SK6908 [UTC]

SINGLE-PHASE DC-FAN MOTOR DRIVER; 单相直流风扇电机驱动器


型号：	SK6908
厂家：	Unisonic Technologies
描述：	SINGLE-PHASE DC-FAN MOTOR DRIVER 单相直流风扇电机驱动器驱动器风扇电机
文件：	总6页 (文件大小：255K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

SK6908

LINEAR INTEGRATED CIRCUIT

SINGLE-PHASE DC-FAN

MOTOR DRIVER

ꢀ

DESCRIPTION

SK6908 is a single-phase driver for dc-fan motors. It provides

SOP-8

high efficiency, low noise output and supports the functions of motor

lock protection, auto restart and rotation detection.

ꢀ

FEATURES

*Wide supply voltage range of 2.5V to 20V

*Output current I_O(MAX)=600mA

HSOP-8

*Operate with Hall element

*Lock protection

*Auto-restart when the motor lock is undone

*FG(frequency generator) output

*Package type SOP-8 and HSOP-8 expose pan

*Pb-free plating product number: SK6908L

ꢀ ORDERING INFORMATION

Order Number

Package

Packing

Normal

Lead Free Plating

SK6908L-S08-R

SK6908L-S08-T

SK6908L-SM1-R

SK6908L-SM1-T

SK6908-S08-R

SK6908-S08-T

SK6908-SM1-R

SK6908-SM1-T

SOP-8

Tape Reel

Tube

HSOP-8

Tape Reel

Tube

SK6908L-S08-R

(1)Packing Type

(2)Package Type

(3)Lead Plating

(1) R: Tape Reel, T: Tube

(2) S08: SOP-8, SM1: HSOP-8

(3) L: Lead Free Plating, Blank: Pb/Sn

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SK6908

LINEAR INTEGRATED CIRCUIT

ꢀ

PIN CONFIGURATION

OUT2

GND

OUT1

H-

VCC

H+

ꢀ

BLOCK DIAGRAM

REGULATOR

FG output

Vcc

CONTROL

BLOCK

OUT 1

OUT 2

H+

H-

Hysteresis

Amplifier

LOCK PROTECTION

AUTORESTART

BLOCK

TSD

GND

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SK6908

LINEAR INTEGRATED CIRCUIT

ꢀ

ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)

PARAMETER

SYMBOL

RATINGS

UNIT

Supply voltage

Supply current

Circuit current

FG output current

V_CC

I_CC

I_O

600

I_FG

SOP-8

P_D

700

1000

Power dissipation (Derate at Ta=25℃ reduce 5.5mW/℃)

HSOP-8

P_D

Output Voltage

V_OUT

V_HIC

T_OPR

T_STG

Hall input common mode voltage range

Operating ambient temperature

Storage temperature

1.0 ~ Vcc-0.5

-20 ~ +100(Note1)

-55 ~ +150

℃

Note 1.For operation in ambient temperatures above 25℃ ,the driver device must be derated based on a 150℃

maximum temperature

Note 2.Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

Note 3.The device is guaranteed to meet performance specification within 0℃~+70℃ operating temperature range

and assured by design from -20℃~+100℃.

ꢀ

ELECTRICAL CHARACTERISTICS (Ta=25℃ , V_CC=5V)

PARAMETER

SYMBOL

I_CC

CONDITIONS

In drive mode (C_T=L)

MIN TYP MAX UNIT

Current drain

In lockup protection mode (C_T=H )

V 1PIN = 1.1V

4.1

2.8

Lockup detection capacitor charge current

Capacitor discharge current

Capacitor charge/discharge current ratio

CT charge voltage

I_CT1

I_CT2

V 1PIN = 1.1V

0.3 0.5 0.8

5.6

R_CT

V_CT1

V_CT2

V_OL

V_OH

1.9

CT discharge voltage

0.7

Output low level voltage

I_O=200mA

0.3 0.7

3.9 4.1

Output high level voltage

I_O=200mA

Zero peak value

(including offset and hysteresis)

Hall input sensitivity

V_HIN

Hall input-output gain

G_HO

V_FG

320 500 680

0.3 0.5

FG output pin low voltage

FG output pin leakage current

I_FG=5mA

I_FG(LEAK)V_FG=15V

ꢀ

HALL SINGLE INPUT-OUTPUT TRUTH VALUE TABLE

H+

H-

OUT1

OUT2

* CT=0V

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SK6908

LINEAR INTEGRATED CIRCUIT

ꢀ

LOCKUP PROTECTION / AUTOMATIC RECOVERY

Fig. 1

H+

OUT1

VCT1

Toff

Ton

VCT2

depend on the hall output

motor lock detect lock

lock cancel

release

C × (VCT1-VCT2)

Ton (charge time) =

Toff (charge time) =

ICT1

ICT2

C : Value of capcitor at CT terminal

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SK6908

LINEAR INTEGRATED CIRCUIT

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POWER DISSIPATION

Fig.-2

1000

800

700

600

SK6908

400

200

75 85 100 125

150 175

Ta(℃)

To use at temperature above Ta=25℃ reduce 5.5mW/℃

The maximum junctions temperature is 150°C in plastic packages, but for reasons of reliability, a lower number may

be mandated.

P_T= T_J(MAX)– Ta _(MAX)/ θ_JA

P_T= Total Power Dissipated by the Device

_{J (MAX)}= Maximum Junction Temperature

Ta_(MAX)= Maximum Ambient Temperature

_JA= l75°C/W

ꢀ

THERMAL SHUTDOWN(TSD)

Fig.-3

OUTPUT OFF

OUTPUT ON

TSD ON

TSD ON ( Typ : 175℃ )

TSD OFF ( Typ : 150℃ )

TSD OFF

150℃

175℃

Junction Temperature (℃)

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SK6908

LINEAR INTEGRATED CIRCUIT

ꢀ

TYPICAL APPLICATION CIRCUIT

Coil

Vcc

OUT2

GND

OUT1

H-

output

0.0033μf

SK6908

Vin

Hall

0.1μf

Element

Vcc

H+

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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