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| HA16116FP Datasheet, PDF (31/34 Pages) Hitachi Semiconductor – Switching Regulator for Chopper Type DC/DC Converter | |||
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HA16116FP/FPJ, HA16121FP/FPJ
Application Examples (2) (Some Pointers on Use)
1. Inductor, Power MOS FET, and Diode Connections
1. Booster specification
V IN
CF
V IN
RF
CL
OUT
GND
3. Inverting specification
RCS Applicable only
to channel 2
of HA16121FP
VO
FB
2. Step-down specification
V IN
V IN
CF
RF
RCS
CL
OUT
Applicable to
HA16116FP and
to channel 1
of HA16121FP
VO
GND
FB
4. Negative booster specification (Flyback transformer)
V IN
CF
RF
RCS Applicable only
to channel 1
CL
OUT
VO
GND
FB
Vref
V IN
CF
RF
RCS Applicable only
to channel 1
CL
OUT
GND
FB
2. Turning Output On and Off while the IC is On
1. To turn only one channel off, ground the DB pin
or the E/O pin. In the case of E/O, however,
there will be no soft start when the output is
turned back on.
DB
E/O
OFF
2. When only one channel is to be used,
the channel not used should be connected
as follows.
Connect CL to VIN.
Ground IN(+) and IN(â).
Leave other pins open.
VIN CL
IN +
IN â
GND
31
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