参数资料
型号: BD9206EFV-E2
厂商: Rohm Semiconductor
文件页数: 12/18页
文件大小: 0K
描述: IC LED DRIVER 6V LCD 20HTSSOP
标准包装: 1
恒定电流:
恒定电压:
拓扑: PWM
输出数: 6
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
电源电压: 8 V ~ 30 V
输出电压: 5V
安装类型: 表面贴装
封装/外壳: 20-VSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-HTSSOP
包装: 标准包装
工作温度: -40°C ~ 85°C
其它名称: BD9206EFV-E2DKR
BD9206EFV
Datasheet
● The calculation of electric power consumption for IC and the deciding method of external resistance value
Electric power consumption of IC is decided with formula below.
P(N)=ICC*VCC+[(Vo-RL*ILED)-(Vf+⊿Vf+⊿VfT)*M]*N*ILED ????①
ICC IC Consumed electric
: current
VCC : Input voltage
Vf : LED Vf voltage
: ( normal temperature typ )
⊿Vf : LED Vf Variation
Vo
RL
⊿VfT : LED Vf Temperature
: variation
M
: Stage number around
*M
V
F
N
ILED
Vo
RL
: LED 1 line
: LED line number
LED Constant current
value
Voltage OF LED anode
side
external resistance
*N
ILED
Figure 20
(external loss)
Please insert the heat-radiation resistor RL in order to decrease the heat radiation at the IC.
If the value of RL is made to be larger, then the heat radiation of the IC is decreased, but if the terminal voltage VLED of the
LED driver is less than 0.6V, then the constant current operation becomes impossible, therefore please set the RL in such a way
that the following expression is met:
VLED=Vo- ( Vf+ ⊿ Vf+ ⊿ VfT ) *M-RL*ILED>0.6V
Please set the ILED and RL in such a way that the relational expressions ① & ② are met.
Moreover, the permissible loss of the package is as shown in the following graph.
HT SS OP- B2 0 Pd
4 .0
① Heat 層 dissipation    
( :1 基板 
3 .5
3 .0
3.20
① 1layer baseplate
( 表層 foil on 箔:
copper 放熱 銅 surface :
2 .5
2 .0
1 .5
2.30
Omm2 )
0mm2
② 2layer base ― plate
( Heat dissipation
②:2 foil on Inside
(表 outside layer
copper 層基 板     
and 裏層放熱銅箔:
4900mm2)
1 .0
1.00
4900mm2)
0 .5
0 .0
0
25
50
75
100
125
150
③ 4layer base ― plate
( Heat dissipation
(全層 foil on 箔:
layer :
③:4 層基板    
copper 放熱銅 whole
4900mm2 4900mm2 )
周 囲 温 around (℃
Temperature 度Ta( ℃) )
Figure 21
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
12/15
TSZ02201-0F1F0C100070-1-2
20.Sep.2012 Rev.001
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