FD0251F [FEELING]

Smart motor driver with embedded Hall sensor;


型号：	FD0251F
厂家：	Feeling Technology
描述：	Smart motor driver with embedded Hall sensor
文件：	总12页 (文件大小：152K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FEELING

TECHNOLOGY

FD0251f

FD0255f

Smart motor driver with embedded Hall sensor

Features

ꢀ

Motor driver with integrated Hall sensor

High current driving capability

Lock-shutdown protection & auto-restart function

Built-in FG(frequency generation) signal outputPrecise magnetic switching thresholds

“Soft-switch” phase-switching technique to reduce vibration and acoustic noise(patent pending)

Thermal shutdown protection

Halogen Free

PWM speed control(only available for FD0255f)

Available in both TS825(FD0251f) and TS826(FD0255f) packages

General Description

FD0251f/FD0255f is a single coil motor driver with embedded Hall sensor. It integrates the motor driver with the Hall

sensor, which simplifies the PCB(printed circuit board) design and make the fabrication of small-size motors

possible.

Lock-shutdown and auto-restart function keeps the motor from being over-heated and restarts the motor after being

locked.

“Soft-switch” phase-switching technique is used to reduce the vibration and acoustic noise.

Thermal-shutdown protection ensures the motor driver to operate under specified temperature ranges.

All the protection mechanisms mentioned above combine to provide a complete protecting scenario for the motor

system, keep the motor system from possible damages and guarantee correct operations.

Block Diagram

Bias Generator

Chopper amplifier

Hall Plate

Oscillator

Coil Driver

Digital control logics

Power On

Reset

Figure.1

This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.

No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.

Rev1.2 Nov. 06, 2008

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FD0251f

FD0255f

Pin Connection

FD0251f

FD0255f

Figure.2

Pin Descriptions

Name

I/O

FD0251f

FD0255f

Description

Frequency generation

Ground

VSS

Driver output

VDD

PWM

Positive power supply

Pulse Width Modulation speed control

Legend: I=input, O=output, I/O=input/output, P=power supply, G=ground

Functional Descriptions

Refer to the block diagram (Figure.1), FD0251f/FD0255f is composed of the following building blocks:

ꢀ

Bias generator

The bias generator provides precise, temperature- and process-insensitive bias references for the analog blocks.

These references guarantee proper operation of the IC under all conditions specified in this specification.

ꢀ

Oscillator

The built-in oscillator provides the clock signal for the digital control logics

Power-on Reset

Used to detect the power-up ramp and reset the digital circuits.

Chopper Amplifier

ꢀ

To achieve a higher magnetic sensitivity the chopper amplifier structure is adopted in this design. Use of this

structure dynamically removes both the offset and flicker noise at the same time.

ꢀ

Digital control logics

Hall sensor part – generates controlling signals for the Hall sensor.

Coil driver part – generates controlling signals for the Coil driver.

ꢁ

ꢀ

Rev1.2 Nov. 06, 2008

P.2

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FD0251f

FD0255f

ꢀ

PWM control

PWM(pulse-width modulation) is used for the speed control for FD0255f. 2 types of PWM input signals can be

used :

Voltage mode PWM :

Applying a constant(DC) voltage to the PWM pin and the FD0255f will generate PWM pulses internally with

the “ON” duty cycle ratio according to the diagram below(Figure.3), which can be utilized by the user to control

the speed of the motor. The rotation speed will be higher if the voltage applied to the PWM pin is higher.

"ON" ratio

100%

0.5VDD

0.14VDD

Figure.3

Pulse mode PWM :

User can also apply PWM pulses directly to the PWM pin. The FD0255f will pass this pulse to the coil driver

with the original duty-cycle ratio.

Note:

(1) This function is only available for FD0255f

(2) While using pulse mode PWM, the “High” Value of the input pulse should be higher than 0.5*VDD and the

“Low” value should be lower than 0.14*VDD

(3) The lower-limit for the PWM pulse frequency is 200Hz, and the recommended frequency range is higher

than 30KHz where the PWM input pulses will not generate acoustic noise.

Note. The “PWM” pin contains an internal pull-up resistor so the FD0255f will rotate at full-speed(100% ON)

when this pin is left un-connected(floating).

Rev1.2 Nov. 06, 2008

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FD0251f

FD0255f

Absolute Maximum Ratings

Values

typ.

Parameter

Symbol Conditions

Unit

min.

-20

max.

105

150

6.5

Operating Temperature

Storage Temperature

DC Supply Voltage(V_{DD ,}FG)

T_OP

T_ST

℃

-40

V_DD

PWM_HIGH

PWM_LOW

I_DD

>0.5V_DD

6.5

PWM Voltage Range

<0.14V_DD

Supply Current

Continuous Current

Hold current

I_CONT

I_HOLD

I_SINK

500

800

FG, RD sink current

Junction Temperature

T_J

170

500

520

℃

P_DTS825

P_DTS826

℃/mW

Gauss

℃

Maximum Power Dissipation

Thermal resistance (note1)

TS825

TS826

TS825

TS826

0.290

0.278

0.020

0.018

θja

θjc

Magnetic Flux Density

Unlimited

260

IR-Reflow Lead Temperature

10sec

Note1: device mounted with copper area of approximately 10mm^2,1ØZ, no air flow. (room temperature: 25 ℃)

255 ± 5 ^oC

10 ± 1 sec

150 ± 10 ^oC

90 ± 30 sec

2~5 ^oC /sec

SECOND

IR-ReFlow Soldering Condition

Figure.4

TS826 Power Dissipation Curve

TS825 Power Dissipation Curve

Pd (mW)

500

520

430

340

250

160

414

328

242

156

105

170

175

100

125

150

175

100

125

150

Temp. (

)

Temp. (

)

Figure.5

Figure.6

Rev1.2 Nov. 06, 2008

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FD0251f

FD0255f

Recommended Operating Conditions

Values

typ.

Parameter

Conditions

Unit

min.

1.8

max.

5.5

Supply Voltage

Ambient Temperature

-10

℃

Electrical Characteristics V_DD=5.0V, T_A=25℃ (unless otherwise specified)

Values

Parameter

Conditions

Unit

min.

typ.

max.

Average Supply Current(no load)

Output Saturation Voltage(FG)

Output leakage current(FG)

On resistance(Rpmos+Rnmos)

Thermal Shutdown Threshold

1.8

I_out= 10mA

V_out=5V

0.5

µA

Ω

0.8

165

℃

Magnetic Characteristics

Values

typ.

Parameter

Conditions

Unit

min.

max.

Operate Points ( B_OP

Release Points ( B_RP

Hysteresis

)

-25

Hysteresis Characteristics

Brp

Bop

Brp

Bop

Figure.7

Rev1.2 Nov. 06, 2008

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FD0251f

FD0255f

Application Circuit Reference

FD0251f

FD0255f

VDD

Schottky

diode 0.2V

VDD

Schottky

diode 0.2V

1K Ohm

(0603)

4.7 Ohm

(0603)

4.7 Ohm

(0603)

ZD1

6.5V

ZD1

6.5V

MLCC (0603)

2.2uF/6.3V

MLCC (0603)

2.2uF/6.3V

100 Ohm

(0603)

100 Ohm

(0603)

Figure.8

Note

Must use C1 capacitor for the decoupling between V_DDand V_SSand place the capacitor as close to the IC as

possible.

Option component

1. ZD1: V_DDover-voltage stress protection diode.

2. R2: current limit resistor for Open Drain FG output.

3. R3: PWM Pull-up resistor for Open Drain PWM source signal.

4. R4: de-coupling resistor for long-distance signal transmission .

Rev1.2 Nov. 06, 2008

P.6

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FD0251f

FD0255f

The IC laying aside mode declaration is as follows:

FAN magnet

PCB board

Chip

IC marking side

Rev1.2 Nov. 06, 2008

P.7

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FD0251f

FD0255f

Package Dimension (Unit: mm)

TS825 (Halogen Free)

Top view: marking side

Sensor location

0.86mm

1.02mm

Dimension In Millimeters

Symbols

Min

Nom

0.750

Max

0.700

0.350

0.100

2.800

3.700

1.500

0.775

0.500

0.200

3.100

3.900

1.700

Θ1

2.900

3.800

1.600

0.950 BSC

1.900 BSC

10˚

Θ1

4˚

12˚

Rev1.2 Nov. 06, 2008

P.8

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FD0251f

FD0255f

Package Dimension (Unit: mm)

TS826 (Halogen Free)

Top view: marking side

Sensor location

0.86mm

1.02mm

Dimension In Millimeters

Symbols

Min

Nom

0.750

Max

0.700

0.350

0.100

2.800

3.700

1.500

0.775

0.500

0.200

3.100

3.900

1.700

Θ1

2.900

3.800

1.600

0.950 BSC

1.900 BSC

10˚

Θ1

4˚

12˚

Rev1.2 Nov. 06, 2008

P.9

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FD0251f

FD0255f

Packing Specification (Tapping Reel)

TS825

Top view: marking side

Rev1.2 Nov. 06, 2008

P.10

FEELING

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FD0251f

FD0255f

TS826

Top view: marking side

Rev1.2 Nov. 06, 2008

P.11

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FD0251f

FD0255f

IC Pin Connection

Marking Distinguish

Order Information

Part Number

Package

TS825

Tapping Reel Qty’s

Marking

FD0251fR-G1

FD0255fR-G1

10000EA / PER REEL

bbXXXXg

baXXXXg

TS826

Rev1.2 Nov. 06, 2008

P.12

FD0251F [FEELING]

相关型号：

FD0251fR-G1

FD0252B

FD0252bVR-G1

FD0252F

FD0252fR-G1

FD0255b

FD0255bVR-G1

FD0255f

FD0255fR-G1

FD0256b

FD0256bVR-G1

FD0256f