HA16116FP Datasheet, PDF (26/34 Pages) Hitachi Semiconductor – Switching Regulator for Chopper Type DC/DC Converter

HA16116FP/FPJ, HA16121FP/FPJ
• Triangle Wave Oscillator Block
R_T pin Output Current Characteristics
1.1
1.0
0.9
Reccomended
usage range
10 (R_T ≈ 100 kΩ)
0.8
0
100
200
330 (R_T ≈ 3 kΩ)
300
400
500
I_RT (µA)
Sawtooth Wave Amplitude vs. Oscillator Frequency
2.0
V_TH
1.5
Sawtooth wave
V_TL ^amplitude
1.0
Note: Due to these characteristics, the dead
0.5
band and PWM comparator threshold
voltages change at high frequencies.
0 100 200 300 400 500 600
(DC)
f_OSC (kHz) (linear scale)
100
70
50
30
20
10
7
5
3
10
C_T, R_T Values (V_IN = 12V) vs. Oscillator Frequency
00.1
µ_F
4700
pF
2200
1000
pF
pF
470 _pF
C
220
100
pF
T₌
pF
47
pF
600 kHz
20 30 50 70 100
200 300 500 700 1 M
Oscillator frequency f_OSC (kHz)
Oscillator Frequency Temperature Stability
+10
V_IN = 12 V
+5
A: f_OSC = 300 kHz
B: f_OSC = 600 kHz
B
0
A
A
−5
−10
−20
B
85
0
20
40
60
80
100
Ambient temperature Ta (°C)
26