SDC280Z4-E1 [SDC]

Smart Two-Phase DC Fan;


型号：	SDC280Z4-E1
厂家：	Shaoxing Devechip Microelectronics Co., Ltd
描述：	Smart Two-Phase DC Fan
文件：	总9页 (文件大小：295K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Datasheet

Smart Two-Phase DC Fan

General Description

SDC280

Features

SDC280 is a CMOS integrated circuit which includes Hall

sensor and output drive circuits. It’s widely used in

various small two-phase fans and DC motors. The locked

protection and auto-restart function is integrated inside

the IC. Input offset voltage can be dynamically adjusted by

built-in chopper amplifier, greatly improving the magnetic

field sensitivity. It is built-in power reverse protection

function.



High voltage CMOS technology

Peak output current up to 1A

Operating voltage range:3.5V~24V

Sustainable 350mA operating current

High sensitivity Hall sensor

Locked protection and auto-restart

Power reverse protection

Including protection diodes to clamp the output

Operating temperature: -40°C~85°C

Package: TO-94

Applications



Brushless DC fan motors

Brushless DC motors

TO-94

Figure 1. Package Type

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Datasheet

Smart Two-Phase DC Fan

Pin Configuration

SDC280

Package: TO-94

1.VDD

2.DO

3.DOB

4.GND

1 2 3 4

Figure 2. Pin Configuration

Pin Number

Pin Name

VDD

Functions

Power supply pin

Output 1 pin

Output 2 pin

Ground pin

DOB

GND

Table 1. Pin Description

Functional Block Diagram

VDD

REG

Amp

Control

Logic

DOB

GND

Figure 3. Functional Block Diagram

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Datasheet

Smart Two-Phase DC Fan

Ordering Information

SDC280

E1: Pb-free

G1: Halogen-free

Circuit Type

Package

TO-94: Z4

Part Number

Marking ID

Temperature

Range

Packing

Type

Package

Pb-free

Halogen-free

SDC280Z4-G1

Pb-free

280

Halogen-free

280G

TO-94

-40°C~85°C

SDC280Z4-E1

Bulk

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Datasheet

Smart Two-Phase DC Fan

SDC280

Absolute Maximum Ratings (Note: Stresses greater than those listed under absolute maximum ratings may cause

permanent damage to the device.)

Parameters

Symbol

V_DD

Value

Unit

Power supply

Magnetic field intensity

Output current

Continuous

Hold

350

I_OUT

500

Peak

1000

-65 to 150

550

Storage temperature

Power dissipation

T_S

P_D

°C

Maximum junction temperature

T_J

150

ESD,HBM model per MIL-STD-883H Method 3015

ESD,MM model per JEDEC EIA/JESD22-A115

Latch-up per JEDEC78

HBM

2000

200

Table 2. Absolute Maximum Ratings

Recommended Operating Conditions

Parameter

Symbol

V_DD

Min

Max

Unit

Power supply

3.5

-40

Operation temperature

°C

Operating current (continuous), V_DD=24V

I_OUT

300

Table 3. Recommended Operating Conditions

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Datasheet

Smart Two-Phase DC Fan

SDC280

Electrical Characteristics (Ta=25°C, V_DD=12V, unless otherwise specified)

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Power supply

V_DD

V_DD=24V, output open

3.5

6.0

Operating current

Output clamp voltage

Output saturation voltage

Output leakage current

Lock on time1

I_DD

4.2

V_OUT-CLAMP

V_SAT

V_DD=12V, I_O=300mA

V_DD=V_DO/DOB= 12V

V_DD>7V

0.35

0.1

300

1.8

600

3.6

0.5

I_LEAK

t_ON1

Lock off time1

t_OFF1

V_DD>7V

Lock on time2

t_ON2

V_DD<5V

Lock off time2

t_OFF2

V_DD<5V

Table 4. Electrical Characteristics

Magnetic Characteristics (Ta=25°C, V_DD=12V, unless otherwise specified)

Parameter

Operating point

Release point

Hysteresis

Symbol

Min

Typ

Max

Unit

B_OP

-10

B_RP

-40

B_Hys

Table 5. Magnetic Characteristics

V_DO

V_DOB

Off-state

B_H

On-state

B_RP

B_OP

B_RP

B_OP

Figure 4. Magnetic Characteristics

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Datasheet

Smart Two-Phase DC Fan

Power Dissipation Curve

SDC280

P_D(mW)

700

600

500

400

300

200

100

75 85 100

125

150 Ta(°C)

Figure 5. Power Dissipation Curve

Function Description

SDC280 is a single-chip integrated circuit that drives

two-phase brushless DC fan. It contains voltage regulator,

Hall voltage generator, chopper amplifier, hysteresis

comparator, oscillator, logic control unit, and output

high-voltage switch. After fan is powered on, the internal

oscillator begins to work, the output switching signal

begins to drive switches work in a certain delay, the fan is

started. The magnetic field signal is sensed by the internal

Hall-voltage generator to produce the Hall voltage,

through the chopper amplifier and hysteresis comparator,

to generate the alternating drive signal to drive switching

transistors alternately turn on the fan to finish booting.

When the fan is locked, the internal Hall sensor senses the

same signal and hysteresis comparator outputs fixed

signal. Through the logic controller and a certain delay, a

signal is generated to make the output switch off, fans are

protected. When locked condition is released, like the

start, the fan will be automatically restarted.

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Datasheet

Smart Two-Phase DC Fan

SDC280

Typical Application

VCC

SDC280

GND

VDD

DOB

Figure 6. Typical Application

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Datasheet

Smart Two-Phase DC Fan

SDC280

Package Dimension

TO-94

Dimensions In Millimeters

Dimensions In Inches

Symbol

Min

Max

1.800

0.900

0.550

0.510

5.350

4.850

3.750

Min

Max

0.071

0.035

0.022

0.020

0.214

0.194

0.148

1.400

0.700

0.380

0.360

5.050

4.550

3.450

0.055

0.028

0.015

0.014

0.202

0.128

0.136

1.270 TYP.

10°TYP.

0.050 TYP.

10°TYP.

14.300

14.700

0.572

0.588

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Datasheet

Smart Two-Phase DC Fan

SDC280

Shaoxing Devechip Microelectronics Co., Ltd.

UUhttp://www.sdc-semi.com/UU

IMPORTANT NOTICE

Information in this document is provided solely in connection with Shaoxing Devechip Microelectronics Co., Ltd. (abbr. SDC) products.

SDC reserves the right to make changes, corrections, modifications or improvements, to this document, and the products and services

described herein at anytime, without notice. SDC does not assume any responsibility for use of any its products for any particular

purpose, nor does SDC assume any liability arising out of the application or use of any its products or circuits. SDC does not convey

any license under its patent rights or other rights nor the rights of others.

Headquarters of Shaoxing

Address: Tian Mu Road, No13,

Shaoxing city, Zhejiang province, China

Zip code: 312000

Shenzhen Branch

Address: 22A, Shangbu building, Nan Yuan Road, No.68,

Futian District, Shenzhen city, Guangdong province, China

Zip code: 518031

Tel: (86) 0575-8861 6750

Tel: (86) 0755-8366 1155

Fax: (86) 0575-8862 2882

Fax: (86) 0755-8301 8528

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