HA16654A Datasheet, PDF (10/15 Pages) Hitachi Semiconductor – PWM Controlled Switching Regulator

HA16654A, HA16664A Series
Pulse Duty Cycle vs.
Dead Band Voltage in PWM Comparator (HA16654A)
100
90
V_IN = 20 V
80
f ≅ 300 kHz
70
60
f ≅ 500 kHz
50
f ≅ 100 kHz
40
30
20
10
0 0.6
0.7
0.8
0.9
Dead Band Voltage (V)
Pulse Duty Cycle vs.
Dead Band Voltage in PWM Comparator (HA16664A)
100
90
V_IN = 20 V
80
f ≅ 100 kHz
70
60
50
40
f ≅ 200 kHz
30
20
10
0 0.6
0.7
0.8
0.9
Dead Band Voltage (V)
∆f/f vs. Ambient Temperature (HA16654A)
+10 _{f ≅ 500 kHz}
( ) RT = 27 kΩ
C_T = 220 pF
0
f ≅ 100 kHz
–10
R_T = 150 kΩ
( ) _{( ) CT = 330 pF}
f ≅ 300 kHz
R_T = 56 kΩ
C_T = 220 pF
–20
–20
0
20
40
60
80
Ambient Temperature Ta (°C)
∆f/f vs. Ambient Temperature (HA16664A)
+10
f ≅ 100 kHz
( ) RT = 150 kΩ
C_T = 330 pF
0
f ≅ 200 kHz
–10
( ) RT = 95 kΩ
C_T = 220 pF
–20
–20
0
20
40
60
80
Ambient Temperature Ta (°C)
10