17431 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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17431

Shunt Regulator

Hitachi -> Renesas Electronics 

HA17431 Series

HA17431PJ/PAJ/FPJ/FPAJ/P/PA/UA/UPA/FP/FPA/PNA/PNAJ, HA17432UA/UPA

Oscillation Stability vs. Load Capacitance between Anode and Cathode

150

1.5

100 Stable

region

Oscillation

region

50

VCC

CL

0

0.0001

0.001

0.01

0.1

1.0 2.0

Load capacitance CL (µF)

Open Loop Voltage Gain, Phase vs. Frequency Characteristics (1)

(With no feedback capacitance)

60

GV

50

IK = 10 mA

0

40

φ

30

90

20

220 Ω

15 kΩ

10

10 µF

Vout

Vin 8.2 kΩ GND

180

0

10

100

1k

10 k 100 k

Frequency f (Hz)

Open Loop Voltage Gain, Phase vs. Frequency Characteristics (2)

(When a feedback capacitance (Cf) is provided)

10

IK = 5 mA

Gυ

8

Gυ

180

Cf = 0.022 µF

5

φ

Cf = 0.22 µF

270

0 200 µF

2k

Cf + Vout

2.4 kΩ

20 V

–

Vin

50 Ω

GND

–4

10

100

1k

360

10 k

Frequency f (Hz)

Rev.1, Sep. 2002, page 11 of 24

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