ZXLD1320 Ver la hoja de datos (PDF) - Diodes Incorporated.

Número de pieza

componentes Descripción

Fabricante

ZXLD1320

Buck mode DC-DC converter for LED driving with 1.5A output and current control

Diodes Incorporated. 

ZXLD1320

Electrical characteristics (Test conditions: VIN = 4V, TAMB= 25°C unless otherwise stated(a))

DC-DC converter supply parameters

Symbol

VIN

Iq

ISTBY

VREF

TCO(REF)

Parameter

Conditions

Min

Supply voltage

Normal operation 4.0

Quiescent current

Measured into VIN

ADJ pin floating.

(Excluding switch

base current).

Standby current

Measured into VIN.

ADJ pin grounded

Internal reference voltage

ADJ pin floating

480

2.0V<VIN<18V

Internal reference temperature

coefficient.

Typ Max Units

18

V

1.5

mA

12 20 µA

500 520 mV

50

ppm

/K

NOTES:

(a) Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified from -40°C to

+125° Care guaranteed by design, characterisation and process control.

DC-DC converter input parameters

Symbol Parameter

Conditions

Min Typ Max Units

VSENSE

Peak switch current sense

voltage

Measured on ISENSE 45 55 65 mV

pin CFB pin at 0V

ISENSE

Sense input current

Measured into

-15 -7

ISENSE with pin at

0V.

CFB pin at 0V

-1 µA

CFB

Control loop compensation

capacitor

10

nF

VADJ

External dc control voltage

DC brightness

50

applied to ADJ pin to adjust control mode

output current

500 mV

VADJ(th)

Switching threshold of ADJ pin Standby state to

normal operation

26 28 30 mV

TCO(VADJ) Temperature coefficient of

VADJ(th)

+0.3

%/K

RADJ

Internal resistor between VREF VADJ<500mV

and ADJ

100

kΩ

VADJ(clmp) Internal clamp voltage on ADJ 100µA injected into

575

mV

pin

ADJ pin

Issue 1 - January 2008

5

© Zetex Semiconductors plc 2008

www.zetex.com

Share Link: