PPMIC BU

www.belling.com.cn

BL9582 Rev 1.2

Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited

2/2010

©2010 Belling All Rights Reserved

4

BL9582

32V, 1.4A Step-down

High Brightness LED Driver with Internal Switch

Electrical Characteristics

(Note 6)

Symbol

Parameter

Conditions

MIN

TYP

MAX

Unit

Input voltage

6

32

V

Under voltage lock out

5.07

V

UVLO hysteresis

4.87

V

Quiescent supply current with

output off

ADJ Pin grounded

50

100

μA

Quiescent supply current with

output switching

ADJ Pin floating

f=250KHz

1.8

50

mA

Mean current sense

threshold voltage

96

100

104

mV

Sense threshold hysteresis

±15

%

1.2

10

μΑ

ADJ pin floating voltage

ADJ pin floating

5

V

ADJ pin leakage current

ADJ pin grounded

5

μΑ

ADJ pin pull up resistor to

internal supply voltage

1

M

Ω

DC voltage on ADJ pin to

switch device from active (on)

state to quiescent (off) state

0.15

0.2

0.25

V

DC voltage on ADJ pin to

switch device from quiescent

(off) state to active (on) state

0.2

0.25

0.3

V

Digital dimming ADJ pin

input voltage high

1.5

V

Digital dimming ADJ pin

input voltage low

0.2

V

DC brightness control

0.3

1.2

V

Recommended Digital

dimming frequency

0.1

20

kHz

Duty cycle range of PWM

signal applied to ADJ pin

during low frequency

PWM dimming mode

0.1

100

%

Brightness control range

1000:1

Duty cycle range of PWM

signal applied to ADJ pin

during high frequency

PWM dimming mode

5

100

%

Brightness control range

20:1

LX switch on resistance

0.35

0.7

Ω

LX switch leakage

0.1

5

μΑ