HA16120FP HITACHI [Hitachi Semiconductor], HA16120FP Datasheet - Page 35

• Manufacturer Part Number: HA16120FP
• Description: Switching Regulator for Chopper Type DC/DC Converter
• Manufacturer: HITACHI [Hitachi Semiconductor]

Overall Waveform Timing Diagram (for Application Example (1))
V
V ,
V
V
V
PWM
pulse
DC/DC output
(example for
positive
voltage)
IC operation
status
Note: 1. This PWM pulse is on the step-down/inverting control channel (HA16114).
V
OUT
V
V
E/O
CT
DB
CL
IN
TM
ON/OFF
,
*1
,
12 V
0 V
0.0 V
12 V
11.8 V
0 V
12 V
0 V
Power-up IC on
The booster control channel (HA16120) output consists of alternating L and H of the IC on cycle.
1.4 V
(V)
3.0
2.0
1.0
0.0
2.1 V
V
sawtooth wave
V
CT
DB
V
E/O
Soft start
V
V
TM
ON/
,
OFF
On
Pulse-by-pulse
current limiting
Steady state
1.4 V
HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
0.7 V
Off
Overcurrent
detected;
intermittent
operation
Off
On
On
Off
On
Off
Overcurrent
subsides;
steady-state
operation
On
Power supply off,
IC off
Off
Quick
shutdown
35