FP133D-LF [FEELING]

Over Current Protection IC With Shunt Regulator;


型号：	FP133D-LF
厂家：	Feeling Technology
描述：	Over Current Protection IC With Shunt Regulator
文件：	总10页 (文件大小：279K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FP133

Over Current Protection IC With Shunt Regulator

General Description

FP133 is a main rail current detection and over current protection IC. It includes a current shunt

comparator and shutdown comparator with a precision shunt regulator like FP431.

The rail current detection gain can be adjusted with three external resistors. The regulator

output CSO pin is connected to a shutdown comparator for driving a protection circuit like a

photo-coupler to shutdown the primary side PWM IC when over current occurs.

The voltage shunt regulator has a 2.5V reference for switching power supply secondary output

voltage feedback.

FP133 can be used for OCP and output voltage feedback function with few external parts. It is

suitable for application in secondary main rail power supply of SPS or isolated fly-back DC-DC

converter.

Features

 Independent Power Supply Voltage: 2.7 to 28V

 Wide Operating Temperature Range: -20℃~ +105℃

 Independent Shunt and Supply Voltage

 Low Input Offset Voltage

 Sense Gain Adjustable

 Built-in 1.25V Comparator for O.C.P

 Shunt Regulator Voltage: 2.5V (1.0%)

 Output Sink Current Capability up 50mA

 Package: SOP-8L

Typical Application Circuit

 SPS

 AC Adaptor

 Isolated Fly-back DC-DC Converter

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

1/10

FP133

Function Block Diagram

V_IN

V_CC

REF

Current Shunt Regulator

with Shutdown Comparator

Voltage Shunt

Regulator

2.5V

1.25V

GND

(AN)

CSO

FPO

V_IP

Pin Descriptions

SOP-8L

Name No. I / O

Description

Top View

V_IP

Positive Input of Current Shunt OPA

V_IP

V_IN

Output of Current Shunt OPA to Inverting

Input of Shutdown Comparator

CSO

O / I

V_CC

CSO

REF

2.5V Reference

Voltage Shunt Cathode Input

IC Ground

FPO

GND

FPO

V_CC

V_IN

Shutdown Comparator Output (O.C.)

IC Power Supply

Inverting Input of Current Shunt OPA

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

2/10

FP133

IC Date Code Identification

SOP-8L

FP133

Halogen Free

Lot Number

Internal & ID

Per-Half Month

Year

Halogen Free: Halogen free product indicator

Lot Number: Wafer lot number’s last two digits

For Example: 132386TB  86

Internal ID: Internal Identification Code

Per-Half Month: Production period indicated in half month time unit

For Example: January → A(Front Half Month), B (Last Half Month)

February → C(Front Half Month), D(Last Half Month)

Year: Production year’s last digit

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

3/10

FP133

Ordering Information

Part Number

Operating Temperature Package

MOQ

100EA

2500EA

Description

Tube

FP133D-LF

FP133DR-LF

SOP-8L

-20°C ~ +105°C

Tape & Reel

Absolute Maximum Ratings

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Power Supply Voltage

V_CC

Current Shunt Regulator Common

Mode Inputs Voltage

Current Shunt Regulator

Differential Inputs Voltage

-0.3

(V_IP-V_IN)

-15

1.5

CSO Voltage

-0.3

V_CC

FPO Sink Current

FPO Off Voltage

Cathode Voltage

Cathode Continuous Current

Reference Input Current

Maximum Junction Temperature

Storage Temperature Range

-50

°C

-0.05

T_J

+150

T_S

-55

Power Dissipation

Lead Temperature

570

°C

T_A=25°C

(soldering, 10 sec)

+260

IR Re-flow Soldering Curve

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

4/10

FP133

Recommended Operating Conditions

Parameter

Symbol

Conditions

Min.

2.7

Typ.

Max.

Unit

Supply Voltage

Operating Temperature

V_cc

-20

+105

°C

DC Electrical Characteristics

(V_CC=5V, T_A= -20°C~+105°C, V_IP=12V, R_OUT=125kΩ unless otherwise noted)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Current Shunt Comparator Section

Full Scale Sense Voltage

V_SENSE

100

500

V_SENSE=V_IP－V_IN

Common-Mode Input Voltage

V_CM

2.7

V_IP=2.7V to 28V,

Common-Mode Rejection

Input Offset Voltage vs Temp

Input Offset Voltage vs V_CC

CMRR

100

120

_SENSE=50mV

T_MINto T_MAX

V_OFFSETV_IN=2.7V to 28V,

V_OFFSET

₍T_A)

µV / °C

µV / V

2.5

₍v_cc)

V_SENSE=50mV

Input Bias Current

I_BIAS

V_IP,V_IN

µA

Non-linearity Error

NLE

V_SENSE=10mV to 150mV

±1

±2

Total Output Error

TOE V_SENSE=100mV

Output Impedance

Voltage Swing to V_CC

Voltage Swing to V_CM

Bandwidth

R_OUT

V_SCC

V_SCM

1||5

V_CC-0.8

V_CM-0.5

GΩ||pF

T_S

kHz

μS

R_OUT=125KΩ

Settling Time

5V Step, R_OUT=125KΩ

Total Output-Current Noise

Shutdown Comparator Section

I_NOISEBW=100KHz

Input Offset Voltage

Common-Mode Voltage (IN-)

Voltage Gain

V_OFFSET

1.0

5.0

V_CM

A_V

-0.3

V_CC-1.5

200

300

1.3

V/mV

Large Signal Response Time

Response Time

μS

V_CSO>1.3V

_FPO= 1.0V

V_CSO>1.3V

_FPO=10mA

V_CSO<1.0V

V_FPO= 28V

Output Sink Current

Saturation Voltage

I_SINK

V_SAT

Output Leakage Current

0.1

μA

1.238

1.225

1.25

1.263

1.275

T_A=25℃

Reference Voltage (2%)

Line Regulation

V_REF

T_A=-25℃~105℃

3V≦V_CC≦28V

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

5/10

FP133

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Voltage Shunt Regulator Section

Reference Voltage

V_REFV_KA=V_REF, I_KA=10mA

I_KA=10mA, V_KA=10V~ V_REF

2.475

2.5

2.525

V Reference vs. Temperature

-1.4

-1.0

0.5

-2.0

ΔV_REF

Line Regulation

mV / V

I_KA=10mA, V_KA=10V~

28V

-2.0

ΔV_KA

Reference Current

I_REF

R1=10KΩ, R2=∞, I_KA=10mA

μA

R1=10KΩ, R2=∞, I_KA=10mA,

T_A=Full rang

I Reference vs. Temperature

0.4

0.1

1.2

0.5

∆I_REF

Minimum Cathode Current for

Regulation

I_{KA (MIN)}V_KA=V_REF

_KA=V_REF,

Dynamic Impedance

|Z_KA

0.2

0.8

0.5

ΔI_KA=0.1mA~15mA

Frequency < 1KHz

Total Device Section

Output Off IC Current

I_CC

V_CC=28V

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

6/10

FP133

Function Description

Current Shunt Regulator

The figure below shows the FP133 current shunt block, load current (I_S) flowing from power

supply and a dropout voltage (V_IN⁺-V_IN) at the sense resistor (R_S).

Assume internal NPN transistor collector current is same as emitter current (I_O) and V_IPis very

close to V_IN, the FP133 transfer function is:





----- (1)

V_IN V_IN

I_O



RG1

In this figure, the (V_IN⁺-V_IN), is equal to I_Sx R_Sand the current shunt output voltage (CSO) is

equal to I_Ox R_L. The final transfer function for rail current measurement in this application is:

V_CSO GI_SR_S----- (2)

G  R_LRG1

----- (3)

In FP133 internal circuits, the CSO output is connected to the shutdown comparator inverting

input. When the voltage of CSO is higher than the internal reference voltage (1.25V), the FPO pin is

switching from high to low state. This signal can be used for OCP protection control.

V_IN

V_IN-

LOAD

RG2

RG1

To Fault Protection

Circuits

V_IP

V_IN

FPO

1.25V

V_CC

GND

CSO

Note:

1. The minimum operating voltages of V_CC, V_IPand V_INare 2.7V. If these supply voltages are

lower than 2.7V, the transfer function at current shunt output (CSO) is no correct.

2. Do not force a V_INvoltage that is 15V higher than V_IP. This condition would generate a leakage

current and an incorrect voltage at FP133 output.

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

7/10

FP133

Voltage Shunt Regulator

The figure below shows the FP133 voltage shunt regulator. It includes an internal 2.5V voltage

reference connecting to the comparator inverting input. The comparator’s high cathode current sink

ability is designed for photo-coupler driving.

The V_OUTequation is:







V_OUT 1

 2.5V ---- (4)







V_OUT

REF

2.5V

Reference

GND

Note

1. Connect a compensation network between CA and REF pins to reduce high output voltage

ringing during light loading or transient.

2. R3 is selectable for dynamic loading feedback.

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

8/10

FP133

V_OUT

LOAD

RG1

RG2

FP384x

V_IN

V_IP

V_CC

GND

FPO

V_AUX

FP133

REF

CSO

Adaptor secondary Voltage Feedback / Over Loading Protection circuit

The above circuit is a simple application for AC / DC adaptor over loading protection (OCP)

function with output voltage feedback.

For example, when load current (I_S) increases, the FP133 CSO voltage would increase according

to equation (2). Once the internal shutdown comparator’s inverting input, which is connected to CSO

pin, is higher than 1.25V reference, a sink current (I_OUT) will flow through the photo-coupler. The

FP384x PWM IC will change the NMOS drive terminal to a minimum duty cycle current limitation for

secondary side over current protection. The primary side auxiliary voltage can no longer maintain the

FP384x power supply. The FP384x will be shutdown until AC line start-up voltage restart the PWM IC.

The FP133 voltage shunt regulator responses the output voltage change with R1 and R2. The

feedback current will flow from photo-coupler to FP133 CA pin (pin4) and generates the feedback

voltage signal to PWM IC FP384x.

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

9/10

FP133

Package Outline

SOP-8L

UNIT: mm

Symbols

Min. (mm)

1.346

0.101

1.092

4.800

3.810

5.791

0.406

0°

Max. (mm)

1.752

0.254

1.498

4.978

3.987

6.197

1.270

8°

θ°

Note:

1. Package dimensions are in compliance with JEDEC Outline: MS-012 AA.

2. Dimension “D” does not include molding flash, protrusions or gate burrs.

3. Dimension “E” does not include inter-lead flash, or protrusions.

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.

Website: http://www.feeling-tech.com.tw

Rev. 0.9

10/10

FP133D-LF [FEELING]

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