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BD9486F

1ch Boost up type White LED Driver for large LCD

ROHM Semiconductor 

BD9486F

Datasheet

●1.8 Electrical Characteristics (Unless otherwise specified, Ta=25°C，VCC=12V)

Parameter

Symbol

Limit

Unit

Min. Typ. Max.

【Total Current Consumption】

Circuit Current

Icc

－

2.6

5.2

mA

Circuit Current (standby)

【UVLO Block】

Operation Voltage（VCC）

Hysteresis Voltage（VCC）

UVLO Release Voltage

UVLO Hysteresis Voltage

UVLO Pin Leak Current

【DC/DC Block】

ISENSE Threshold Voltage 1

ISENSE Threshold Voltage 2

ISENSE Threshold Voltage 3

IST

－

40

80

μA

VUVLO_VCC 6.5

7.5

8.5

V

VUHYS_VCC 150

300

600

mV

VUVLO

2.88 3.00 3.12

V

VUHYS

250

300

350

mV

UVLO_LK

-2

0

2

μA

VLED1

VLED2

VLED3

0.225 0.233 0.242

V

0.656 0.667 0.677

V

0.988 1.000 1.012

V

ISENSE Clamp Voltage

VLED4

0.989 1.015 1.040

V

Oscillation Frequency

RT Short Protection Range

RT Terminal Voltage

RT Pin ON Resistance at OFF

FCT

RT_DET

VRT

RRT_L

142.5 150 157.5 KHz

-0.3

-

VRT

×90%

V

1.6

2.0

2.4

V

-

2.0

4.0

kΩ

GATE Pin MAX DUTY Output

MAX_DUTY

90

95

99

%

GATE Pin ON Resistance

(as source)

RONSO

2.5

5.0 10.0

Ω

GATE Pin ON Resistance

(as sink)

RONSI

2.0

4.0

8.0

Ω

SS Pin Source Current

ISSSO

-3.75 -3.0 -2.25 μA

SS Pin ON Resistance at OFF

RSS_L

-

3.0

5.0

kΩ

Soft Start Ended Voltage

VSS_END

3.52 3.70 3.88

V

FB Source Current

IFBSO

-115 -100 -85

μA

FB Sink Current

IFBSI

85

100 115

μA

OCP Detect Voltage

VCS

360

400

440

mV

OCP Latch Off Detect Voltage

VCS

0.85 1.00 1.15

V

【DC/DC Protection Block】

OVP Detect Voltage

VOVP

2.88 3.00 3.12

V

OVP Detect Hysteresis

OVP Pin Leak Current

VOVP_HYS 150

200

250

mV

OVP_LK

-2

0

2

μA

Condition

VSTB=3.0V, PWM=3.0V,

GATE=L,IREG50=0mA

VSTB=0V

VCC=SWEEP UP

VCC=SWEEP DOWN

VUVLO=SWEEP UP

VUVLO=SWEEP DOWN

VUVLO=4.0V

VADIM=0.7V

VADIM=2.0V

VADIM=3.0V

VADIM=3.3V

(at masked analog dimming)

RT=100kΩ

RT=SWEEP DOWN

RT=100kΩ

At latch off

RT=100kΩ

VSS=2.0V

SS=SWEEP UP

VISENSE=0.2V, VADIM=3.0V,

VFB=1.0V

VISENSE=2.0V, VADIM=3.0V,

VFB=1.0V

CS=SWEEP UP

CS=SWEEP UP

VOVP SWEEP UP

VOVP SWEEP DOWN

VOVP=4.0V, VSTB=3.0V

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TSZ22111・15・001

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TSZ02201-0F1F0C100240-1-2

13.Feb.2014 Rev.004

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