LB11660FV-TLM-E View Datasheet(PDF) - ON Semiconductor

Part Name

Description

View to exact match

LB11660FV-TLM-E

Monolithic Digital IC Half-pre Motor Driver Single-Phase Full-Wave, for Fan Motor

ON Semiconductor 

LB11660FV

*5. 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.

*6. PWM oscillator frequency setting capacitor

The PWM oscillator oscillates at f = 23kHz when CP is 200pF and at f = 46kHz when CP is 100pF, and this frequency becomes the

PWM reference frequency.

Note that the PWM frequency is given approximately by the following equation.

f [kHz]  (4.6×106) ÷C [pF]

*7. 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.

*8. HB pin

This pin provides a Hall effect sensor bias constant-voltage output of 1.25V.

*9. RMI pin

This pin is the speed control minimum speed setting.

The minimum output duty is set by R3 and R4. Leave R4 open to have the motor stop when the duty is 0%.

Rotation Control Timing Chart

Duty 100%

PWM

duty(%)

Duty 0%

VPWML

RMI

VTH(V)

VPWMH

Minimum

output duty

VTH voltage

RMI voltage

CPWM

Minimum speed

setting rotation

0V

On duty

PWM control variable speed mode Full speed mode

2.5V

0.5V

ON

OFF

www.onsemi.com

7

Share Link: