NJM2340 查看數據表（PDF） - Japan Radio Corporation

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NJM2340

HIGH PRECISION DC/DC CONVERTER CONTROL IC

Japan Radio Corporation  

■ELECTRICAL CHARACTERISTICS (V+=12V,Ta=25°C)

REFERENCE VOLTAGE BLOCK

PARAMETER

SYMBOL TEST CONDITION

Output Voltage

Line Regulation

Load Regulation

VREF

LINE

LOAD

IOR=1mA

V+=3.6 ∼ 32V, IOR=1mA

IOR=0.1 ∼ 5.0mA

OSCILLATOR BLOCK

PARAMETER

Oscillation Frequency

SYMBOL TEST CONDITION

fOSC RT=27kΩ, CT=220pF

CURRENT SENSE AMPLIFIER BLOCK

PARAMETER

SYMBOL

TEST CONDITION

Reference Voltage1

Input Bias Voltage1

Maximum Output Voltage1

(F.B Pin)

Maximum Source Current1

(F.B Pin)

VB1

IB1

VOM+1

VOM-1

IOM1

RNF=100kΩ

RNF=100kΩ

VOM1=0.5V

ERROR AMPLIFIER BLOCK

PARAMETER

SYMBOL TEST CONDITION

Reference Voltage2

Input Bias Voltage2

Maximum Output Voltage2

(F.B Pin)

Maximum Source Current2

(F.B Pin)

VB2

IB2

VOM+2

VOM-2

IOM2

RNF=100kΩ

RNF=100kΩ

VOM2=0.5V

PWM COMPARATE BLOCK

PARAMETER

Input Threshold Voltage (F.B Pin)

Input Threshold Voltage (F.B Pin)

SYMBOL TEST CONDITION

VTH0

VTH100

duty·cycle=0% (note)

duty·cycle=100% (note)

OUTPUT BLOCK

PARAMETER

L Output Voltage (OUT Pin)

SYMBOL TEST CONDITION

VOL ISINK=10mA

GENERAL CHARACTERISTICS

PARAMETER

SYMBOL TEST CONDITION

Average Quiescent Current

ICCAV RL=∞, duty·cycle=50%

(note) Duty·Cycle is defined as follows:

Duty·Cycle=0%: IC output transistor is OFF.

Duty·Cycle=100%: IC output transistor is ON.

NJM2340

MIN.

1.98

–

–

TYP.

2.00

4.0

6.0

MAX.

2.02

20

40

UNIT

V

mV

mV

MIN.

315

TYP.

350

MAX. UNIT

385 kHz

MIN.

144

–

–

0.6

40

TYP.

150

20

VREF

-0.15

0.75

85

MAX.

156

100

–

UNIT

mV

nA

V

0.9

V

200 µA

MIN.

0.985

–

–

0.6

40

TYP.

1.000

20

VREF

-0.15

0.75

85

MAX.

1.015

100

–

0.9

200

UNIT

V

nA

V

V

µA

MIN.

VOM-

–

TYP.

1.0

1.4

MAX.

1.1

–

UNIT

V

V

MIN.

–

TYP.

0.5

MAX. UNIT

0.7

V

MIN.

–

TYP.

1.5

MAX. UNIT

2.0 mA

-3 -

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