Rainbow Electronics BA178ххT_FP - Manual (Page 9)

BA178!!T / FP series
Regulator ICs
" " " " Measurement circuits
0.1 µ F
0.33
µ F
I O
V IN
V
OUTPUT INPUT
COMMON
Fig. 1 Measurement circuit for output voltage,
input stability,load regulation,
temperature coefficient of output voltage
0.1 µ F
0.33 µ F
100 µ F
V IN
I O
e
OUT
e
IN
10 Ω 5W
e
IN =1Vrms
f=120Hz
Ripple rejection ratio R.R. = 20 log
e
IN
e OUT
V
~
OUTPUT INPUT
COMMON
V
~
Fig. 2 Measurement circuit for ripple rejection rario
( )
OUTPUT INPUT
COMMON
0.1
0.33 µ F
I O V IN
Noise
meter
BPF
10Hz ∼
100kHz
10 µ F
+
µ F
Fig. 3 Measurement circuit for output noise voltage
V
OUTPUT INPUT
COMMON
0.1 µ F 0.33 µ F
I O
IA
V IN
V
∆ V=
100mA
Fig. 4 Measurement circuit for Minimum
I / O voltage differential
I O
OUTPUT INPUT
COMMON
0.1 0.33
V IN
A
µ F µ F
Fig. 5 Measurement circuit for bias
current and bias current change
A
OUTPUT INPUT
COMMON
0.1 0.33
I O
V IN
µ F µ F
Fig. 6 Measurement circuit for
Fig. 1 output short-circuit current
" " " " Electrical characteristic curves
OUTPUT VOLTAGE : V
OUT
(V)
OUTPUT CURRENT : I OUT (A)
V IN =10V
BA17805T
10
8
6
4
2
0
1.0 1.2 1.4 1.6 1.8 2.0
Fig. 7 Current limit characteristics
OUTPUT VOLTAGE : V
OUT
(V)
JUNCTION TEMPERATURE : Tj (˚C)
6
5
4
3
2
1
0
25 50 75 100 125 150 175 200
V IN =10V, I OUT =0
BA17805T
Fig. 8 Thermal cutoff circuit
Fig. 2 characteristics
25
20
15
10
5
0 25 50 75 100 125 150
(1) Infinite heat sink, θ j-c = 5.7 (˚C/W)
(2) 100 Ч 100 Ч 2 (mm 3 ), with Al heat sink
(3) 50 Ч 50 Ч 2 (mm 3 ), with Al heat sink
(4) No heat sink θ j-a = 62.5 (˚C/W)
POWER DISSIPATION : Pd (W)
(3) 6.5
(4) 2.0
AMBIENT TEMPERATURE : Ta (˚C)
(1) 22.0
(2) 11.0
Fig.9 Ta - power dissipation
characteristics (TO220)
Note: With Al heat sink, tightening
torque = 6 kg/cm and silicon
grease as lubricant