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参数资料
| 型号： | BA78M10FP-E2 |
| 元件分类： | 固定正电压单路输出标准稳压器 |
| 英文描述： | 10 V FIXED POSITIVE REGULATOR, PSSO2 |
| 封装： | ROHS COMPLIANT, TO-252, 3 PIN |
| 文件页数： | 2/13页 |
| 文件大小： | 581K |
| 代理商： | BA78M10FP-E2 |
10/12
●
Thermal design
Refer to the following thermal derating curves (Fig. 25, 26), when using in the status of Ta=25℃ or more.
The characteristic of IC is greatly related to the operating temperature.
When it is used in over maximum junction temperature, the elements inside IC might become weaker and be destroyed.
It is recommended to take into consideration thermal of IC.
Note that the temperatures are in the allowed temperature limits and operated within Pd.
It is necessary to operate it at junction temperature Tjmax or less to prevent IC from the thermal destruction.
Please operate IC within permissible loss Pd because the junction temperature Tj might become considerably a high
temperature even if ambient temperature Ta is normal temperature (25℃).
Power consumption Pc(W) may be expressed by the equation shown below:
Pc=(Vin-Vo)×Io+ Vin×Iｂ
permissible loss Pd≧Pc
Maximum Output current IoMAX can be calculated in thermal design.
·
Calculation example
Ex.1) Ta=85℃, Vin =7.5V, Vo=5.0V
Io≦400ｍA
Be sure to use this IC within a power dissipation at the range of operating temperature.
Fig.25 Thermal derating curve (TO220CP-3)
Fig.26 Thermal derating curve (TO252-3)
●
Terminal Setting and Cautions
·
INPUT
It is recommended that a capacitor (about 0.33uF) be inserted between INPUT and COMMON.
The value of capacitor is designed suitable for the actual application.
·
OUTPUT
It is recommended that a capacitor (about 0.1uF) be inserted between OUTPUT and COMMON.
A tantalum capacitor can also be used for this pin because insufficient capacitors may cause oscillation by a temperature
change.
·
COMMON
Keep the no voltage drop between Ground level of set board and IC.
When there is the voltage difference, setting voltage becomes inaccuracy and unstable.
It is recommended to connect by wide, short pattern, and lower the inpedance.
Vo
Vin
Ib
Vin
Pd
Io
≦
5.0
7.5
4.5m
7.5
1.04
Io
≦
Vin : Input Voltage
Vo : Output Voltage
Io
: Output Current
Ib
: Bias current
Using TO220CP-3 alone
θ
ja=62.5℃/W→16mW/℃
Pd=1.04W at 85℃
12.5
10
7.5
5
2.5
0
25
50
75
125
100
150
AMBIENT TEMPERATURE : Ta[℃]
POWER
D
ISSI
P
A
T
ION:
Pd[
W
]
(2) 1.0
(1) 10.0
(1) Mounted on infinity Alminium heat sinkθj-c=12.5 (℃/W)
(2) Using an IC aloneθj-a=125.0℃/W
25
20
15
10
5
0
25
50
75
125
100
150
AMBIENT TEMPERATURE : Ta[℃]
POWER
D
ISSI
P
A
T
ION:
Pd[
W
]
(2) 2.0
(1) 22.0 (1) Mounted on infinity Alminium heat sinkθj-c=5.7(℃/W)
(2) Using an IC aloneθj-a=62.5℃/W
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