BD9415FS Datasheet, PDF (1/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

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
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TSZ22111・14・001
○This product not designed protection against radioactive rays
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TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001