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參數(shù)資料
| 型號： | LB1976 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | DC Fan Motor Driver |
| 中文描述： | 直流風(fēng)扇馬達驅(qū)動器 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 91K |
| 代理商： | LB1976 |
Power Supply Stabilizing Capacitors
If the V
CC
line fluctuates drastically, the low-voltage protection circuit may be activated by mistake, or other
malfunctions may occur. The V
CC
line must therefore be stabilized by connecting a capacitor of at least several μF
between V
CC
and GND. Because a large switching current flows in the V
M
line, wiring inductance and other factors can
lead to V
M
voltage fluctuations. As the GND line also fluctuates, the V
M
line must be stabilized by connecting a
capacitor of at least several μF between V
M
and GND, to prevent exceeding V
M
max or other problems. Especially when
long wiring runs (V
M
, V
CC
, GND) are used, sufficient capacitance should be provided to ensure power supply stability.
V
CREF
Pin, V
COUT
Pin
These pins are always used in the Open condition. If chattering occurs in the PWM switching output, connect a capacitor
(about 0.1 μF) between V
CREF
and ground or between V
COUT
and GND.
IC Heat Dissipation Fins
A heat sink may be mounted to the heat dissipation fins of this IC, but it may not be connected to GND. The sink should
be electrically open.
Sample calculation for internal power dissipation (approximate)
The calculation assumes the following parameters:
V
CC
= 5 V
V
M
= 30 V
Source-side output transistor ON duty cycle 80% (PWM control)
Output current I
O
= 1 A (RF pin average current)
I
CC
power dissipation P1
P1 = V
CC
×
I
CC
= 5 V
×
14 mA = 0.07 W
Output drive current power dissipation P2
P2 = V
M
×
11 mA = 30 V
×
11 mA = 0.33 W
Source-side output transistor power dissipation P3
P3 = V
O
(source)
×
I
O
×
Duty (on) = 0.9 V
×
1 A
×
0.8 = 0.72 W
Sink-side output transistor power dissipation P4
P4 = V
O
(sink)
×
I
O
= 1.1 V
×
1 A = 1.10 W
Total internal power dissipation P
P = P1 + P2 + P3 + P4 = 2.22 W
IC Temperature Rise Measurement
Because the chip temperature of the IC cannot be measured directly, measurement according to one of the following
procedures should always be carried out.
Thermocouple measurement
A thermocouple element is mounted to the IC heat dissipation fin. This measurement method is easy to implement, but
it will be subject to measurement errors if the temperature is not stable.
Measurement using internal diode characteristics of IC
This is the recommended measurement method. It makes use of the parasitic diode incorporated in the IC between FG1
and GND. Set FG1 to High and measure the voltage V
F
of the parasitic diode to calculate the temperature.
(Sanyo data: for I
F
= –1 mA, V
F
temperature characteristics are about –2 mV/°C)
NC Pins
Because NC pins are electrically open, they may be used for wiring purpose etc.
No. 6088-11/12
LB1976
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| LB1980H | Three-Phase Brushless Motor Driver for VCR Capstan Motors |
| LB1980 | 3-Phase Brushless Motor Driver for VCR Capstan Motors |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LB1976_08 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Fan Motor 3-phase Brushless Motor Driver |
| LB1976-E | 功能描述:馬達/運動/點火控制器和驅(qū)動器 FAN MOTOR 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 |
| LB1978 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos |
| LB1978V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos |
| LB-198 | 制造商:Ideal Industries Inc 功能描述: 制造商:Ideal Industries Inc 功能描述:GRIPPER-SET C/STM .159/GRTPD |
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