|
|
PDF LB11961V Data sheet ( Hoja de datos )
| Número de pieza | LB11961V | |
| Descripción | Single-Phase Full-Wave Fan Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LB11961V (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
|
No Preview Available !
Ordering number : EN8794B
LB11961V
Monolithic Digital IC
Single-Phase Full-Wave
Fan Motor Driver
http://onsemi.com
Overview
The LB11961V is a single-phase bipolar drive motor driver that easily implements direct PWM motor drive systems
with excellent efficiency. The LB11961V is optimal for fan motor drive in personal computer power supply systems
and CPU cooling fan systems.
Features
• Single-phase full-wave drive (16V, 1.0A transistors are built in)
• Built-in variable speed function controlled by a thermistor input
The LB11961V can implement quiet, low-vibration variable speed control using externally clocked high side
transistor direct PWM drive.
• Built-in regenerative diode (Di); only requires a minimal number of external components.
• Built-in HB
• Minimum speed setting pin (allows full-speed mode operation at startup)
• Operates in full-speed mode when the thermistor is removed.
• Built-in lock protection and automatic recovery circuits
• FG (speed detection) and RD (lock detection) outputs
• Built-in thermal shutdown circuit
Semiconductor Components Industries, LLC, 2013
May, 2013
92111 SY 20110915-S00002/31407 TI PC 20070206-S0006 No.8794-1/7
1 page  
Application Circuit Example
LB11961V
*2
CM
HB
*7
H IN−
VCC
*3
IN+
6VREG
*6
FG
*5
RD
RMI
*8
OUT1
CP = 100pF
*4
CT = 0.47μF to 1μF
VTH
CPWM
CT
S-GND
OUT2
P-GND
*1
*1.Power supply and ground lines
P-GND is connected to the motor power supply system and S-GND is connected to the control circuit power supply system.
These two systems should be formed from separate lines and the control system external components should be connected to
S-GND.
*2. Regeneration power supply stabilization capacitor
The capacitor CM provides power supply stabilization for both PWM drive and kickback absorption. A capacitor with a value of
over 0.1µF is used for CM. A large capacitor must be used when the coil inductance is large or when the coil resistance is low.
Since this IC adopts a technique in which switching is performed by the high side transistor and regeneration is handled by the low
side transistor, the pattern connecting CM to VM and P-GND must be as wide and as short as possible.
*3.Hall sensor input
Lines that are as short as possible must be used to prevent noise from entering the system. The Hall sensor input circuit consists of
a comparator with hysteresis (20mV). We recommend that the Hall sensor input level be at least three times this hysteresis, i.e. at
least 60mVp-p.
*4.PWM oscillator frequency setting capacitor
If a value of 100pF is used for CP, the oscillator frequency will be f = 25kHz, and this will be the basic frequency of the PWM
signal.
*5.RD output
This is an open collector output. It outputs a low level when the motor is turning and a high level when it is stopped. This pin must
be left open if unused.
*6.FG output
This is an open collector output, and a rotation count detection function can be implemented using this FG output, which
corresponds to the phase switching. This pin must be left open if unused.
*7.HB pin
This pin provides a Hall effect sensor bias constant-voltage output of 1.25V.
*8.RMI pin
Connect this pin to VTH if unused. Even if unused, the IC is set internally to operate at a 10% drive duty at the voltage
corresponding to the lowest speed. (The capacitor is used to set up full-speed mode at startup.)
No.8794-5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB11961V.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LB11961 | Single-Phase Full-Wave Fan Motor Driver |  Sanyo Semicon Device |
| LB11961V | Single-Phase Full-Wave Fan Motor Driver | Sanyo Semicon Device |
| LB11961V | Single-Phase Full-Wave Fan Motor Driver | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |