TPCT4202 Toshiba, TPCT4202 Datasheet - Page 8

• Manufacturer Part Number: TPCT4202
• Description: Lithium Ion Battery Applications
• Manufacturer: Toshiba

Note12:(1) 【Element mechanical stress】
This product is very small and thin.External stress may cause breakdown of the package and/or chip, please handle this
product within the distortion factor less than 2000με or equal in the shaded area shown in the figure 4.However,
please confirm that there is no problem on this product embedded in your product, because the applied stress of this
product may vary dependently on the substrate shape, the material, the wiring pattern, the mounting parts arrangement
and so on. Moreover, please design your product with the space to protect this product on the mounting upper surface
(marked side) from the stress.
The distortion factor[ ε] is defined by the following expressions.
:(2) Please be aware that rigid printed board in actual application should be thicker than 0.4 mm.
Use recommended area
ε = 6 hS/(L*L)
Examination method (reference standard JEITA ED-4702A):
The substrate on which the device is mounted is positioned with the product face down on support stands, with
a distance of 31 mm between substrate fulcrums as shown in Figure 5 below. Stress is applied as shown in
Figure 6.
Mounting substrate: Glass Epoxy substrate FR-4 (JIC C 6484) and size 36 X 6 mm and h = 0.6 mm
2.5 mm
2000 µε line
6 mm
100
90
80
70
60
50
40
30
20
10
0
0.0
0.2
Distance between substrate fulcrums: 31 mm
0.4
Figure 5. During substrate installation
0.6
R230
Figure 6. During testing
Figure 4. Support width－Bend
0.8
36 mm
1.0
1.2
* This line varies depending on the substrate
thickness.
Bend (mm)
h: Board thickness S = Bend L = Support width
Stress
1.4
8
1.6
1.8
STP
Mounted lengthwise
Warp rate measurement position
(Center of the substrate rear side)
Board thickness: h = 0.6 mm
2.0
2.2
2.4
2.5 mm
2.6
2.8
Support stand
3.0
Bend
TPCT4202
2007-01-16