SG1842L データシートの表示（PDF） - Microsemi Corporation

部品番号

コンポーネント説明

メーカー

SG1842L

Current Mode PWM Controller

Microsemi Corporation 

Electrical Characteristics (continued)

Electrical Characteristics (continued)

Symbol

Parameter

Test Conditions

Current Sense Section

CSAVOL Gain 2, 3

Maximum Input Signal2 VCOMP = 5V

PSRR

Power

Ratio2

Supply

Rejection

12V

≤

VCC

≤

25V

SG1842/43

SG2842/43

SG3842/43

Units

Min Typ Max Min Typ Max Min Typ Max

2.85 3 3.15 2.85 3 3.15 2.85 3 3.15 V/V

0.9 1 1.1 0.9 1 1.1 0.9 1 1.1 V

70

70

70

dB

CSIB Input Bias Current

-2 -10

-2 -10

-2 -10 µA

CSDELAY Delay to Output1

150 300

150 300

150 300 ns

Output Section

VOL Output Low Level

ISINK = 20mA

ISINK = 200mA

VOH Output High Level

ISOURCE = 20mA

ISOURCE = 200mA

RS

Rise Time

TJ = 25°C, CL = 1nF

FT

Fall Time

TJ = 25°C, CL = 1nF

Under-Voltage Lockout Section

0.1 0.4

0.1 0.4

0.1 0.4 V

1.5 2.2

1.5 2.2

1.5 2.2 V

13 13.5

13 13.5

13 13.5

V

12 13.5

12 13.5

12 13.5

V

50 150

50 150

50 150 ns

50 150

50 150

50 150 ns

UVLO Start Threshold

1842/2842/3842

1843/2843/3843

15 16 17 15 16 17 14.5 16 17.5 V

7.8 8.4 9.0 7.8 8.4 9.0 7.8 8.4 9.0 V

VSMIN

Min. Operation Voltage 1842/2842/3842

After Turn-On

1843/2843/3843

9 10 11 9 10 11 8.5 10 11.5 V

7.0 7.6 8.3 7.0 7.6 8.2 7.0 7.6 8.2 V

PWM Section

DCMAX Maximum Duty Cycle

93 95 100 90 95 100 90 95 100 %

DCMIN Minimum Duty Cycle

0

0

0%

Power Consumption Section

IS

Start-Up Current

I

Operating Supply

Current

VFB = VISENSE = 0V

0.5 1

11 17

0.5 1

11 17

0.5 1 mA

11 17 mA

Z

VCC Zener Voltage

ICC = 25mA

34

34

34

V

Notes:

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

2. Parameter measured at trip point of latch with VVFB = 0.

3. Gain defined as: A = ∆VCOMP / ∆VISENSE ; 0 ≤ VISENSE ≤ 0.8V

4. Adjust VCC above the start threshold before setting at 15V.

7

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