HA16116FP Datasheet, PDF (30/34 Pages) Hitachi Semiconductor – Switching Regulator for Chopper Type DC/DC Converter

HA16116FP/FPJ, HA16121FP/FPJ
Overall Waveform Timing Diagram (for Application Examples (1))
12 V
V_IN
0V
V_TIM ,
V_ON/OFF
2.8 V
2.1 V
V_TIM ,
V_ON/OFF
2.1 V
1.4 V
0V
(V)
3.0
2.0
V_E/O,
V_CT,
V_DB
1.0
On
V_E/O
V_CT
triangle wave
On
On
On
On
Off Off Off Off
Off
V_DB
0.0
12 V
V_CL
11.8 V
0V
V_OUT*1 ^{12 V}
PWM
pulse _{0 V}
DC/DC output
(example for
positive
voltage)
Pulse-by-pulse
current limiter
operates
IC operation
states
Power IC on
supply on
Soft start
Steady-state
operation
Overcurrent
detected;
intermittent
operation
Overcurrent Quick
cleared;
shut-off
steady-state
operation
Power supply off,
IC off
Note: 1.This PWM pulse is on the step-down/inverting control channel.
The booster control channel output consists of alternating L and H of the IC on cycle.
30