ha16116fpj Renesas Electronics Corporation., ha16116fpj Datasheet - Page 7

• Manufacturer Part Number: ha16116fpj
• Description: Switching Regulator For Chopper Type Dc/dc Converter
• Manufacturer: Renesas Electronics Corporation.

HA16116FP/FPJ, HA16121FP/FPJ
Determining External Component Constants (pin usage)
Constant settings are explained for the following items.
1. Oscillator Frequency (f
Figure 1.1 shows an equivalent circuit for the triangle wave oscillator.
Rev.2.0, Sep.18.2003, page 7 of 33
1.
2.
3.
4.
Oscillator
frequency
(f
DC/DC converter
output voltage
setting and
error amp usage
Dead band duty
and soft start
setting
Output stage
circuit and
power MOS FET
driving method
t
OSC
1
) setting
t
2
Figure 1.1 Equivalent Circuit for the Triangle Wave Oscillator
V
1.6 V typ
V
1.0 V typ
H
L
OSC
(external)
) Setting
1.1 V
S.GND
P.GND
IN(+)1
IN( )1
OUT1
E/O1
DB1
CL1
R
C
R
T
R
T
T
T
10
1
2
3
4
5
6
7
8
9
Channel 1
Channel 2
Vref (2.5 V)
1 : 2
Discharging
C
I
O
20
19
18
17
16
15
14
13
12
11
T
charging
I
C
O
S.V
Vref
TIM
ON/
IN( )2
E/O2
DB2
CL2
OUT2
P.V
T
C
(external)
T
IN
IN
OFF
Comparator
5.
6.
7.
8.
(3.3 V
IC internal circuits)
Vref UVL and
OVP
Setting of inter-
mittent operation
timing when
overcurrent is
detected
ON/
usage
Overcurrent
detection value
setting
Inside the IC
OFF
R
C
pin
R
R
A
B