HA17524P Datasheet, PDF (7/18 Pages) Hitachi Semiconductor – Switching Regulator Controller

HA17524P/FP
Operating Waveforms
Figure 9 shows operating waveforms at every part, when stepdown voltage type chopper switching
regulator (figure 8) is used. Operating condition are as follows: f = 20 kHz, V_OUT = 5 V. At the output
section, two channels are connected in parallel. Operating waveforms inside the IC are also shown.
HA17524
V_CC 15 V
5 kΩ
5 kΩ
5 kΩ
0.1 µF
6 kΩ
0.01 µF
5
k
Ω
(1)
(15)
Inv
V_CC
E₁(11)
(2) Non Inv C₁(12)
(16)Ref
C ₂(13)
(6) R_T
E₂(14)
(7) C _T
+CL (4)
(10)SDhouwtn –CL (5)
Osc Out ⁽³⁾
Comp (9)
(8) GND
Q ^(A) L
D
3 kΩ
0.001 µF
50 k Ω
R_S
V_OUT
5V
C
Figure 8 Stepdown Voltage Type Chopper Switching Regulator
7