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BD9397EFV Datasheet, PDF (1/30 Pages) Rohm – White LED Driver for large LCD panel | |||
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Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
panel
BD9397EFV
âGeneral Description
BD9397EFV is a high efficiency driver for white LEDs
and designed for large LCD panel. This IC is built-in
high current drive and high responsibility type 6ch LED
drivers and 1ch boost DCDC converter. BD9397EFV
has some protect function against fault conditions,
such as the over-voltage protection (OVP), LED OPEN
and SHORT protection, the over current limit
protection of DCDC (OCP). Therefore BD9397EFV is
available for the fail-safe design over a wide range
output voltage.
âKey Specification
ï® Operating power supply voltage range: 9.0V to 35.0V
ï® Oscillator frequency:
500kHz (RT=30kâ¦)
ï® Operating Current:
9mA (typ.)
ï® Operating temperature range:
-40°C to +85°C
âApplications
TV, Computer Display, Notebook, LCD Backlighting
âTypical Application Circuit
Vin
Cin
VCC VCC
STB
CVCC
FAIL_MODE
FAIL_RST
RT
SS
REG9V UVLO
VREG
UVLO
(VCC)
UVLO TSD
OVP SCP
OSC
SS
PROTECTION
Logic
PWM
COMP
++
-
-
Control
Logic
Filter
REG9V
Current
Sense
DRIVER
REG9V
OVP
FAIL
CP
N
PGND
CS
FB
RFB
CFB
LED_LV
REG9V
LSP
ERR
AMP -
--
-
-
+
OPEN/SHORT
Detect
M_DET
LED1
+
-
S1
+Cout
VREF
1/5
+
-
PWMï¼
PWM6
AGND
AGND
LED6
+
-
S6
N.C.
Figure 1. Typical Application Circuit
âFeatures
â 6ch Constant LED drivers, available 400mA drive
per 1ch.
â Constant current accuracy ±1.8% (IC only)
â Each 6ch external PWM inputs can control independent
dimming .
â Current analog (linear) dimming by VREF
â 1ch boost controller with current mode (external FET)
â Several protection functions
DCDC part : OCP/OVP/UVLO/TSD
LED driver part :OPEN,SHORT detection
â SHORT detection voltage is set by LSP terminal.
â Error detection output FAIL terminal inside
(normal=Open, error=Drain)
âPackage
HTSSOP-B40
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
13.60mm x 7.80mm x 1.00mm
0.65mm
Figure 2. HTSSOP-B40
âProduct structureï¼Silicon monolithic integrated circuit âThis product has not designed protection against radioactive rays
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
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