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HA16114 Ver la hoja de datos (PDF) - Renesas Electronics

Número de piezacomponentes Descripciónfabricante
HA16114 Switching Regulator for Chopper Type DC/DC Converter Renesas
Renesas Electronics Renesas
HA16114 Datasheet PDF : 34 Pages
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HA16116FP/FPJ, HA16121FP/FPJ
Determining External Component Constants (pin usage)
Constant settings are explained for the following items.
Oscillator
1. frequency
(fOSC) setting
DC/DC converter
2.
output voltage
setting and
error amp usage
Dead band duty
3. and soft start
setting
Output stage
4.
circuit and
power MOS FET
driving method
S.GND 1
CT 2
RT 3
IN(+)1 4
20 S.VIN
19 Vref
18 TIM
17 ON/OFF
IN()1 5
16 IN()2
E/O1 6 Channel 1
15 E/O2
DB1 7
Channel 2 14 DB2
CL1 8
13 CL2
OUT1 9
12 OUT2
P.GND 10
11 P.VIN
5.
Vref UVL and
OVP
Setting of inter-
mittent operation
6. timing when
overcurrent is
detected
7.
ON/OFF pin
usage
Overcurrent
8. detection value
setting
1. Oscillator Frequency (fOSC) Setting
Figure 1.1 shows an equivalent circuit for the triangle wave oscillator.
VH
1.6 V typ
Vref (2.5 V)
(3.3 V
IC internal circuits)
t1
t2
VL
1.0 V typ
1.1 V RT
RT
(external)
CT charging
IO
Comparator
IO
Discharging
1:2
CT
(external)
CT
RA
RC
RB
Inside the IC
Figure 1.1 Equivalent Circuit for the Triangle Wave Oscillator
Rev.2.0, Sep.18.2003, page 7 of 33
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