ZXLD1356QET5TA(2012) Просмотр технического описания (PDF) - Diodes Incorporated.

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производитель

ZXLD1356QET5TA
(Rev.:2012)

60V 550mA LED DRIVER and AUTOMOTIVE GRADE

Diodes Incorporated. 

A Product Line of

Diodes Incorporated

ZXLD1356/ ZXLD1356Q

Electrical Characteristics (VIN = 24V, @TAMB = +25°C, unless otherwise specified.)

Symbol

Parameter

Condition

Min

Typ

Max Unit

VSU

VSD

IINQoff

IINQon

Internal regulator start-up threshold

Internal regulator shutdown threshold

Quiescent supply current with output off

Quiescent supply current with output switching

(Note 6)

ADJ pin grounded

ADJ pin floating, L = 68mH,

3 LEDsf = 360kHz

4.85

5.2

V

4.40 4.75

V

65

108 µA

1.6

mA

VSENSE

VSENSEHYS

ISENSE

VREF

Mean current sense threshold voltage

(Defines LED current setting accuracy)

Sense threshold hysteresis

ISENSE pin input current

Internal reference voltage

Measured on ISENSE pin with respect

195

to VIN VADJ = 1.25V; VIN = 18V

VSENSE = VIN -0.2

Measured on ADJ pin with pin

floating

200

±15

4

1.25

205 mV

%

10

µA

V

ΔVREF/ΔT

VADJ

VADJoff

VADJon

RADJ

Temperature coefficient of VREF

External control voltage range on ADJ pin for

DC brightness control (Note 7)

DC voltage on ADJ pin to switch device from

active (on) state to quiescent (off) state

DC voltage on ADJ pin to switch device from

quiescent (off) state to active (on) state

Resistance between ADJ pin and VREF

0.3

VADJ falling

0.15

VADJ rising

0< VADJ < VREF, VADJ > VREF +100mV

0.2

30

10.4

50

0.20

0.25

50

14.2

ppm/°C

2.5

V

0.27

V

0.3

V

65

18.0

kΩ

ILXmean

Continuous LX switch current

0.55

A

RLX

LX switch ‘On’ resistance

@ ILX = 0.55A

0.5

0.75 Ω

ILX(leak)

LX switch leakage current

5

µA

DPWM(LF)

Duty cycle range of PWM signal applied to ADJ

pin during low frequency PWM dimming mode

Brightness control range

PWM frequency <300Hz PWM

amplitude = VREF

Measured on ADJ pin

0.001

1

1000:1

DCADJ(*)

DC Brightness control range

Note 8

5:1

Start up time

tSS

(See graphs for more details)

Time taken for output current to reach

90% of final value after voltage on

ADJ pin has risen above 0.3V.

2

ms

Requires external capacitor 22nF.

Operating frequency

fLX

(See graphs for more details)

ADJ pin floating L= 68mH (0.36V)

IOUT = 0.55A @ VLED = 3.6V

Driving 3 LEDs

360

kHz

fLXmax

Recommended maximum operating frequency

500 kHz

Notes:

6. Static current of device is approximately 700 µA, see Graph, Page 17.

7. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE. threshold and output current

proportionally.

8. Ratio of maximum brightness to minimum brightness before shutdown VREF =1.25/0.25. VREF externally driven to 2.5V, ratio 10.1.

ZXLD1356/ ZXLD1356Q

Document number: DS33470 Rev. 4 - 2

5 of 29

www.diodes.com

October 2012

© Diodes Incorporated

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