ZLED7000 datasheet(6/18 Pages) IDT

6 / 18 page

ZLED7000 Datasheet

April 20, 2016

No.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

1.3.7

External control voltage

range on ADJ pin for DC

brightness control

VADJ

0.3

1.2

1.3.8

DC voltage on ADJ pin to

switch chip from active (ON)

state to quiescent (OFF)

state

VADJoff

VADJ falling

0.15

0.2

0.25

1.3.9

DC voltage on ADJ pin to

switch chip from quiescent

(OFF) state to active (ON)

state

VADJon

VADJ rising

0.2

0.25

0.3

1.3.10

Resistance between ADJ

pin and VREF

RADJ

500

kΩ

1.3.11

Continuous LX switch

current

ILXmean

0.65

0.75

1.3.12

LX switch leakage current

ILX(leak)

μA

1.3.13

LX Switch ON resistance

RLX

0.9

1.5

Ω

1.3.14

Brightness control range at

low frequency PWM signal

DPWM(LF)

PWM frequency =100Hz

PWM amplitude=5V,

VIN=15V, L=27

μH, driving

1 LED

1200:1

1.3.15

Brightness control range at

high frequency PWM signal

DPWM(HF)

PWM frequency =10kHz

PWM amplitude=5V,

VIN=15V, L=27

μH, driving

1 LED

13:1

1.3.16

Operating frequency

fLX

ADJ pin floating L=100μH

(0.82Ω) IOUT=350mA @

VLED=3.4V, driving 1 LED

154

kHz

1.3.17

Minimum switch ON time

TONmin

LX switch ON

200

1.3.18

Minimum switch OFF time

TOFFmin

LX switch OFF

200

1.3.19

Recommended maximum

operating frequency

fLXmax

MHz

1.3.20

Recommended duty cycle

range of output switch at

fLXmax

DLX

0.2

0.8

1.3.21

Internal comparator

propagation delay

TPD

1.3.22

Thermal shutdown

temperature

TSD

140

°C

1.3.23

Thermal shutdown

hysteresis

TSD-HYS

°C

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