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HA16121FPJ 데이터시트(PDF) 9 Page - Renesas Technology Corp

부품명 HA16121FPJ
상세설명  Switching Regulator for Chopper Type DC/DC Converter
PDF  34 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HA16121FPJ 데이터시트(HTML) 9 Page - Renesas Technology Corp

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HA16116FP/FPJ, HA16121FP/FPJ
Rev.2.0, Sep.18.2003, page 9 of 33
2. DC/DC Converter Output Voltage Setting and Error Amp Usage
2.1 Positive Voltage Booster (V
O > VIN) or Step-Down (VIN > VO > Vref)
VO =
Use
R1 + R2
R2
⋅ Vref (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.
−
+
CH2
Vref
R1
R2
−
+
CH1
R1
R2
VO
IN(+)1
IN(
−)1
IN(
−)2
Error amp.
Vref pin
(internal connection)
2.5 V
VO
Figure 2.1
2.2 Negative Voltage (V
O < Vref) for Inverting Output
VO = −Vref ⋅
R3 + R4
R3
R1
R1 + R2
⋅
− 1 (V)
Use
Channel 1 is used for inverting output on both ICs.
−
+
CH1
R3
R4
VO
IN(
−)1
Error amp
IN(+)2
R1
R2
Vref pin
Vref 2.5 V
Figure 2.2 Inverting Output



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