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PDF LB11967V Data sheet ( Hoja de datos )
| Número de pieza | LB11967V | |
| Descripción | Bariable Speed Single-Phase Full Wave Pre-Driver | |
| Fabricantes | Sanyo Electric | |
| Logotipo |  |
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Ordering number : ENN8362
LB11967V
Monolithic Linear IC
Bariable Speed Single-Phase Full-Wave
Pre-Driver For Fan Motor
Overview
The LB11967V is a single-phase bipolar variable speed fan motor predriver that works with an external PWM signal.
A highly efficient, quiet and low power consumption motor driver circuit, with a large variable speed, can be implemented
by adding a small number of external components.
This device is optimal for driving large scale fan motors (with large air volume and large current) such as those used in
servers and consumer products.
Functions and Features
• Pre-driver for single-phase full-wave drive
⇒ PNP-EMOS is used as an external power TR, enabling high-efficiency low-consumption drive by means of the
low-saturation output and single-phase full-wave drive. (PMOS-NMOS also applicable)
• External PWM input enabling variable speed control
⇒ Separately-excited upper direct PWM (f = 25kHz) control method, enabling highly silent speed control
• Compatible with 12V, 24V, and 48V power supplies
• Current limiter circuit incorporated
⇒ Chopper type current limit at start
• Reactive current cut circuit incorporated
⇒ Reactive current before phase change is cut to enable silent and low-consumption drive.
• Minimum speed setting pin
⇒ Minimum speed can be set with external resistor. The start assistance circuit enables start at extremely low speed.
• Constant-voltage output pin for Hall bias
• Lock protection and automatic reset functions incorporated
• (Rotation speed detection), RD (Lock detection) output
Specitications
Absolute Maximum Ratings at Ta = 25°C
Parameter
VCC maximum supply voltage
OUT pin maximum output current
OUT pin output withstand voltage
HB maximum output current
Symbol
VCC max
IOUT max
VOUT max
HB
Conditions
Ratings
Unit
18 V
50 mA
18 V
10 mA
Continued on next page.
www.DataSheet4U.com
81005 SY PC No.8362-1/10
1 page  
12V Sample Application Circuit
LB11967V
Vz = 18V
CB = to 0.022µF
RB = 10kΩ
ROUT = 100Ω
SOP8901
RF
PWM-IN
6VREG
H
CP = 100pF
25kHz
CT = 0.47µF
RFG, RRD = 10kΩ to 100kΩ
VOVER
HB
IN-
IN+
VCC
RD
FG
SENSE
VLIM
6VREG
RMI
ROFF
R = 0 to 5kΩ
VTH
OUT1P
OUT1N
CPWM
CT
OUT2P
OUT2N
SGND
No.8362-5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LB11967V.PDF ] | |
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