APX9266 데이터 시트보기 (PDF) - Anpec Electronics

부품명

상세내역

일치하는 목록

APX9266

Single-Phase Full-Wave Motor Driver for Silent Fan Motor

Anpec Electronics 

APX9266

Application Information (Cont.)

PWM input (Cont.)

The input level of PWM terminal is

H : High side output transistor is ON

L : High side output transistor is OFF

(see Truth Table).

When PWM terminal is open, it is equal to high

IN+

PWM

OUT1

OUT2

FG

Figure 4.PWM Input Waveform

CT Capacitor

The capacitor that is connected from CT pin to GND

determines the shutdown time and restart time.

( ) Restart Time = CCT × VCTH − VCTL

ICT1

( ) Shutdown Time = CCT × VCTH − VCTL

ICT2

Where:

CCT = CT pin capacitor

For example:

CCT= 0.47µF

Restart Time=0.52s, Shutdown Time=3.13s

The value of charge capacitor in range of 0.47µF to 1µF

is recommended .

FG Resistor

The value of the FG resistor could be decided by the fol-

lowing equation:

V V RFG =

CC − FG

I

For example:

VCC= 5V, I=3mA, VFG= 0.2V, RFG= 1.6kΩ

The value of resistor in the range of 1KΩ to 10KΩ is

recommended.

Thermal Consideration

Refer to “Maximum Power Dissipation vs. Ambient

Temperature”, the IC is safe to operate below the curve

and it will eable the thermal protection if the operating

area is above the line. For example, TA= 75°C, the

maximum power dissipation is about 0.48w.

The power dissipation can be calculated by the following

equation:

PD = (VCC − VOUT1−VOUT2 ) × IOUT + VCC × ICC

For example:

if VCC=5V, ICC=4mA, IOUT=300mA, VOUT1=4.81V,

V =0.17V, then P =0.128W

OUT2

D

The GND pin provides an electrical connection to ground

and channeling heat away. The printed circuit board (PCB)

forms a heat sink and dissipates most of the heat into

ambient air.

Copyright © ANPEC Electronics Corp.

10

Rev. A.4 - Mar., 2008

www.anpec.com.tw

Share Link: