ECL2119|PWM Control Step-Up DC/DC Converter

ECL2119|PWM Control Step-Up DC/DC Converter


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​​ PWM Control Step-up DC/DC Converter

ECL2119

 

 

 

General Description

The ECL2119 ​​ Series ​​ is ​​ a fixed ​​ frequency, ​​ constant ​​ current step-up ​​ DC/DC ​​ converter ​​ ideal ​​ for ​​ driving ​​ OLED. ​​ Output voltage ​​ of ​​ up ​​ to ​​ 22V ​​ can ​​ be ​​ derived, ​​ and ​​ from ​​ a ​​ li-ion battery supply ,the output voltage can be 12V drive OLED. A 2 ohm resistance of NMOS is integrated in the circuit , withstand voltage can support 22V, with a small SOT23-5 package saves PCB space and BOM cost.

 

Features

Input voltage range  ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 2.7V—5.5V

Output voltage range  ​​ ​​ ​​ ​​ ​​​​ up to 22V

Oscillation frequency  ​​ ​​ ​​ ​​ ​​​​ 1.0MHz±20%

Efficiency  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 88%

Control  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ PWM control

Stand-by Current  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ ISTB=1.0uA(MAX)

Load capacitor  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 10uF,ceramic

LX limit Current  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 600mA

 

Applications

Mobil phones, PHS

PDAs

Digital still cameras

 

Package

SOT23-5L

 

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

 

Note: R1 and R2 can be adjusted by the voltage of VOUT and FB Pin; (when vout is equal to 12V,recommended resistor R1 = 875K, R2 = 100K,CP=100pF)

 

 

 

 

 

 

 

Ordering Information

ECL2119 X ​​ XX ​​ X

Embossed Tape :

RStandard Feed

SReverse Feed

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Package Type

Denotes Oscillation Frequency:

B:1.0MHZ

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ B2SOT23-5L

 

 

 

Marking Information

Part No

Package

Mark

Information

ECL2119BB2X

SOT23-5L

 

 

 

 

 

 

 

 

 

 

  • ECL2119=Z

  • The output voltage of FB pin (V):C=1.23

  • ​​ Package Type :3

  • ​​ Assembly lot No:

0-9,A-Z; 0-9,A-Z mirror writing,repeated(G,I,J,O,Q,W exception)

 

 

Pin Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Number

Pin Name

Function

1

LX

Switch

2

VSS

Ground

3

FB

Voltage Feedback

4

CE

Chip Enable

5

VIN

Power Input

 

 

 

 

 

 

 

 

 

 

 

Function Block Diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Absolute Maximum Ratings

Item

Symbol

Absolute maximum ratings

Unit

VIN Pin Voltage

VIN

Vss-0.3~Vss+7

V

LX Pin Voltage

VLX

Vss-0.3~Vss+22

FB Pin Voltage

VFB

Vss-0.3~Vss+7

V

CE Pin Voltage

VCE

Vss-0.3~Vss+7

V

LX Pin Current

ILX

600

mA

Power Dissipation

PD

SOT23-5

250

mW

Operating Temperature range

Topr

-40~+85

Storage Temperature range

Tstg

-55~+125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Characteristics Ta=25℃, unless otherwise noted

Item

Symbol

Condtion

Min.

Typ.

Max.

Unit

Circuits

FB Control Voltage

VFB

-

1.205

1.23

1.255

V

1

Output Voltage range

VOUT

-

VIN

-

22

Lx Operating Voltage

range

VLX

 

-

-

22

Operating Voltage range

VIN

 

2.5

-

6

Stand-by Current

ISTB

VCE=0V、VLX=5V

 

1

uA

3

Supply Current 1

IDD1

 

500

1200

1500

uA

2

Supply Current 2

IDD2

VIN=VLX、VFB=2V

90

 

3

Oscillation Frequency

FOSC

 

0.8

1.0

1.2

MHz

2

Maximum Duty Cycle

MAXDTY

VCONT=0.4V

 

75

 

%

2

Efficiency

EFFI

VIN=3.6V;RLED=20Ω

88

1

Current Limit

ILIM

VIN=3.6

 

600

 

mA

4

LX On Resistance

 

VIN=3.6V、VLX=0.4V

 

2.0

 

Ω

2

LX Leak Current

ILXL

 

 

0

1

uA

3

CE ‘H’ Voltage

VCEH

 

1.1

 

 

V

2

CE ‘L’ Voltage

VCEL

 

 

 

0.6

V

2

CE ‘H’ Current

ICEH

VIN=VLX、VFB=0.4V

 

 

0.1

uA

3

CE ‘L’ Current

ICEL

VCE=0V、  VLX=5V

 

 

-0.1

uA

3

FB ’H’ Current

ICEH

VIN=VLX、VFB=0.4V

 

 

0.1

uA

3

FB ’L’ Current

ICEL

VCE=0V、  VLX=5V

 

 

-0.1

uA

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Circuits

 

Typical Performance Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Package Information

SOP23-5L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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The Rules Are Rigid, The Design Is Alive
We Provide Flexible And Flexible Customized Ic And Module Design

Tell Us What Product Project You Want To Do!

The Rules Are Rigid, The Design Is Alive
We Provide Flexible And Flexible Customized Ic And Module Design

Tell Us What Product Project You Want To Do!