TK11840LTL-G Ver la hoja de datos (PDF) - Toko America Inc

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TK11840LTL-G

Step-up DC-DC converter / white LED driver IC

Toko America Inc  

POWER&RF

6 WHITE LED DRIVER APPLICATION WITH ON/OFF CONTROL

„ Designed Performance

Input Voltage

LED Current

Oscillation Frequency

VIN=2.5 to 10.0V

ILED=20mA

260kHz

Inductor Peak Current 560mA

Coil (TOKO)

Type D52LC A914BYW-100M

„ List of common components

Parameter

Symbol Value Unit

Coil

L

10

µH

Input Capacitor

CIN

4.7

µF

Output Capacitor

COUT 2.2

µF

Short Circuit Protection Resistor

CSCP 0.1

µF

Bias Resistor

RB

2

kΩ

Time Capacitor

CT 270

pF

Time Resistor

RT

6.8

kΩ

Feedback Capacitor

CFB 0.1

µF

VOUT

TK11840L

1 Ealn

FB 8

CFB

CSCP

2 SCP

OSC 7

VIN

3 VCC

GND 6

CT RT

RB

4 BR/CTL

VOUT 5

Sw.Tr.

CTL

L

D

CIN

COUT

RLED

16 WHITE LED DRIVER APPLICATION

„ Designed Performance

Input Voltage

LED Current

Oscillation Frequency

VIN=12±1V

ILED=20mA+20mA

440kHz

Inductor Peak Current 300mA

Coil (TOKO)

Type D52LC A914BYW-470M

„ List of common components

Parameter

Symbol Value Unit

Coil

L

47

µH

Input Capacitor

CIN

4.7

µF

Output Capacitor

COUT

10

µF

Short Circuit Protection Resistor

CSCP 0.1

µF

Bias Resistor

RB

2

kΩ

Time Capacitor

CT 1000

pF

Time Resistor

RT

1

kΩ

Feedback Capacitor

CFB 0.1

µF

VOUT

CSCP

VIN.IC

RB

CIN.IC 1µF

TK11840L

1 Ealn

FB 8

2 SCP

OSC 7

3 VCC

4 BR/CTL

GND 6

VOUT 5

CFB

CT RT

Sw.Tr.

L

D

VIN

CIN

COUT

24Ω

24Ω

2005 SPRING

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