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Epson SCI 7660 SERIES, Руководство пользователя

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SCI7660 Series

1–2

EPSON

SCI7000 Series

Technical Manual

Parameter

Symbol

Rating

Unit

Input voltage range

V

I

–10.0 to 0.5

V

Output voltage range

V

O

Min. –20.0

V

Power dissipation

P

D

300 (DIP)

 mW

150 (SOP)

Operating temperature range

T

opr

–40 to 85

˚C

Storage temperature range

T

stg

–65 to 150

˚C

Soldering temperature(for 10s). See note.

T

sol

260

˚C

SPECIFICATIONS

Absolute Maximum Ratings

Note:
Temperatures during reflow soldering must remain within the limits set out in LSI Device Precautions.
Never use solder dip to mount SCI7000 series power supply devices.

Recommended Operating Conditions

V

DD

 = 0V, Ta = –40 to 85˚C unless otherwise noted

Parameter

Symbol

Condition

Rating

Unit

Min.

Typ.

Max.

R

OSC

 = 1M

Ω

,

C

1

/C

2

≤

1/20, C

2

≥

10

µ

F,

—

—

–1.5

Oscillator startup voltage

V

STA

Ta = –40 to 85˚C

V

See note 1.

R

OSC

 = 1M

Ω

—

—

–2.2

Oscillator shutdown voltage

V

STP

R

OSC

 = 1M

Ω

–1.5

—

—

V

Load resistance

R

L

R

L

 min

—

—

Ω

See note 2.

Output current

I

O

—

—

30.0

mA

Clock frequency

f

OSC

10.0

—

30.0

kHz

RC oscillator network

R

OSC

680

—

2,000

k

Ω

resistance

Capacitance

C

1

, C

2

3.3

—

—

µ

F

Notes:
1. The recommended circuit configuration for low-voltage operation (when V

I

 is between –1.2V and

–2.2V) is shown in the following figure.  Note that diode D1 should have a maximum forward voltage of
0.6V with 1.0mA forward current.

2. R

L

 min can be varied depending on the input voltage.

Содержание SCI 7660 SERIES

Страница 1: ...1 DC DC Converter ...

Страница 2: ...voltage Low operating voltage On chip RC oscillator 8 pin plastic DIP and 8 pin plastic SOP APPLICATIONS Fixed voltage power supplies for battery operated equipment Power supplies for pagers memory cards calculators and similar hand held equipment Fixed voltage power supplies for medical equipment Fixed voltage power supplies for communications equipment Uninterruptable power supplies BLOCK DIAGRA...

Страница 3: ...ices Recommended Operating Conditions VDD 0V Ta 40 to 85 C unless otherwise noted Parameter Symbol Condition Rating Unit Min Typ Max ROSC 1MΩ C1 C2 1 20 C2 10µF 1 5 Oscillator startup voltage VSTA Ta 40 to 85 C V See note 1 ROSC 1MΩ 2 2 Oscillator shutdown voltage VSTP ROSC 1MΩ 1 5 V Load resistance RL RL min Ω See note 2 Output current IO 30 0 mA Clock frequency fOSC 10 0 30 0 kHz RC oscillator n...

Страница 4: ...SC 1MΩ 20 30 µA VI 5V Quiescent current IQ RL VI 8V 2 0 µA Clock frequency fOSC ROSC 1MΩ VI 5V 16 20 24 kHz Output impedance RO IO 10mA VI 5V 75 100 Ω Multiplication efficiency Peff IO 5mA VI 5V 90 95 OSC1 Input leakage current ILKI VI 8V 2 0 µA 3 RL min is a function of VI Electrical Characteristics Battery C L D1 C2 22µF C1 10µF R L 1MΩ 8 7 6 5 1 2 3 4 1 0 5 4 3 2 1 0 1 5 2 0 Input voltage V Min...

Страница 5: ...18 17 16 15 14 13 12 11 10 9 8 40 20 0 20 40 Ta C f OSC KHz 60 80 100 VI 5 0V VI 3 0V VI 2 0V Clock frequency vs External resistance Clock frequency vs Ambient temperature 50 45 40 35 30 25 20 15 10 5 0 7 6 5 4 3 2 1 0 lopr µA VI V Ta 25 C fOSC 40kHz fOSC 20kHz fOSC 10kHz 0 5 10 15 0 10 20 30 40 50 V O V IO mA Ta 25 VI 5 0V Multiplier current vs Input voltage Output voltage vs Output current ...

Страница 6: ...3 0V 0 1 2 3 4 5 6 0 2 3 4 5 6 7 8 9 10 1 V O V IO mA Ta 25 C VI 2 0V Output voltage vs Output current Output voltage vs Output current 300 200 100 0 7 6 5 4 3 2 1 0 R O Ω VI V Ta 25 C IO 7mA 300 200 100 0 7 6 5 4 3 2 1 0 R O Ω VI V Ta 25 C Io 10mA Output impedance vs Input voltage Output impedance vs Input voltage ...

Страница 7: ...I 3 0V Multiplication efficiency vs Clock frequency Multiplication efficiency vs Clock frequency 100 90 80 70 60 50 40 30 20 10 0 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 Peff I I mA IO mA Ta 25 C VI 5 0V II Peff 100 90 80 70 60 50 40 30 20 10 0 100 90 80 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 Peff I I mA IO mA Ta 25 C VI 3 0V II Peff Multiplication efficiency input current vs Multipli...

Страница 8: ...C2 OSC1 OSC2 External clock signal 100 90 80 70 60 50 40 30 20 10 0 40 36 32 28 24 20 16 12 8 4 0 0 1 2 3 4 5 6 7 8 9 10 Peff I I mA IO mA Ta 25 C VI 2 0V II Peff Multiplication efficiency input current vs Output current Voltage Multiplier The voltage multiplier uses the clock signal from the oscillator to double the input voltage This requires two external capacitors a charge pump capacitor C1 be...

Страница 9: ... V VO 10 V 1MΩ 8 7 6 5 1 2 3 4 C1 10µF 1MΩ 8 7 6 5 1 2 3 4 Serial Connection Connecting two or more chips in series obtains a higher output voltage than can be obtained using a parallel connection however this also raises the output imped ance Potential levels 5 V C1 10µF C2 10µF VDD 0 V VI 5 V VO 15 V VO 10 V VI VDD VI 5 1MΩ 8 7 6 5 1 2 3 4 C1 10µF C2 10µF 1MΩ 8 7 6 5 1 2 3 4 VDD 0 V VI 5 V VO 10...

Страница 10: ...tage positive 5 V C2 10µF VDD 0 V VO 3 8 V VI 5 V 1MΩ C1 10µF 8 7 6 5 1 2 3 4 Simultaneous Voltage Conversion Combining a multiplier circuit with a positive voltage conversion circuit generates both 10 and 3 8 V outputs from a single input Potential levels 5 V C2 10µF VDD 0 V VO2 3 8 V VO1 10 V VI 5 V 1MΩ C3 C4 10µF 10µF 8 7 6 5 1 2 3 4 C1 10µF VO2 3 8 V VO1 10 V VDD 0 V VI 5 V ...

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