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參數(shù)資料
| 型號： | TB6549P |
| 廠商： | Toshiba Corporation |
| 英文描述： | Full-Bridge Driver IC for DC motor |
| 中文描述： | 全橋直流馬達(dá)驅(qū)動IC |
| 文件頁數(shù)： | 9/18頁 |
| 文件大?。?/td> | 295K |
| 代理商： | TB6549P |
TB6549F/P
2002-08-30
9
6. V
CC
Power Supply Section
The V
CC
power supply delivers a voltage to the output circuit, charge pump circuit, and internal 5-V
circuit.
The operating voltage range is shown below.
V
CC (opr.)
=
10 to 27 V
This IC has a power monitoring function for preventing an output malfunction on power-up. However,
Toshiba recommends that IN1, IN2, and SB be set to the Low level at power-on.
7. GND Sections
This IC includes two separate GND sections: S-GND for controlling and P-GND for outputting. Be sure
to short- circuit these two GNDs as close to TB6549 as possible.
8. Power Monitoring Circuit
This circuit turns the output OFF when V
reg
becomes 3.0 V (design target value) or less. At this time,
V
CC
=
4.6 V (typ.)
With a hysteresis of 0.3 V (design target value), the output turns back ON when V
reg
exceeds 3.3 V
(design target value) after this circuit starts operating.
9. Thermal Shutdown (T
SD
) Circuit
This IC includes a thermal shutdown circuit which turns the output OFF when the junction temperature
(Tj) exceeds 160°C (typ.). The output turns back ON automatically. The thermal hysteresis is 20°C.
T
SD
=
160°C (design target value)
T
SD
=
20°C (design target value)
10. Overcurrent Detection (I
SD
) Circuit
This IC includes a circuit which detects a current flowing through the output power transistors. The
current limit is set to 5 A (typ.). The circuit detects a current flowing through each of the four output power
transistors. If the current in any one output power transistor exceeds the set limit, this circuit turns all the
outputs OFF.
This circuit includes a timer which causes the outputs to be OFF for 50
μ
s (typ.) after detection of an
overcurrent and then turn back ON automatically. If the overcurrent continues to flow, this ON-OFF
operation is repeated. Note that to prevent a malfunction due to a glitch, an insensitive period of 10
μ
s
(typ.) is provided.
The set limit is 5 A (typ.) as a design target value. The distributions shown below exist because of the
variations in thermal characteristics of different ICs. These distributions should be fully considered in the
motor torque design.
Also, output peak current should be less than 3 A because of the variations below,
Detected current: Approximately from 3.5 to 6.5 A
I
LIM
50
μ
s
(typ.)
0
10
μ
s
(typ.)
Insensitive period
50
μ
s
(typ.)
10
μ
s
(typ.)
Output Current
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| TB6549PG(O) | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 30V PWR Supply 3.5A Full Bridge DRVR PWM RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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