HA16654A Datasheet, PDF (11/15 Pages) Hitachi Semiconductor – PWM Controlled Switching Regulator

HA16654A, HA16664A Series
Pulse Duty Cycle vs. Ambient Temperature (HA16654A)
60
( ) CT
R_T
=
=
220 pF
27 kΩ
f ≅ 500 kHz
50
( ) CT
R_T
=
=
330
150
pF
kΩ
f ≅ 100 kHz
40
30
–20
0
20
40
60
80
Ambient Temperature Ta (°C)
∆ton/ton vs. Ambient Temperature (HA16654A)
+10
0
–10
–20
( ) CT
R_T
=
=
220 pF
27 kΩ
f ≅ 500 kHz
( ) CT
R_T
=
=
330
150
pF
kΩ
f ≅ 100 kHz
0
20
40
60
80
Ambient Temperature Ta (°C)
Pulse Duty Cycle vs. Ambient Temperature (HA16664A)
60
50
40
( ) CT = 330 pF
R_T = 150 k Ω
f ≅ 100 kHz
( ) CT
R_T
=
=
220 pF
95 k Ω
f ≅ 200 kHz
30
–20
0
20
40
60
80
Ambient Temperature Ta (°C)
∆ton/ton vs. Ambient Temperature (HA16664A)
+10
( ) CT
R_T
=
=
330
150
pF
kΩ
f ≅ 100 kHz
( ) CT
R_T
=
=
220 pF
95 kΩ
f ≅ 200 kHz
0
–10
–20
0
20
40
60
80
Ambient Temperature Ta (°C)
11