BD8118FM Datasheet, PDF (1/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

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STRUCTURE
PRODUCT NAME
TYPE
FEATURES
Silicon Monolithic Integrated Circuit
White LED driver for car navigation back light
BD８１1８FM
・Step-up DC/DC converter
・Built in UVLO
Built in OSC
・Built in OVP
・4 parallel current output （output current is set with external resister）
・LED open detection circuit
・Built in TSD
・PWM adjustment
・Built in OCP
・FAIL output (self diagnosis)
●ABSOLUTE MAXIMUM RATINGS (Ta=25℃)
PARAMETER
SYMBOL
LIMITS
UNIT
Power supply voltage(Pin : 1）
VCC
36
V
Load switch output voltage(Pin : 2）
VLOADSW
36
V
LED output voltage(Pin : 12, 14, 15, 17)
VLED
36
V
FAIL output voltage(Pin : 3, 20)
VOL
7
V
Input voltage(Pin : 5, 6, 10, 11, 24)
VIN
-0.3～7 < VCC
V
VDAC input voltage(Pin : 8)
Power dissipation
VDAC
-0.3～7 < VCC
V
Pd
2.20 ^※1
W
Junction Temperature
Tjmax
150
℃
Operating temperature range
Topr
-40～+95
℃
Strage temperature range
Tstg
-55～+150
℃
LED drive current(Pin : 12, 14, 15, 17)
ILED
150 ^{※2※3}
mA
※1 70mm×70mm×1.6mm glass epoxy mounting. Decline by 17.6mw/℃
※2 It is correlate LED drive current with VF dispersion each of current outputs. Refer to the technical note.
※3 Current maximum for 1ch. Do not however exceed Pd.
●Operating range(Ta=25℃)
PARAMETER
SYMBOL
LIMITS
UNIT
Power Supply Voltage（Pin : 1）
VCC
4.5～30
V
Oscillation frequency(Pin : 26)
FOSC
50～550
kHz
External synchronous frequency(Pin : 6) ^{※4 ※5}
FSYNC
fosc～550
kHz
External synchronous pulse(Pin : 6)
FSDUTY
40～60
%
※4 SYNC have to be connected to GND when external synchronizing frequency is not needed.
※5 Don’t change external synchronous frequency to internal oscillation frequency when external synchronous frequency is inputted.
* This product is not designed for protection against radioactive rays.
REV. A