BD9415FS Datasheet, PDF (4/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

BD9415FS
1.6 Absolute Maximum Ratings (Ta=25°C)
Parameter
Power Supply Voltage
Symbol
VCC
Rating
Unit
-0.3 to +36
V
LED1-4
LED1, LED2, LED3, LED4
60
V
FAILB, STB, OVP,
FAILB, STB, OVP,
PWM1-4, UVLO, VREF, DUTYON
PWM1, PWM2, PWM3, PWM4,
20
V
UVLO, VREF, DUTYON
N, REG90, G1-4
N, REG90, G1, G2, G3, G4
13
V
S1-4, DUTYP, RT, SSFB, CS, LSP
S1, S2, S3, S4, DUTYP, RT,
SSFB, CS, LSP
7
V
Power Dissipation
Pd
0.95 *1
W
Operating Temperature Range
Topr
-40 to +105
°C
Junction Temperature
Tjmax
150
°C
Storage Temperature
Tstg
-55 to +150
°C
(*1) Derate by 7.6mW/°C when operating above Ta=25°C.. (Mounted on 1-layer 70mm x 70mm x 1.6mm board)
1.7 Recommended Operating Conditions (Ta=25°C)
Parameter
Symbol
Rating
Unit
Power Supply Voltage
DC/DC Oscillating Frequency
VCC
Fsw
11.5 to 35.0
V
100 to 1000^(*1)
kHz
VREF Input Voltage
VREF
0.2 to 2.5
V
LSP Input Voltage
VLSP
0.8 to 3.0
V
PWM Input Frequency
FPWM
90 to 2000
Hz
The operating ranges above are acquired by evaluating the IC separately. Please take care when using the IC in
applications.
(*1) When driving external FET as DC/DC, be careful about the input capacity of the FET being used.
1.8 Electrical Characteristics 1/2 (Unless otherwise specified, VCC=24V, Ta=25°C)
Parameter
Symbol
【Total Current Consumption】
Min
Typ
Max Unit
Circuit Current
ICC
-
6.2 12.4 mA
Standby Current
【Switching Block】
N Pin Source ON Resistance
N Pin Sink ON Resistance
【REG90 Block】
REG90 Output Voltage
REG90 Available Current
IST
RONH
RONL
REG90
IREG90
-
14
25
μA
-
2.5 3.75
Ω
-
3.0
4.5
Ω
8.91 9.0 9.09
V
20
-
-
mA
REG90_UVLO Detect Voltage REG90_TH
4.7
5.4
6.1
V
【Over Current Limit Protection (OCP) Block】
OCP Detect Voltage
VOCP
0.405 0.450 0.495
V
【Error Amplifier Block】
Error Amplifier Base Voltage
VERR
0.7
0.8
0.9
V
SSFB Source Current
(Soft Start)
ISSFBSO_S
-13
-10
-7
μA
SSFB Sink Current
ISSFBSINK
80
100 120
μA
SSFB source Current
【CT Oscillator Block】
ISSFBSOUR -115 -100 -85
µA
Oscillation Frequency
FCT
440 500 560 kHz
MAX DUTY
DUTY_MAX
91
95
99
%
【Short Circuit protection (SCP) detect Block】
SCP Detect Voltage
VSCP
0.05 0.20 0.35
V
Condition
VSTB=3.0V, LED1-4=2V,
RT=30kΩ
VSTB=0V
ION=-10mA
ION=10mA
IO=0mA
VREG=SWEEP DOWN,
VSTB=0V
VCS=SWEEP UP
VREF=1.5V
VSSFB=2V
LED=2.0V、VSSFB=1.0V
LED=0V、VSSFB=1.0V
RRT=30kΩ
VOVP=SWEEP DOWN
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TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001