū)動器） |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 208K |
| 代理商： | TLE 5209 |
TLE 5209 GP
Circuit Description
Data Sheet
5
1999-12-01
2
Circuit Description
2.1
Input Circuit
The control inputs DIR and PWM consist of TTL/CMOS-compatible schmitt-triggers with
hysteresis. Buffer amplifiers are driven by this stages. Operation modes forward (CW),
reverse (CCW) and brake are invoked by these two inputs. If the inputs are not
connected, then the load between OUT1 and OUT2 is braked. (both highside switches
ON). There’s no need for synchronization of the input signals DIR and PWM.
2.2
Output Stages
The output stages consist of a DMOS H-bridge built by two highside switches and two
lowside switches. Integrated circuits protect the outputs against overcurrent and
overtemperature if there is a short-circuit to ground (SCG) or to the supply voltage (SCB)
or short of the load (SCL).
Positive and negative voltage spikes, which occur when switching inductive loads, are
limited by integrated freewheeling diodes. A monitoring circuit for each output transistor
detects whether the particular transistor is active and in this case prevents the
corresponding source transistor (sink transistor) from conducting in sink operation
(source operation). Therefore no crossover currents can occur.
2.3
Input Logic Truth Table
Table 1
DIR
L
L
H
H
Functional Truth Table
PWM
OUT1
L
H
H
H
L
H
H
L
OUT2 Comments
H
Brake; both highside transistors switched ON.
L
Motor turns clockwise.
H
Brake; both highside transistors are turned ON.
H
Motor turns counterclockwise.
Table 2
Symbol
L
Notes for Output Stage
Value
Low side transistor is turned-ON.
High side transistor is turned-OFF.
High side transistor is turned-ON.
Low side transistor is turned-OFF.
H
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