ZXLD1356Q

Document number: DS37077 Rev. 2 - 2

4 of 28

www.diodes.com

October 2015

© Diodes Incorporated

ZXLD1356Q

Q

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Internal Regulator Start-Up Threshold

—

—

4.85

5.2

V

Internal Regulator Shutdown Threshold

—

4.40

4.75

—

V

Quiescent Supply Current With Output Off

ADJ Pin Grounded

—

65

108

µA

Quiescent Supply Current With Output Switching

(Note 7)

ADJ Pin Floating, L = 68mH,

3 LEDsf = 360kHz

—

1.6

—

mA

Mean Current Sense Threshold Voltage

(Defines LED Current Setting Accuracy)

195

200

205

mV

Sense Threshold Hysteresis

—

—

±15

—

%

—

4

10

µA

Internal Reference Voltage

Measured on ADJ Pin with Pin

Floating

—

1.25

—

V

—

—

50

—

ppm/°C

External Control Voltage Range on ADJ Pin for

DC Brightness Control (Note 8)

—

0.3

—

2.5

V

DC Voltage on ADJ Pin to Switch Device from

Active (on) State to Quiescent (OFF) State

0.15

0.20

0.27

V

DC Voltage on ADJ pin to switch device from

quiescent (OFF) State to Active (ON) State

0.2

0.25

0.3

V

30

10.4

50

14.2

65

18.0

kΩ

Continuous LX Switch Current

—

—

—

0.55

A

LX Switch

‘On’ Resistance

—

0.5

0.75

Ω

LX Switch Leakage Current

—

—

—

5

µA

Duty Cycle Range of PWM Signal Applied to

ADJ Pin During Low Frequency PWM Dimming

Mode

PWM Frequency <300Hz PWM

Measured on ADJ Pin

0.001

—

1

—

Brightness Control Range

—

1,000:1

—

—

(*)

DC Brightness Control Range

(Note 9)

—

5:1

—

—

Start-Up Time

(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

Requires external capacitor 22nF

—

2

—

ms

Operating Frequency

(See Graphs for More Details)

ADJ Pin Floating L= 68mH (0.36V)

Driving 3 LEDs

—

360

—

kHz

Notes:

7. Static current of device is approximately 700µA, see Supply Current Graph, Page 15.

proportionally.