BD9486F Datasheet, PDF (3/37 Pages) Rohm – 1ch Boost up type White LED Driver for large LCD

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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TSZ02201-0F1F0C100240-1-2
13.Feb.2014 Rev.004