ZXLD1320DCATC 데이터 시트보기 (PDF) - Diodes Incorporated.

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ZXLD1320DCATC

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

Diodes Incorporated. 

ZXLD1320

High-side current monitor

Symbol

VMVIN

VMON

IM_LOAD

TCO

(MON)

BW

Parameter

Supply voltage

Sense voltage

Input current

Temperature coefficient

Bandwidth

Gm

Transconductance

⌬Iout/⌬VMON

Acc

Accuracy

Conditions

Min

4

=V(IN) – V(M_LOAD)

0

Measured into M_LOAD pin

VMON=10mV

VMON=100mV

VMON=10mV

VMON=100mV

Typ

100

0.08

370

150

350

2.5

1

Max Units

18 V

200 mV

1 µA

ppm/

K

KHz

MHz

mA/V

RM = 0.1Ω

VMON = 100mV

-3

3

%

Reference current monitor

Symbol

VADJ

TCO

(MON)

BW

Parameter

Adjust voltage

Temperature coefficient

Bandwidth

Gm

Transconductance

⌬Iout/⌬VADJ

Acc

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

reduction (VTADJ falling)

75

mV

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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