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PDF BD18377EFV-M Data sheet ( Hoja de datos )
| Número de pieza | BD18377EFV-M | |
| Descripción | 12 Channel Constant Current LED Driver IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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12 Channel Constant Current
LED Driver IC
BD18377EFV-M
●General Description
The BD18377EFV-M is a serial input controlled
constant-current LED driver with 10V output rating. 6 bit
current calibration is available for each output while a
global PWM performs dimming on all outputs
simultaneously. The BD18377EFV-M is able to perform
diagnostic (open / short load / temperature) checks to
detect LED failure and over temperature on chip. The
settings of all internal registers can be read out to verify
written information at any time.
●Key Specifications
Input voltage range:
3.0V to 5.5V
Output voltage range:
0.5V to 10V
Output Current range/channel:
15mA to 50mA
Output Current accuracy at 30mA: 3.5% (Typ.)
Min PWM ON Time:
5uS
Maximum circuit current:
5mA
Maximum clock frequency:
1250KHz
Operating temperature range: -40℃ to +105℃
●Features
AEC-Q100 Qualified (Note1)
Constant current output of up to 50mA per
output channel.
4-line Serial Control + Enable Signal.
PWM dimming 0.1-100% global.
6 Bit LED brightness adjustment on each channel.
Diagnostic output on LED OPEN and SHORT for
each channel.
Over Temperature Protection and thermal
feedback.
Read-back of all register settings.
Outputs may be connected in parallel to achieve
more than 50mA into the load.
Slew limited switching reduces conducted and
radiated Noise (EMI).
Daisy chain compatible with BD18377EFV-M
and/or BD8377FV-M (12ch LED driver IC).
(Note1: Operating Temperature Grade 2)
●Package
HTSSOP-B20
W(Typ.) x D(Typ.) x H(Max.)
6.50mm x 6.40mm x 1.00mm
Figure 1. HTSSOP-B20 Package
●Applications
Automotive illumination
Consumer electronics illumination
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
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19.APR.2016 Rev.005
1 page  
BD18377EFV-M
●Absolute Maximum Ratings
Item
Power Supply Voltage
Output Voltage (Pin No: 3~8, 13~18)
Input Voltage (Pin No: 2, 9, 10, 12, 19)
Operating Temperature Range
Storage Temperature Range
Junction Temperature
Drive Current
Electrostatic-Discharge Capability Human
Model
Body
Electrostatic-Discharge Capability Machine Model
Symbol
VCC
VDmax
VIN
TOPR
TSTG
TJmax
IDmax
ESDHBM
ESDMM
Value
7
10
-0.3 to VCC
-40 to +105
-55 to +150
150
60
2000
200
Datasheet
Unit
V
V
V
°C
°C
°C
mA
V
V
●Recommended Operating Ratings (Ta = 25°C)
Item
Power Supply Voltage
Drive Current at 100% brightness
Symbol
VCC
ID
Standard Value
Min Typ
Max
3.0 -
5.5
15 30
50
Unit
V
mA
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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5 Page 
BD18377EFV-M
Datasheet
Protection Circuitry
Types of POR
In the BD18377 a POR event can occur for one of three reasons:
• Low supply voltage which will occur due to either startup or UVLO.
• When the die temperature exceeds 150°C
• When the controller sends a command
These three situations are discussed below.
POR at Startup or UVLO
At startup, which is defined here as first application of supply voltage VCC, or when VCC < UVLO (UVLO refers to Under
Voltage Lock Out), a POR event (Power ON Reset) will occur. The expected behavior is shown in Table 1.
In this case the analog circuits are UNDEFINED and therefore the reported status of the diagnostics registers (TSD150,
TSD125, SHORT_FLAG, OPEN_FLAG, SHORT and OPEN) is UNDEFINED. It is mandatory to use the command
[SOFTWARE RESET].
During RESET:
• The device cannot receive data
• The SEROUT is held active LOW, so the device cannot transmit data
Therefore communication between the controller and the device is lost during a POR. Any data transmitted during this period
will be lost. Since SEROUT is held low, the controller must send, and receive, any command that is NOT 0000 to confirm
communication is active.
The state machine inside the digital is undefined and the device will recognize the first two bits it receives as “00”. It is
therefore recommended to send a dummy byte or a dummy command at startup to put the device into a known state before
beginning of programming.
When the POR is released, the MASK, CAL, MASK LOCK, CAL LOCK and SHORT_MASK registers will have their default
values as shown in Table 1. These values will put the device into a safe state.
The POR flag in the STATUS register is set HIGH, so the event is visible to the controller on the next [READ STATUS]
command. The POR flag can be reset by the command [RESET_POR].
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/28
TSZ02201-0W1W0C500020-1-2
19.APR.2016 Rev.005
11 Page | ||
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| PDF Descargar | [ Datasheet BD18377EFV-M.PDF ] | |
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