HA17451 datasheet(9/15 Pages) HITACHI

Part #	HA17451

Description	Switching Regulator Controllers for DC/DC Converters

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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9 / 15 page

HA17451AP/HA17451AFP

9

Characteristic Curves

3.0

2.5

2.0

1.5

1.0

0.5

0

I

= 1 mA

Ta = 25

°C

OUT

0

10

20

30

40

Reference Output Voltage vs. Supply Voltage

Supply Voltage VCC (V)

Reference Output Voltage Variation vs. Ambient Temperature

Ambient Temperature Ta (

°C)

Frequency (Hz)

Ambient Temperature Ta (

°C)

Dead Time Input Voltage VD.T.C (V)

Drop-Out Voltage vs. Ambient Temperature

Open Loop Gain, Phase Variation vs. Frequency

Output Transistor “ON” Duty vs.

Dead Time Input Voltage (1)

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–20

0

25

50

75

85

V

CC = 6 V

I

OUT = 1 mA

16 15 141312 11 10 9

1 2 34 5 6 78

HA17451A

A

V

1 mA

0.4

0.3

0.2

0.1

0

–20

0

25

50

75

85

Vdrop = V

– Vref (V

= 3 V)

V

: Vref (V

= 3 V) – Vref (X) > 5 mV

CC (X)

CC

100

1 k

10 k

100 k

1 M

10 M

100

90

80

70

60

50

40

30

20

10

0

V

= 6 V

Ta = 25

°C

CC

Av

φ

Dead Time Input Voltage VD.T.C (V)

Output Transistor “ON” Duty vs.

Dead Time Input Voltage (2)

0

20

40

60

80

100

1.00

1.25

1.50

1.75

2.00

2.25

V

= 6 V

C = 33000 pF

R = 39 k

f

= 0.8 kHz

Ta = 25

°C

CC

T

Ω

OSC

0

20

40

60

80

100

1.00

1.25

1.50

1.75

2.00

2.25

V

= 6 V

C = 330 pF

R = 10 k

f

= 200 kHz

Ta = 25

°C

CC

T

OSC

Ω

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HA17451 Datasheet(PDF) 9 Page - Hitachi Semiconductor

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