LND3843B 데이터 시트보기 (PDF) - Linear Dimensions Semiconductor

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LND3843B

Current Mode PWM Controller

Linear Dimensions Semiconductor 

LND3842/43/44/45

ELECTRICAL CHARACTERISTICS

(*Vcc =15 V, RT=10kΩ ,CT=3.3nF, TA=0 to 70° C, unless otherwise specified )

Characteristics

Symbol

Test Conditions

Min

Reference Section

Reference Output Voltage

Line Regulation

Load Regulation

Short Circuit Output

Current

Oscillator Section

Oscillation Frequency

Frequency change with

Voltage

Oscillator Amplitude

Error Amplitude Section

Input Bias Current

Input Voltage

Open Loop Voltage Gain

Power Supply Rejection

ratio

Output Sink Current

VREF

∆VREF

∆ VREF

ISC

f

∆f/∆Vcc

V(OSC)

IBIAS

VI(E,A)

AVOL

PSRR

ISINK

TJ =25°C, IREF=1mA

4.9

12V≤VCC≤25V

1mA≤ IREF≤20mA

TA=25°C

TJ=25°C

47

12V≤VCC≤25V

(Peak to Peak)

VFB=3V

Vpin1=2.5V

2V≤VO≤4V

65

12V≤VCC≤25V

60

Vpin2 =2.7V, Vpin1=1.1V

2

Output Source current

ISOURCE

Vpin2=2.3V, Vpin1=5V

-0.5

High Output Voltage

VOH

Low Output Voltage

Current Sense Section

Gain

Maximum Input Signal

Supply Voltage rejection

Input Bias Current

Output Section

Low Output Voltage

VOL

GV

VI(MAX)

SVR

IBIAS

VOL

High Output Voltage

VOH

Rise Time

tR

Fall time

tF

Undervoltage Lockout Section

Start Threshold

VTH(ST)

Min. Operating Voltage

(After Turn on)

PWM Section

VOPR(MIN)

Max. Duty Cycle

Min. Duty cycle

Total Standby Current

D(MAX)

D(MAX)

Start-Up current

Operating Supply Current

Zener Voltage

IST

ICC(OPR)

VZ

Vpin2=2.3V,RL=15kΩ to

GND

Vpin2=2.7V,RL=15kΩ t o

PIN 8

(Note 1& 2)

Vpin1 =5V(note 1)

12V≤Vcc≤25V(note 1)

Vpin3= 3V

Isink=20mA

Isink=200mA

Isink=20mA

Isink=200mA

TJ=25°C, CL =1nF(note

3)

TJ=25°C, CL =1nF(note

3)

LND3842A,B/44A,B

LND3842A,B/45A,B

LND3842A,B/44A,B

LND3842A,B/45A,B

LND3842A,B/43A,B

LND3842A,B/45A,B

5.0

2.85

0.9

13

12

14.5

7.8

8.5

7.0

95

47

LND3842A/43A/44A/45A

LND3842B/43B/44B/45B

VPIN3=VPIN2 =0V

ICC=25mA

30

*Adjust VCC above the start threshold before setting it to 15V.

Typ

5.0

6.0

6.0

100

52

0.05

1.6

-0.1

2.5

90

70

7

-1.0

6.0

0.8

3.0

1.0

70

-3.0

0.08

1.4

13.5

13.0

45

35

16.0

8.4

10

7.6

97

48

0.17

0.45

13

38

Max

Unit

5.1

V

20

25

mV

180

mA

57

KHz

1.0

%

V

-2

µA

2.58

V

dB

mA

mA

V

1.1

3.15

V/V

1.1

V

dB

-10

µA

0.4

2.2

V

150

nS

150

nS

17.5

9.0

V

11.5

8.2

V

100

50

%

0

0.3

1

mA

17

mA

V

• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •

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