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ZXLD1350Q

AUTOMOTIVE COMPLIANT 350mA BUCK LED DRIVER

Diodes Incorporated. 

ZXLD1350Q

Electrical Characteristics (Test conditions: VIN = 12V, Tamb = +25°C, unless otherwise specified.)

Symbol

VSU

IINQoff

IINQon

Parameter

Internal Regulator Start-up Threshold

Quiescent Supply Current with Output Off

Quiescent Supply Current with Output Switching

VSENSE

Mean Current Sense Threshold Voltage

(Defines LED Current Setting Accuracy)

VSENSEHYS Sense Threshold Hysteresis

ISENSE ISENSE Pin Input Current

VREF Internal Reference Voltage

VREF/T

VADJ

VADJoff

VADJon

RADJ

ILXmean

RLX

ILX(leak)

DPWM(LF)

DPWM(HF)

Temperature Coefficient of VREF

External Control Voltage Range on ADJ Pin for DC

Brightness Control (Note 5)

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

Continuous LX Switch Current

LX Switch ‗On‘ Resistance

LX Switch Leakage Current

Duty Cycle Range of PWM Signal Applied to ADJ Pin

during Low Frequency PWM Dimming Mode

Brightness Control Range

Duty Cycle Range of PWM Signal Applied to ADJ Pin

during High Frequency PWM Dimming Mode

Brightness Control Range

Operating Frequency

fLX

(See Graphs for More Details)

Start Up Time

tSS

(See Graphs for More Details)

Condition

VIN rising

ADJ pin grounded

ADJ pin floating, f = 250kHz

Measured on ISENSE pin with

respect to VIN

VADJ = 1.25V

—

VSENSE = VIN -0.1

Measured on ADJ pin with pin

floating

—

—

VADJ falling

VADJ rising

—

—

—

—

PWM frequency <500Hz PWM

amplitude = VREF

Measured on ADJ pin

PWM frequency <10kHz PWM

amplitude = VREF

Measured on ADJ pin

ADJ pin floating

L = 100H (0.82V)

IOUT = 350mA @ VLED = 3.4V

Driving 1 LED

Time taken for output current to

reach 90% of final value after

voltage on ADJ pin has risen

above 0.3V.

Min.

—

—

—

95

—

—

1.21

—

0.3

0.15

0.2

135

—

—

—

0.01

—

0.16

—

—

—

Typ.

4.8

15

250

100

±15

1.25

1.25

50

—

0.2

0.25

—

—

1.5

—

—

100:1

—

5:1

250

500

Max. Unit

—

V

20

µA

500

µA

105

mV

—

%

10

µA

1.29

V

— ppm/°C

2.5

V

0.25

V

0.3

V

250

kΩ

0.37

A

2

Ω

1

µA

1

—

—

—

1

—

—

—

—

kHz

—

µs

Note:

5. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE threshold and output current

proportionally.

ZXLD1350Q

Document number: DS37076 Rev. 2 - 2

4 of 21

www.diodes.com

September 2017

© Diodes Incorporated

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