LD7550 Просмотр технического описания (PDF) - Unspecified

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Компоненты Описание

производитель

LD7550

Green-Mode PWM Controller

Unspecified 

Electrical Characteristics

(TA = +25oC unless otherwise stated, VCC=15.0V)

PARAMETER

CONDITIONS

Supply Voltage (Vcc Pin)

Startup Current

Operating Current

UVLO (off)

VCOMP=0V

VCOMP=3V

VCOMP=open

UVLO (on)

Voltage Feedback (Comp Pin)

Short Circuit Current

Open Loop Voltage

VCOMP=0V

COMP pin open

Green Mode Threshold VCOMP

Current Sensing (CS Pin)

Maximum Input Voltage

Leading Edge Blanking Time

Input impedance

Delay to Output

Oscillator (RT pin)

Frequency

RT=100KΩ

Green Mode Frequency

Fs=66.5KHz

Temp. Stability

(-30°C ~85°C)

Voltage Stability

(VCC=12V-30V)

Gate Drive Output (OUT Pin)

Output Low Level

VCC=15V, Io=20mA

Output High Level

VCC=15V, Io=20mA

Rising Time

Load Capacitance=1000pF

Falling Time

Load Capacitance=1000pF

LD7550

MIN

10.4

14.8

0.80

61.5

8

TYP

MAX UNITS

5

25

µA

3

4

mA

2

mA

0.7

mA

11.4

12.4

V

16.0

17.5

V

2.2

3.0

mA

5.0

V

2.35

V

0.85

0.90

V

250

nS

50

KΩ

300

nS

66.5

71.5 KHz

20

KHz

5

%

2

%

1

V

V

50

200

nS

30

125

nS

4

Leadtrend Technology Corporation

LD7550-DS-00 August 2004

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