PJ3844B Просмотр технического описания (PDF) - Promax Johnton

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PJ3844B

High Performance Current Mode Controller

Promax Johnton 

PJ3844B / PJ3845B

High Performance Current Mode Controller

Parameter

CURRENT SENSE SECTION

Current Sense Input Voltage

Gain (Note 3 &4 )

Maximum Input Signal

Symbol

Gv

V3

Test Conditions

VPIN1=5V(Note 3 )

PJ3844B / PJ3845B

Min

Typ

Max

Unit

2.8

3.0

3.2

V/V

0.9

1.0

1.1

V

Supply VoltageRejection

SVR 12<Vi<25V(Note 3 )

-

70

-

dB

Input Bias Current

IB

-

-2.0

-10

mΑ

Delay to Output

Td

OUTPUT SECTION

Output Voltage

-

150

300

ns

Low State

VOL

Isink=20mA

Isink=200mA

-

0.1

0.4

-

1.5

2.2

V

High State

VOH

Isource=20mA Isource=200mA

13

13.5

-

12

13.5

-

Output Voltage Rise Time

tr

Output Voltage Fall Time

tf

UNDER-VOLTAGE LOCKOUT SECTION

Start-Up Threshold

TJ=25℃, CL=1.0nF (Note2 )

TJ=25℃, CL=1.0nF (Note2 )

-

50

150

ns

-

50

150

ns

PJ3844B

Vth

14.5

16

17.5

V

PJ3845B

Minimum Operating Voltage

After Turn-On

PJ3844B

VCC(min)

7.8

8.4

9.0

8.5

10

11.5

V

PJ3845B

PWM SECTION

Max. Duty Cycle

TOTAL STANDBY CURRENT

Start-Up Current

Operating Supply Current

DCmax

Ist

Ii

VPIN2=VPIN3=0V

7.0

7.6

8.2

44

48

50

%

-

0.1

0.5

mA

-

11

20

mA

Zener Voltage

Viz

Ii=25mA

30

34

-

V

Note:

1. Toggle flip flop used only in PJ3844 and PJ3845.

2. These parameters, although guaranteed, are not 100% tested in production.

3. Parameter measured at trip point of latch with VPIN2=0

4. Gain defined as : A = ∆VPIN1 ；0≦VPIN3≦0.8V.

∆VPIN3

5. Adjust Vi above the start threshold before setting at 15V.

3-14

2004/11. Rev B

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