LB11967V

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




Pinout






Specifications

Absolute maximum ratings
Vm min [V]	-
Vm max [V]	-
IO max [A]	0.05

Description

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.

LB11967V is optimal for driving large scale fan motors (with large air volume and large current) such as those used in servers and consumer products.