FAN4010IL6X_技术文档

March 2007

FAN4010

High-Side Current Sensor

Features at +5V

Description

■ Low cost, accurate, high-side current sensing

The FAN4010 is a high-side current sense ampliﬁer

designed for battery-powered systems. Using the

FAN4010 for high-side power-line monitoring does not

interfere with the battery charger’s ground path. The

FAN4010 is designed for portable PC’s, cellular phones,

and other portable systems where battery/DC power-line

monitoring is critical.

■ Output voltage scaling

■ Up to 2.5V sense voltage

■ 2V to 6V supply range

■ 2μA typical offset current

■ 3.5μA quiescent current

■ -0.2% accuracy

To provide a high level of ﬂexibility, the FAN4010 functions

with an external sense resistor to set the range of load

current to be monitored. It has a current output that can

be converted to a ground-referred voltage with a single

resistor, accommodating a wide range of battery voltages

and currents. The FAN4010 features allow it to be used

for gas gauging as well as uni-directional or bi-directional

current monitoring.

■ SOT23-5 package

■ 6-lead MicroPak™ future package option

Applications

■ Battery chargers

■ Smart battery packs

■ DC motor control

■ Over-current monitor

■ Power management

■ Programmable current source

Functional Block Diagram and Typical Circuit

Load

V_IN

R_Load

1007

5

4

NC

Load

1

2

3

GND

I_OUT

R_SENSE

V_IN

V_OUT

R_OUT

I_OUT

Figure 1. Functional Block Diagram and Typical Circuit

Ordering Information

Operating

Temperature Range

Packaging

Method

Part Number

Package

Pb-Free

SOT23-5

Yes

-40°C to +85°C

Reel

FAN4010IS5X

MicroPak-6

FAN4010IL6X*

Moisture sensitivity level for all parts is MSL-1.

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

*Future package option.

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

Pin Conﬁgurations

MicroPak

SOT23-5

6

GND

NC

1

2

3

1

5

4

Load

V_IN

Load

V_IN

NC

GND

I_OUT

5

4

2

3

I_OUT

NC

top view

Figure 2. SOT23-5 Pin Conﬁguration

Figure 3. MicroPak™-5 Pin Conﬁguration

Pin Assignments

SOT Pin #

MicroPak™ Pin #

Name

Description

1

2

3

4

5

2, 3

1

NC

No Connect; leave pin ﬂoating

Ground

GND

4

I

Output current, proportional to V - V

IN

OUT

Load

5

V

IN

Input voltage (supply voltage)

Connection to load or battery

6

Load

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

2

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable

above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition,

extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute

maximum ratings are stress ratings only.

Symbol

V_s

Parameter

Min.

Max.

6.3

Unit

V

Supply Voltage

0

V_IN

Input Voltage Range

6.3

V

Reliability Information

Symbol

Parameter

Min.

Typ.

Max.

Unit

T_J

T_STG

T_L

Junction Temperature

150

260

°C

Storage Temperature Range

-65

Reﬂow Temperature (Soldering)

MicroPak™-5

SOC23-5

271

191

°C/W

Package Thermal Resistance

θ_JA

Note:

1. Package thermal resistance (θ_JA), JEDEC standard, multi-layer test boards, still air.

ESD Protection

Symbol

HBM

Electrostatic Discharge Standard

Value

5kV

Human Body Model

Charged Device Model

CDM

1kV

Recommended Operating Conditions

The Recommended Operating Conditions table deﬁnes the conditions for actual device operation. Recommended ope-

rating conditions are speciﬁed to ensure optimal performance to the datasheet speciﬁcations. Fairchild does not recom-

mend exceeding them or designing to absolute maximum ratings.

Symbol

T_A

Parameter

Min.

-40

2

Typ.

Max.

+85

6

Unit

°C

V

Operating Temperature Range

V_s

Supply Voltage Range

Input Voltage Range

V_IN

2

6

V

V_SENSE

Sensor Voltage Range, V_SENSE= V_IN- V_Load;R_OUT= 0Ω

0

2.5

V

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

3

Electrical Characteristics at +5V

T_A= 25°C, V_s= V_IN= 5V, R_OUT= 100Ω, R_SENSE= 100Ω, unless otherwise noted.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Frequency Domain Response

P

V

_IN= -40dBm⁽²⁾,

_SENSE= 10mV

_IN= -20dBm⁽³⁾,

_SENSE= 100mV

BW_ss

Small Signal Bandwidth

600

2

kHz

P

V

BW_Ls

V_IN

Large Signal Bandwidth

Input Voltage Range

MHz

V

V_IN= V_s

2

6

V_SENSE= 0V

0

1

4

ꢀA

V_SENSE= 10mV

93

100

1.000

2.00

10.0

3.5

107

1.025

2.05

10.3

5.0

I_OUT

Output Current^(1,4)

V_SENSE= 100mV

0.975

1.95

9.7

mA

ꢀA

V_SENSE= 200mV

V_SENSE= 1V

Supply Current⁽¹⁾

V_SENSE= 0V, GND pin current

I_s

2

nA

%

I_SENSE

Load Pin Input Current

R

_SENSE= 100Ω,

-2.5

-0.2

2.5

A_CY

G_m

Accuracy

_SENSE= 200mV⁽¹⁾

Transconductance

I_OUT/V_SENSE

10000

ꢀA/V

Notes:

1. 100% tested at 25˚C.

2. -40dBm = 6.3mV into 50Ω.

pp

3. -20dBm = 63mV into 50Ω.

pp

4. Includes input offset voltage contribution.

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

4

Typical Performance Characteristics

T_A= 25°C, V_s= V_IN= 5V, R_OUT= 100Ω, R_SENSE= 100Ω, unless otherwise noted.

10

250

200

150

100

50

V_S= 5V

V_IN= 5V

R

_OUT= 0Ω

Average of 100 parts

R_OUT= 0Ω

+1 SIGMA

Average

R_OUT= 100Ω

1

0

-50

-100

-150

-1 SIGMA

0.1

0.01

0.1

1

0.1m

1m

10m

100m

1

10

V_SENSE(V)

Figure 4. V_SENSEvs. Output Current

Figure 5. Output Current Error vs. V_SENSE

10.4

3

V_SENSE= 1V

V_s= 5V

V

_IN= 5V

R_OUT= 100Ω

V_SENSE= 1V

R_L= 0Ω

10.2

10.0

9.8

0

-3

V_SENSE= 0.1V

V_SENSE= 0.01V

-6

9.6

-9

P_IN= -20dBm of V_SENSE= 0.1V & 1V

P

_IN= -40dBm of V_SENSE= 0.01V

9.4

-12

-40

-20

0

20

40

60

80

0.01

0.1

1

10

Temperature (°C)

Frequency (MHz)

Figure 6. Output Current vs. Temperature

Figure7. Frequency Response

12

10

8

R_OUT= 0Ω

R_OUT= 100Ω

V_SENSE= 1V

10

V_SENSE= 0.8V

V_SENSE= 0.6V

V_SENSE= 0.4V

V_SENSE= 0.2V

8

V_SENSE= 0.6V

6

V_SENSE= 0.4V

4

V_SENSE= 0.2V

2

0

-2

0

1

2

3

4

5

0

1

2

3

4

5

V_IN(V)

Figure 8. Transfer Characteristics

Figure 9. Transfer Characteristics

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

5

Typical Performance Characteristics (Continued)

T_A= 25°C, V_s= V_IN= 5V, R_OUT= 100Ω, R_SENSE= 100Ω, unless otherwise noted.

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

2.5

2.0

1.5

1.0

0.5

0

V_SENSE= 200mV

_OUT= 0Ω

Average of 100 parts

V_IN= 5V

_IN= -20dBm

_OUT= 100Ω

R

P

R

+1 SIGMA

Average

V_SENSE= 100mV

-0.5

-1.0

-1.5

-2.0

-2.5

-1 SIGMA

V_SENSE= 10mV

V_SENSE= 1mV

0.00001 0.0001 0.001

0.01

0.1

1

10

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

Frequency (MHz)

V_IN(V)

Figure 10. CMRR vs. Frequency

Figure 11. V_INvs. Output Current Error

6.0

V_IN= 5V

_OUT= 100Ω

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

R

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

1

V_SENSE(V)

Figure 12. Supply Current vs. V_SENSE

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

6

to compensate for this effect. Additionally, self heating

due to load currents introduces a nonlinearity error.

Care must be taken not to exceed the maximum power

dissipation of the copper trace.

Application Information

Detailed Description

The FAN4010 measures the voltage drop (V_SENSE

)

across an external sense resistor located in the high

voltage side of the circuit. V_SENSEis converted to a

linear current via an internal operational amplifier and

precision 100Ω resistor. The value of this current is

INPUT

LOAD

R_SENSE

0.3in Copper

0.1in Copper

0.3in Copper

V

_SENSE/100Ω (internal). Output current flows from the

I_OUTpin to an external resistor R_OUTto generate an

output voltage proportional to the current flowing to

the load.

5

4

Load

V_IN

1

2

3

NC

GND

I_OUT

Use the following equations to scale a load current to

an output voltage:

V_OUT

V

_SENSE= I_Load* R_SENSE

EQ.1

EQ.2

R_OUT

V_OUT= 0.01 x V_SENSEx R_OUT

R_Load

Figure 14. Using PCB Trace for R_SENSE

NC

Load

5

1

2

3

–

Selecting R

OUT

R_SENSE

V_SENSE

GND

I_OUT

+

R_OUTcan be chosen to obtain the output voltage ran-

ge required for the particular downstream application.

For example, if the output of the FAN4010 is intended

to drive an analog-to-digital convertor (ADC), R_OUT

should be chosen such that the expected full-scale

output current produces an input voltage that matches

the input range of the ADC. For instance, if expected

loading current ranges from 0 to 1A, a R_SENSEresistor

of 1Ω produces an output current that ranges from 0 to

10mA. If the input voltage range of the ADC is 0 to 2V,

a R_OUTvalue of 200Ω should be used.

1007

4

V_IN

V_OUT

R_OUT

Figure 13. Functional Circuit

SENSE

Selecting R

Selection of R_SENSEis a balance between desired accu-

racy and allowable voltage loss. Although the FAN4010

is optimized for high accuracy with low V_SENSEvalues, a

larger R_SENSEvalue provides additional accuracy. How-

ever, larger values of R_SENSEcreate a larger voltage

drop, reducing the effective voltage available to the load.

This can be troublesome in low-voltage applications.

Because of this, the maximum expected load current

and allowable load voltage should be well understood.

Although higher values of V_SENSEcan be used, R_SENSE

should be chosen to satisfy the following condition:

The input voltage and full-scale output current (I_{OUT_}

_FS) needs to be taken into account when setting up the

output range. To ensure sufficient operating head-

room, choose:

(R_OUT

* I_{OUT_FS}) such that

V_IN- V_SENSE- (R_OUT* I_{OUT_FS}) > 1.2V

EQ. 4

Output current accuracy for the recommended V_SENSE

levels between 10mV and 200mV are typically much

better than 1%. As a result, the absolute output volta-

ge accuracy is dependent upon the precision of the

output resistor.

10mV < V_SENSE< 200mV

EQ. 3

For low-cost applications where accuracy is not as

important, a portion of the printed circuit board (PCB)

trace can be used as an R_SENSEresistor. Figure 14

shows an example of this configuration. The resistivity

of a 0.1 inch wide trace of two-ounce copper is about

30mΩ/ft. Unfortunately, the resistance temperature

coefficient is relatively large (approximately 0.4% / C),

so systems with a wide temperature range may need

Make sure the input impedance of the circuit con-

nected to V_OUT

is much higher than R_OUTto ensure

accurate V_OUTvalues.

Since the FAN4010 provides a trans-impedance func-

tion, it is ideal for applications involving current rather

than voltage sensing.

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

7

Mechanical Dimensions

Dimensions are in millimeters unless otherwise noted.

Figure 15. 5-Lead SOT23 Package

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

8

Mechanical Dimensions

Dimensions are in millimeters unless otherwise noted.

2X

0.05

1.45

C

B

(1)

2X

0.05 C

(0.49)

5X

1.00

(0.75)

(0.52)

1X

A

TOP VIEW

0.55MAX

(0.30)

6X

PIN 1

0.05 C

0.05

0.00

RECOMMENED

LAND PATTERN

0.05 C

C

0.45

0.35

0.10

6X

0.00

0.25

6X

0.15

1.0

DETAIL A

0.10

C B A

0.40

0.30

0.05

C

0.35

0.25

5X

0.40

0.30

DETAIL A

PIN 1 TERMINAL

0.075 X 45

CHAMFER

0.5

BOTTOM VIEW

(0.05)

6X

(0.13)

4X

Notes:

1. CONFORMS TO JEDEC STANDARD M0-252 VARIATION UAAD

2. DIMENSIONS ARE IN MILLIMETERS

3. DRAWING CONFORMS TO ASME Y14.5M-1994

MAC06AREVC

Figure 16. 6-Lead MicroPak™ Package

FAN4010 Rev. 1.0.1

www.fairchildsemi.com

9

www.fairchildsemi.com


型号：	FAN4010IL6X
厂家：	FAIRCHILD SEMICONDUCTOR
描述：	High-Side Current Sensor 高侧电流传感器模拟IC 传感器信号电路光电二极管
文件：	总10页 (文件大小：247K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FAN4010IL6X [FAIRCHILD]

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