BD8381EFV-E2 Rohm Semiconductor, BD8381EFV-E2 Datasheet - Page 8
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BD8381EFV-E2
Manufacturer Part Number
BD8381EFV-E2
Description
LED Drivers AUTOMOTIVE GRADE LED DRIVER
Manufacturer
Rohm Semiconductor
Datasheet
1.BD8381EFV-E2.pdf
(21 pages)
Specifications of BD8381EFV-E2
Operating Supply Voltage
5 V to 30 V
Maximum Supply Current
7 mA
Maximum Power Dissipation
1.45 W
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
HTSSOP-28
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BD8381EFV-E2
Manufacturer:
ROHM Semiconductor
Quantity:
135
・LED Short Detection
●High luminance LED (multichip) with built-in LED of X piece in 1chip when using Y piece
●When using the single chip
© 2010 ROHM Co., Ltd. All rights reserved.
BD8381EFV-M
www.rohm.com
When the voltage between LEDR-pin and LEDC-pin ≥ 0.2 (TYP), the internal counter starts operating, and approximately
after 100ms (when FOSC = 300kHz) the operation latches off. With the PWM brightness control, the detecting operation is
processed only when PWMOUT-pin = High. If the condition of the detection operation is released before 100ms (when FOSC
= 300kHz), then the internal counter resets.
There is a possibility that the LED short detection malfunctions when the difference of Vf is large. Therefore, please adjust
external resistance for connected Vf. It is recommended 2V-3V to the input range of LEDR and LEDC.
※ The counter frequency is the DCDC switching frequency determined by the RT. The latch proceeds at the count of 32770.
Y piece
Y piece
PWMOUT
PWMOUT
FB
FB
piece
X
Fig. 15
Fig. 14
VOUT(DC/DC output)
VOUT(DC/DC output)
R
R
1
2
R
R
1
2
R
R
3
4
R
R
3
4
LEDR
LEDC
LEDR
LEDC
Setting method
R1:R2 = X:1
R3:R4 = ( X + 1 ) Y – 1:1
Setting method
R1:R2 = 1:1
R3:R4 = 2Y – 1:1
8/20
2010.10 - Rev.0.11
Technical Note