DB318C TOKO, DB318C Datasheet
DB318C
Manufacturer Part Number
DB318C
Description
Fixed Inductors
Manufacturer
TOKO
Datasheet
1.DB318C.pdf
(1 pages)
Inductance Range: 1.0~22µH
• Low profile (4.0mm Max. square and 1.8mm Max. height).
• Magnetically shielded construction and low DC resistance.
• Ideal for DC-DC converter choke coil for portable
• RoHS compliant.
(1) Inductance is measured with a LCR meter 4284A * or equivalent.
(2) DC resistance is measured with a Digital Multimeter TR6871
(3) Maximum allowable DC current is that which causes a 30%
* Agilent Technologies
TYPE DB318C
DIMENSIONS／外形寸法図
equipments (DVD, DSC, Cellular phone, PDA ).
FEATURES／特長
(Advantest) or equivalent.
inductance reduction from the initial value, or coil temperature to rise
by 40°C, whichever is smaller.
(Reference ambient temperature 20°C)
DB318C
A997AS-1R0N
A997AS-2R2N
A997AS-3R3M
A997AS-3R9M
A997AS-4R7M
A997AS-5R6M
A997AS-6R8M
A997AS-8R2M
A997AS-100M
A997AS-120M
A997AS-150M
A997AS-180M
A997AS-220M
Number
東光品番
TOKO
Part
(Quantity/reel; 2,000 PCS)
インダクタンス
Inductance
10.0
12.0
15.0
18.0
22.0
( µ H)
SELECTION GUIDE FOR STANDARD COILS
1.0
2.2
3.3
3.9
4.7
5.6
6.8
8.2
Direction indication
方向表示
Fixed Inductors for Surface Mounting
4.0 Max.
(1)
(1)
Tolerance
許容差
±30
±30
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
(%)
1.8 Max.
www.DataSheet4U.com
(Ω) Max. (Typ.)
Resistance
0.04 (0.032)
0.06 (0.048)
0.07 (0.06)
0.09 (0.08)
0.10 (0.09)
0.12 (0.10)
0.13 (0.11)
0.16 (0.14)
0.18 (0.15)
0.23 (0.19)
0.26 (0.21)
0.33 (0.27)
0.44 (0.37)
直流抵抗
DC
•
•
•
(1) インダクタンスはLCRメータ4284A* または同等品により測定する。
(2) 直流抵抗はデジタルマルチメータTR6871(Advantest)または同等品
(3) 最大許容電流は、直流重畳電流を流した時インダクタンスの値が初
* Agilent Technologies
•
小型薄形構造（4.0mm角Max.、高さ1.8mm Max.）
閉磁路構造、低直流抵抗
小型機器（DVD, DSC, Cellular phone, PDA）などのDC-DCコン
バータ用チョークコイルに最適
RoHS指令対応
により測定する。
期値より30%減少する直流電流値、または直流電流により、コイル
の温度が40℃上昇の何れか小さい値です。
（周囲温度20℃を基準とする。 ）
(2)
(Unit: mm)
(2)
Inductance Decrease Current
1.80 (2.40)
1.30 (1.70)
0.94 (1.26)
0.86 (1.15)
0.85 (1.14)
0.81 (1.09)
0.69 (0.92)
0.59 (0.78)
0.58 (0.77)
0.55 (0.73)
0.48 (0.64)
0.42 (0.56)
0.39 (0.52)
∆L
L
=10%
直流重畳許容電流
(A) Max. (Typ.)
Recommended patterns
推奨パターン図
面
2.30 (3.10)
1.60 (2.10)
1.20 (1.61)
1.10 (1.46)
1.07 (1.43)
1.02 (1.36)
0.89 (1.19)
0.75 (1.00)
0.74 (0.99)
0.70 (0.94)
0.61 (0.81)
0.53 (0.70)
0.51 (0.67)
∆L
L
実装
づ
(3)
=30%
け
用 固定インダクタ
2.2
5.1
(3)
温度上昇許容電流
Rise Current
(A) Max. (Typ.)
Temperature
2.40 (2.80)
1.90 (2.20)
1.64 (1.93)
1.37 (1.61)
1.29 (1.52)
1.23 (1.45)
1.10 (1.29)
1.05 (1.23)
0.99 (1.16)
0.78 (0.92)
0.74 (0.87)
0.63 (0.74)
0.53 (0.63)
∆ T=40°C
(Unit: mm)
(3)
(3)
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