ZXLD1321 Ver la hoja de datos (PDF) - Zetex => Diodes

Número de pieza

componentes Descripción

Fabricante

ZXLD1321

Boost mode DC-DC converter for LED driving with 1A output and current control

Zetex => Diodes 

ZXLD1321

High-side current monitor

Symbol

VM_VIN

VMON

IM_LOAD

TCO

(MON)

BW

Parameter

Supply voltage

Sense voltage

Input current

Temperature coefficient

Bandwidth

Gm

Transconductance

⌬Iout/⌬VMON

Acc

Accuracy

Conditions

Min Typ Max Units

3

18 V

=V(M_VIN) – V(M_LOAD) 0 100 200 mV

Measured into M_LOAD pin

0.08 1 µA

VMON=10mV

VMON=100mV

370

ppm/

150

K

VMON=10mV

VMON=100mV

350

KHz

2.5

MHz

1

mA/V

RM = 0.1Ω

-3

3

%

VMON = 100mV

Reference current monitor

Symbol

VADJ

TCO

(MON)

BW

Gm

Acc

Parameter

Adjust Voltage

Temperature Coefficient

Bandwidth

Transconductance

⌬Iout/⌬VADJ

Accuracy

Conditions

VADJ=50mV

VADJ=500mV

VADJ=50mV

VADJ=500mV

VADJ=500mV

Min Typ Max Units

0

500 mV

160

ppm/

200

K

275

KHz

3

MHz

200

µA/V

-3

3

%

LED thermal control circuit (TADJ) parameters

Symbol

VTADJH

Parameter

Upper threshold voltage

VTADJL

Lower threshold voltage

Gm(TADJ) Transconductance

⌬Iout/⌬VTADJ

Conditions

Min Typ Max Units

Onset of output current

75

mV

reduction (VTADJ falling)

Output current reduced to

50

mV

<10% of set value

(VTADJ falling)

4

mA/V

Issue 1 - January 2008

7

© Zetex Semiconductors plc 2008

www.zetex.com

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