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PDF BD9415FS Data sheet ( Hoja de datos )
| Número de pieza | BD9415FS | |
| Descripción | White LED Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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LED Driver for LCD Backlights
White LED Driver for 4Ch Large LCD Panels
(DC/DC converter type)
BD9415FS
1.1 ●General Description
BD9415FS is a high efficiency driver for white LEDs and
designed for large LCDs. This IC has a built-in boost
DC/DC converter that employs an array of LEDs as the
light source. BD9415FS has various protection functions
against fault conditions, such as over-voltage protection
(OVP), over current limit protection of DC/DC (OCP),
short circuit protection (SCP), over duty protection
(ODP) and open detection of LED string. Therefore,
BD9415FS is available for the fail-safe design over a
wide range of output voltages.
Key Specifications
Operating power supply voltage： 11.5V to 35.0V
Oscillator frequency：
500kHz(RT=30kΩ)
Operating current：
6.2mA (Typ)
Operating temperature range： -40°C to +105°C
1.2 Package
SSOP-A32
W(Typ) x D(Typ) x H(Max)
13.60mm x 7.80mm x 2.01mm
Pin pitch 0.80mm
Features
4Ch LED constant current driver (external FET)
Built-in boost DC/DC converter (external FET)
PWM dimming (individual input terminal of 4ch)
Analog dimming (Linear) function
Low heat generation technology
LED protection function (Open/Short protection)
Output Short Protection (OCP)
Over Duty Protection (ODP)
Over Voltage Protection (OVP)
Under Voltage Lockout Protection (UVLO)
Auto restart function
Applications
TV, Computer Display, Notebook, LCD Backlighting.
Figure 1. SSOP-A32
Typical Application Circuit
+
VIN
VCC
REG90
STB
CVCC
CREG90
1 VCC
2 FAILB
3 UVLO
4 REG90
5 STB
6N
7 PGND
8 CS
9 DUTYON
10 OVP
11 S1
12 LED1
13 G1
14 S2
15 LED2
16 G2
AGND 32
SSFB 31
RT 30
DUTYP 29
PWM4 28
PWM3 27
PWM2 26
PWM1 25
LSP 24
VREF 23
G4 22
LED4 21
S4 20
G3 19
LED3 18
S3 17
PWM4
PWM3
PWM2
PWM1
REG90
Figure 2. Typical Application Circuit
○Product structure : Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product not designed protection against radioactive rays
1/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001
1 page  
BD9415FS
1.8 Electrical Characteristics 2/2 (Unless otherwise specified, VCC=24V, Ta=25°C)
Parameter
Symbol
【Over Voltage Protection (OVP) Block】
OVP Detect Voltage
VOVP
OVP Detect Hysteresis
VOVP_HYS
OVP Pin Leak Current
IOVP
【UVLO Block】
UVLO Unlock Voltage(VCC)
VUVLO_VCC
UVLO Hysteresis(VCC)
VUHYS_VCC
UVLO Unlock Voltage
VUVLO
UVLO Hysteresis
VUHYS
UVLO Input Resistance
RUVLO
【DUTYON Block】
DUTYON Pin HIGH Voltage
DTYON_H
DUTYON Pin LOW Voltage
DTYON_L
DUTYON Pin Pull Down
Resistance
RDTYON
【Over Duty Protection (ODP) Block】
PWM ODP Protection Detect
Duty
DODP
【Filter Block】
AUTO Timer
TAUTO
Abnormal Detection Timer
TCP
【LED Driver Block】
S Pin Voltage
VS
OPEN Detection Voltage
VOPEN
SHORT Detection Voltage
VSHORT
SHORT Mask Voltage
VREF Leak Current
【STB Block】
STB Pin HIGH Voltage
STB Pin LOW Voltage
STB Pull Down Resistance
【PWM Block】
PWM Pin HIGH Voltage
PWM Pin LOW Voltage
PWM Pin Pull Down Resistance
VSHORT
_MASK
IVREF
STBH
STBL
RSTB
VPWM_H
VPWM_L
RPWM
【FAILB Block(OPEN DRAIN)】
FAILB LOW Output Voltage
VFAILB_L
Min
2.91
50
-2
6.5
150
2.375
50
360
1.5
-0.3
180
-
-
-
196
294.6
392.8
491
0.12
5.6
2.8
-2
2.0
-0.3
0.5
1.5
-0.3
180
0.25
Typ
3.00
100
0
7.5
300
2.5
100
600
-
-
300
35
163
20
200
300
400
500
0.2
6.0
3.0
0
-
-
1.0
-
-
300
0.5
Max
3.09
200
2
8.5
600
2.625
150
840
18
0.8
420
-
-
-
204
305.4
407.2
509
0.28
6.4
3.2
2
18
0.8
1.5
18
0.8
420
1.0
Unit Condition
V VOVP=SWEEP UP
mV VOVP=SWEEP DOWN
µA VOVP=4.0V
V VCC=SWEEP UP
mV VCC=SWEEP DOWN
V VUVLO=SWEEP UP
mV VUVLO=SWEEP DOWN
kΩ VUVLO=4.0V
V
V
kΩ VDUTYON=3.0V
% FPWM=120Hz, DUTYP=341kΩ
ms FCT=800kHz
ms FCT=800kHz
VREF=1.0V
mV
VREF=1.5V
VREF=2.0V
VREF=2.5V
V VLED=SWEEP DOWN
V
VLED=SWEEP UP,
VLSP=0.895V
V VLED=SWEEP UP
µA VREF=3.0V
V
V
MΩ VSTB=3V
V
V
kΩ VPWM=3V
V IFAILB=1mA
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001
5 Page 
BD9415FS
3.1 Application Circuit Example
An example application using the BD9415FS.
3.1.1 Basic Application Example
+
REG90
STB
CVCC
CREG90
1 VCC
2 FAILB
3 UVLO
4 REG90
5 STB
6N
7 PGND
8 CS
9 DUTYON
10 OVP
11 S1
12 LED1
13 G1
14 S2
15 LED2
16 G2
AGND 32
SSFB 31
RT 30
DUTYP 29
PWM4 28
PWM3 27
PWM2 26
PWM1 25
LSP 24
VREF 23
G4 22
LED4 21
S4 20
G3 19
LED3 18
S3 17
PWM4
PWM3
PWM2
PWM1
VIN
VCC
REG90
Figure 10. Basic Application Example
3.1.2 Application Example of Unused CH
+
()
REG90
STB
CVCC
CREG90
LEDunused
1 VCC
2 FAILB
3 UVLO
4 REG90
5 STB
6N
7 PGND
8 CS
9 DUTYON
10 OVP
11 S1
12 LED1
13 G1
14 S2
15 LED2
16 G2
AGND 32
SSFB 31
RT 30
DUTYP 29
PWM4 28
PWM3 27
PWM2 26
PWM1 25
LSP 24
VREF 23
G4 22
LED4 21
S4 20
G3 19
LED3 18
S3 17
PWM4
PWM3
PWM2
PWM1
LEDunused
VCC
REG90
Figure 11. Application Example of Unused CH
When an LED terminal was unused, please dispose the unused CH as follows.
・Please input lower than 3.0V (typical) of voltage to a LEDx pin (ex. 1.0 to 2.0V).
・Gx pin, Sx pin is short
・Unused PWMx = L
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD9415FS.PDF ] | |
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