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BD18378EFV-ME2 Folha de dados(PDF) 1 Page - Rohm

Nome de Peças BD18378EFV-ME2
Descrição Electrónicos  Advanced 12 Channel Constant Current LED Driver IC
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BD18378EFV-ME2 Folha de dados(HTML) 1 Page - Rohm

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○Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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1/26
TSZ02201-0W1W0C500020-1-2
© 2015 ROHM Co., Ltd. All rights reserved.
04. Dec. 2015 Rev.004
TSZ22111・14・001
www.rohm.co
m
Advanced 12 Channel
Constant Current LED Driver IC
BD18378EFV-M
General Description
The BD18378EFV-M is a serial input controlled constant
current LED driver with 8 V output rating. 6 bit current
calibration is available for each output while a selected
PWM input performs dimming on the corresponding
output. The BD18378EFV-M is able to perform diagnostic
(open / short / temperature) checks to detect LED failure
and over temperature on chip. Fault detection is
performed also during LED deactivated state. The
settings of all internal registers can be read out to verify
written information at any time.
Features
 AEC-Q100 Qualified
(Note1)
 Current capability: 50mA per output channel.
 4-line SPI Control.
 External resistor current setting.
 Limp Home capability.
 PWM dimming 0.2-99.2% at 200Hz
 Diagnostic of all PWM inputs.
 Programmable output mapping to each PWM input.
 6 Bit LED brightness adjustment on each channel.
 Diagnostic output on LED OPEN and SHORT for
each channel during PWM on & off time.
 True LED voltage measurement.
 Over Temperature Protection and Thermal
Feedback.
 Open Drain Fault indicator.
 Read-back of all register settings.
 Outputs can be connected in parallel to achieve
more than 50mA into the load.
 Slew Rate limited switching reduces
radiated Noise (EMI).
 Daisy chain compatible.
(Note1: Operating Temperature Grade 2)
Key Specifications
 Input voltage range:
3V to 5.5V
 Output voltage range:
0.5V to 8V
 Output Current range:
10mA to 50mA
 Output Current accuracy
3.5%
 Maximum clock frequency:
1.25MHz
 Operating current:
4mA (Typ.)
 Operating temperature range:
- 40°C to +105°C
Package
L(Typ.) x W(Typ.) x H(Max.)
HTSSOP-B28
9.70mm x 6.40mm x 1.00mm
Applications
 Automotive illumination & ambient light
 Consumer electronics illumination
Typical Application Circuit Diagram
Figure 1. Typical application diagram
to Controller
BD18378EFV-M
Heat Sink
AGND
IREF
ERR
VCC
PGND
VLED
8V max
5.5V max
VCC
CIN
REXT
CLED
PWM
0
1
2
3
4
5
SDI CLK SDO LATCH
CHANNEL
0
1
2
3
4
10
5
6
7
8
9
11
SENSE
RP
LEDs
Quiet
ground line
Noisy
ground line


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