BD8381EFV-E2 Rohm Semiconductor, BD8381EFV-E2 Datasheet - Page 16
![no-image](/images/manufacturer_photos/0/5/572/rohm_semiconductor_sml.jpg)
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
●Power consumption calculation
<Calculation example>
© 2010 ROHM Co., Ltd. All rights reserved.
BD8381EFV-M
www.rohm.com
Pc(N) = ICC*VCC +
ICC : Current of the maximum circuit
VCC :Power-supply voltage
Ciss : External FET capacity
Vsw : SW gate voltage
Fsw : SW frequency
F
When assuming
Pc(4) = 10mA × 30V + 500pF × 5V × 300kHz × 5V×2×2+
Pc = about 300mW.
Pd=2200mW (968mW) : Density of the board copper foil 3%
Pd=3200mW (1408mW): Density of the board copper foil 34%
Pd=3500mW (1540mW): Density of the board copper foil 60%
it becomes
PWM
4
3
2
1
0
Note1:The value of Power consumption : on glass epoxy board measuring 70mm×70mm×1.6mm
Note2:The value changes depending on the density of the board copper foil.
: PWM frequency
(3) 3.12W
(2) 2.77W
(1) 1.88W
(1 layer board/Copper foil thickness 18μm)
25
However, this value is an actual measurement value and no guarantee value.
2
1
Ambient temperature Ta[℃]
50
*Ciss*VREG*Fsw*VREG×2×2+
(1) θja=66.5℃/W (Density of board copper foil3%)
(2) θja=45℃/W (Density of board copper foil34%)
(3) θja=40℃/W (Density of board copper foil60%)
Fig.21
75
95
100
125
150
16/20
1
2
×Ciss×VREG×F
2
1
×1500pF×5×200×5×2,
The value in () is a Power consumption of the Ta=125℃.
PWM
×VREG×2
2010.10 - Rev.0.11
Technical Note