L4990 Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

L4990

PRIMARY CONTROLLER

STMicroelectronics 

L4990 - L4990A

ELECTRICAL CHARACTERISTICS (VCC = 15V; Tj = 0 to 70°C; unless otherwise specified.)

Symbol

Parameter

REFERENCE SECTION

VO

Output Voltage

Line Regulation

Load Regulation

TS

Temperature Stability

Total Variation

IOS

Short Circuit Current

Power Down/UVLO

OSCILLATOR SECTION

Initial Accuracy

Accuracy

Initial Accuracy

Accuracy

Duty Cycle

Duty Cycle

Duty Cycle Accuracy

Oscillator Ramp Peak

Oscillator Ramp Valley

ERROR AMPLIFIER SECTION

Input Bias Current

VI

Input Voltage

GOPL

Open Loop Gain

SVR

Supply Voltage Rejection

VOL

Output Low Voltage

VOH

Output High Voltage

IO

Output Source Current

Output Sink Current

Unit Gain Bandwidth

SR

Slew Rate

PWM CURRENT SENSE SECTION

Ib

Input Bias Current

IS

Maximum Input Signal

Delay to Output

Gain

SOFT START

ISSC

SS Charge Current

ISSD

SS Discharge Current

VSSSAT SS Saturation Voltage

VSSCLAMP SS Clamp Voltage

LEADING EDGE BLANKING

Internal Masking Time

Test Condition

Min. Typ. Max. Unit

Tj = 25°C; IO = 1mA

VCC = 12 to 20V

IO = 1 to 20mA

Line, Load, Temperature

Vref = 0V

VCC = 8.5V; Isink = 0.5mA

4.925 5.0 5.075 V

2.0

15

mV

5.0

20

mV

0.4

mV/°C

4.875 5.0 5.125 V

30

150 mA

0.2

0.5

V

Tj = 25°C; RT = 4.42kΩ;

CT = 1nF; pin 15 Vref

285 300 315 kHz

RT = 4.42KΩ; VCC = 12 to 20V;

279

300

321

kHz

CT = 1nF; pin 15 = Vref

Tj = 25°C; RT = 4.42KΩ;

CT = 1nF; pin 15 OPEN

280 295 310 kHz

RT = 4.42KΩ; VCC = 12 to 20V; 275

295

315

kHz

CT = 1nF; pin 15 OPEN

pin 3 = 0,7V, pin 15 = Vref

pin 3 = 0.7V, pin 15 = OPEN

0

%

0

%

RT = 4.42kΩ CT = 1nF

pin 3 = 3.2V, pin 15 = Vref

45

%

pin 3 = 3.2V, pin 15 = OPEN

90

%

pin 3 = 2.02V, pin 15 = OPEN

37

40

43

%

3.0

V

1.0

V

VFB to GND

VCOMP = VFB

VCOMP = 2 to 4V

VCC = 12 to 20V

Isink = 2mA, VFB = 2.7V

Isou rce = 0.5mA, VFB = 2.3V

VCOMP > 4V, VFB = 2.3V

VCOMP = 1.1V, VFB = 2.7V

0.2

1.0

µA

2.42 2.5 2.58

V

60

90

dB

85

dB

1.1

V

5

6

V

0.5

1.3

mA

2

6

mA

2

4

MHz

8

V/µs

Isen = 0

VCOMP = 5V

3

15

µA

0.92 1.0 1.08

V

100

ns

2.85

3

3.15 V/V

VSS = 0.6V

DC = 0%

14

20

26

µA

200

µA

0.6

V

7

V

100

ns

3/24

Share Link: