ha16116fpj Renesas Electronics Corporation., ha16116fpj Datasheet - Page 9

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

HA16116FP/FPJ, HA16121FP/FPJ
2. DC/DC Converter Output Voltage Setting and Error Amp Usage
2.1 Positive Voltage Booster (V
Booster output is possible only at channel 2 of HA16121. For step-down output, both channels of
HA16116 or channel 1 of HA16121 are used.
2.2 Negative Voltage (V
Channel 1 is used for inverting output on both ICs.
Rev.2.0, Sep.18.2003, page 9 of 33
Use
Use
V
V
O
O
=
= Vref
R
1
R
+ R
2
O
2
< Vref) for Inverting Output
R
R
R
Vref (V)
1
1
2
R
V
+ R
R
R
1
O
O
1
2
> V
2
R
R
3
4
Figure 2.2 Inverting Output
IN
R
R
V
) or Step-Down (V
O
1
2
R
V
3
Vref pin
O
Vref pin
R
+ R
3
4
Figure 2.1
1
IN( )1
IN(+)1
IN( )2
IN( )1
IN(+)2
(internal connection)
(V)
Vref
2.5 V
Vref 2.5 V
IN
Error amp.
Error amp
+
+
+
> V
O
> Vref)
CH1
CH2
CH1