Regulator ics, Measurement circuits, Electrical characteristic curves – Rainbow Electronics BA178MххT_FP User Manual
Page 9: Fig. 7 current limit characteristics, Fig. 8 thermal cutoff circuit characteristics, Fig.9 thermal derating characteristic (to220fp)
BA178M!!T / BA178M!!FP series
Regulator ICs
"
"
"
"
Measurement circuits
V
OUTPUT
INPUT
COMMON
0.1
µ
F
0.33
µ
F
100
µ
F
V
IN
V
I
O
e
OUT
10
Ω
5W
e
IN
=1Vrms
f=120Hz
Ripple rejection ratioR.R.=20 log
e
IN
e
OUT
(
)
Fig. 2
Measurement circuit for ripple rejection ratio
Fig. 3 Measurement circuit for output noise voltage
OUTPUT
INPUT
COMMON
0.1
0.33
µ
F
I
O
V
IN
Noise
meter
BPF
10Hz
~
100kHz
10
µ
F
+
µ
F
Fig. 4
Measurement circuit for Minimum
I/O voltage differential
V
OUTPUT
INPUT
COMMON
0.1
µ
F
0.33
µ
F
I
O
V
IN
V
500mA
∆
V
=
100mV
Fig. 5
Measurement circuit for bias current
and bias current change
I
O
V
0.1
µ
F
0.33
µ
F
V
IN
A
OUTPUT
INPUT
COMMON
Fig. 6
Measurement circuit for
Fig. 10
output short-circuit current
A
OUTPUT
INPUT
COMMON
0.1
µ
F
0.33
µ
F
I
O
V
IN
V
OUTPUT
INPUT
COMMON
0.1
µ
F
0.33
µ
F
I
O
V
IN
Fig. 1
Measurement circuit for output voltage,
input stability, load regulation,
temperature coefficient of output voltage
"
"
"
"
Electrical characteristic curves
OUTPUT VOLTAGE : V
OUT
(V)
OUTPUT CURRENT : I
OUT
(A)
V
IN
=10V
BA178M05T
10
8
6
4
2
0
0.2
0.4
0.6
0.8
1.0
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
BA178M05T
V
IN
=10V, I
OUT
=0
Fig. 8 Thermal cutoff circuit
characteristics
25
20
15
10
5
0
25
50
75
100
125
150
POWER DISSIPATION : Pd (W)
(3) 6.5
(4) 2.0
AMBIENT TEMPERATURE : Ta (
°
C)
(1) 22.0
(2) 11.0
Fig.9 Thermal derating characteristic
(TO220FP)
(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)