UC3842T Просмотр технического описания (PDF) - STMicroelectronics

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производитель

UC3842T

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

STMicroelectronics 

UC3842T - UC3843T - UC3844T - UC3845T

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

OUTPUT SECTION

VOL Output Low Level

VOH Output High Level

VOLS UVLO Saturation

tr

Rise Time

tf

Fall Time

UNDER-VOLTAGE LOCKOUT SECTION

Start Threshold

Min Operating Voltage

After Turn-on

PWM SECTION

Maximum Duty Cycle

Minimum Duty Cycle

TOTAL STANDBY CURRENT

Ist

Start-up Current

Ii

Operating Supply Current

Viz

Zener Voltage

Test Conditions

ISINK = 20mA

ISINK = 200mA

ISOURCE = 20mA

ISOURCE = 200mA

VCC = 6V; ISINK = 1mA

Tj = 25°C CL = 1nF (2)

Tj = 25°C CL = 1nF (2)

UC3842T/4T

UC3843T/5T

UC3842T/4T

UC3843T/5T

UC3842T/3T

UC3844T/5T

Vi = 6.5V for UC3843T/45T

Vi = 14V for UC3842T/44T

VPIN2 = VPIN3 = 0V

Ii = 25mA

Value

Unit

Min. Typ. Max.

0.1

0.4

V

1.6

2.2

V

13 13.5

V

12 13.5

V

0.1

1.1

V

50

150 ns

50

150 ns

15

16

17

V

7.8

8.4

9.0

V

9

10

11

V

7.0

7.6

8.2

V

94

96

100 %

47

48

50

%

0

%

0.3

0.5 mA

0.3

0.5 mA

12

17 mA

30

36

V

Notes :

1. Max package power dissipation limits must be respected; low duty cycle pulse techniques are used during test maintain Tj as

close to Tamb as possible.

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 ≤ 0.8 V

∆ VPIN3

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

4/15

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